GitHub - aceat64/EasyBitcoin-PHP: A simple class for
GitHub - aceat64/EasyBitcoin-PHP: A simple class for
php - How do I use a class method as a callback function
php - Calling a function within a Class method? - Stack
Sending Emails in PHP with PHPMailer — SitePoint
PHP call Class method / function - Stack Overflow
Ispolink - The first automated workflow platform that utilizes AI and Blockchain technology
Introduction https://preview.redd.it/l1nywwngf6051.jpg?width=1049&format=pjpg&auto=webp&s=fb4d288084b98523d63afc1f8d6a0a61a5b6e7ea Ispolink is an advanced matchmaking platform designed to address one of the most fundamental challenges currently: finding top talent. According to a survey of global human capital trends from 2019, conducted by Deloitte, respondents were asked to rate their hiring functions. The key findings show that only 6% believe they have the best processes and technology in the classroom 81% of our survey respondents believe that their organizations hiring process is standard or sub-standard. 12% of respondents said they had strong sourcing technology and only 1% said they had strong screening technology. So, what has Ispolink done to solve these problems? Let's find out !!! https://preview.redd.it/gotrwlxhf6051.jpg?width=450&format=pjpg&auto=webp&s=2d1b724b85774e61aa852594469fa5ad03f5b542 First, they are trying to empower companies to take over their positions by providing them with all the tools to implement and manage the entire hiring process effectively - from application screening Members, through different interview stages until the final proposal is made, can all be done in the platform. To address the major limitations and scalability issues that may be encountered on the Ethereum main network, Ispolink will incorporate Matic Network expansion technology. Matic is a class 2 scaling solution, achieving scale using side chains for off-chain calculations while still ensuring asset security using Plasma frameworks and Proofof- Stake (PoS). solve scalability and usability issues while not compromising on hierarchy. Matic tries to solve scalability and usability issues while not affecting the decentralization and utilization of the existing developer community and ecosystem. Matic Network is a side / side chain expansion solution for existing platforms to provide outstanding scalability and user experience for DApps / user functions.
The Ispolink token is designed as means of payment in the Ispolink ecosystem that enables purchases of services within the platform like subscription packages for companies, featured job seekers, etc. Alternatively, users would be able to pay for services with debit/credit cards. However, the platform users that choose Ispolink token as payment method are entitled to receive discounted price of the purchased service. The Ispolink token will also incentivize and reward active and engaged users when certain conditions are met. Key Features
Machine learning We use Machine Learning to coordinate the best competitors for your business
Installed Crypto Payment You can pay for all administration with an implicit crypto installment framework
Easy to use We care deeply about meeting your own clients and giving you an intuitive and simple interface to use
Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything. The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years. In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.
UPDATED - Groestlcoin Core 2.18.2
This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables. NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.
Builds are now done through Gitian
Calls to getblocktemplate will fail if the segwit rule is not specified. Calling getblocktemplate without segwit specified is almost certainly a misconfiguration since doing so results in lower rewards for the miner. Failed calls will produce an error message describing how to enable the segwit rule.
A warning is printed if an unrecognized section name is used in the configuration file. Recognized sections are [test], [main], and [regtest].
Four new options are available for configuring the maximum number of messages that ZMQ will queue in memory (the "high water mark") before dropping additional messages. The default value is 1,000, the same as was used for previous releases.
The rpcallowip option can no longer be used to automatically listen on all network interfaces. Instead, the rpcbind parameter must be used to specify the IP addresses to listen on. Listening for RPC commands over a public network connection is insecure and should be disabled, so a warning is now printed if a user selects such a configuration. If you need to expose RPC in order to use a tool like Docker, ensure you only bind RPC to your localhost, e.g. docker run [...] -p 127.0.0.1:1441:1441 (this is an extra :1441 over the normal Docker port specification).
The rpcpassword option now causes a startup error if the password set in the configuration file contains a hash character (#), as it's ambiguous whether the hash character is meant for the password or as a comment.
The whitelistforcerelay option is used to relay transactions from whitelisted peers even when not accepted to the mempool. This option now defaults to being off, so that changes in policy and disconnect/ban behavior will not cause a node that is whitelisting another to be dropped by peers.
A new short about the JSON-RPC interface describes cases where the results of anRPC might contain inconsistencies between data sourced from differentsubsystems, such as wallet state and mempool state.
A new document introduces Groestlcoin Core's BIP174 interface, which is used to allow multiple programs to collaboratively work to create, sign, and broadcast new transactions. This is useful for offline (cold storage) wallets, multisig wallets, coinjoin implementations, and many other cases where two or more programs need to interact to generate a complete transaction.
The output script descriptor (https://github.com/groestlcoin/groestlcoin/blob/mastedoc/descriptors.md) documentation has been updated with information about new features in this still-developing language for describing the output scripts that a wallet or other program wants to receive notifications for, such as which addresses it wants to know received payments. The language is currently used in multiple new and updated RPCs described in these release notes and is expected to be adapted to other RPCs and to the underlying wallet structure.
A new --disable-bip70 option may be passed to ./configure to prevent Groestlcoin-Qt from being built with support for the BIP70 payment protocol or from linking libssl. As the payment protocol has exposed Groestlcoin Core to libssl vulnerabilities in the past, builders who don't need BIP70 support are encouraged to use this option to reduce their exposure to future vulnerabilities.
The minimum required version of Qt (when building the GUI) has been increased from 5.2 to 5.5.1 (the depends system provides 5.9.7)
getnodeaddresses returns peer addresses known to this node. It may be used to find nodes to connect to without using a DNS seeder.
listwalletdir returns a list of wallets in the wallet directory (either the default wallet directory or the directory configured bythe -walletdir parameter).
getrpcinfo returns runtime details of the RPC server. Currently, it returns an array of the currently active commands and how long they've been running.
deriveaddresses returns one or more addresses corresponding to an output descriptor.
getdescriptorinfo accepts a descriptor and returns information aboutit, including its computed checksum.
joinpsbts merges multiple distinct PSBTs into a single PSBT. The multiple PSBTs must have different inputs. The resulting PSBT will contain every input and output from all the PSBTs. Any signatures provided in any of the PSBTs will be dropped.
analyzepsbt examines a PSBT and provides information about what the PSBT contains and the next steps that need to be taken in order to complete the transaction. For each input of a PSBT, analyze psbt provides information about what information is missing for that input, including whether a UTXO needs to be provided, what pubkeys still need to be provided, which scripts need to be provided, and what signatures are still needed. Every input will also list which role is needed to complete that input, and analyzepsbt will also list the next role in general needed to complete the PSBT. analyzepsbt will also provide the estimated fee rate and estimated virtual size of the completed transaction if it has enough information to do so.
utxoupdatepsbt searches the set of Unspent Transaction Outputs (UTXOs) to find the outputs being spent by the partial transaction. PSBTs need to have the UTXOs being spent to be provided because the signing algorithm requires information from the UTXO being spent. For segwit inputs, only the UTXO itself is necessary. For non-segwit outputs, the entire previous transaction is needed so that signers can be sure that they are signing the correct thing. Unfortunately, because the UTXO set only contains UTXOs and not full transactions, utxoupdatepsbt will only add the UTXO for segwit inputs.
getpeerinfo now returns an additional minfeefilter field set to the peer's BIP133 fee filter. You can use this to detect that you have peers that are willing to accept transactions below the default minimum relay fee.
The mempool RPCs, such as getrawmempool with verbose=true, now return an additional "bip125-replaceable" value indicating whether thetransaction (or its unconfirmed ancestors) opts-in to asking nodes and miners to replace it with a higher-feerate transaction spending any of the same inputs.
settxfee previously silently ignored attempts to set the fee below the allowed minimums. It now prints a warning. The special value of"0" may still be used to request the minimum value.
getaddressinfo now provides an ischange field indicating whether the wallet used the address in a change output.
importmulti has been updated to support P2WSH, P2WPKH, P2SH-P2WPKH, and P2SH-P2WSH. Requests for P2WSH and P2SH-P2WSH accept an additional witnessscript parameter.
importmulti now returns an additional warnings field for each request with an array of strings explaining when fields are being ignored or are inconsistent, if there are any.
getaddressinfo now returns an additional solvable Boolean field when Groestlcoin Core knows enough about the address's scriptPubKey, optional redeemScript, and optional witnessScript for the wallet to be able to generate an unsigned input spending funds sent to that address.
The getaddressinfo, listunspent, and scantxoutset RPCs now return an additional desc field that contains an output descriptor containing all key paths and signing information for the address (except for the private key). The desc field is only returned for getaddressinfo and listunspent when the address is solvable.
importprivkey will preserve previously-set labels for addresses or public keys corresponding to the private key being imported. For example, if you imported a watch-only address with the label "coldwallet" in earlier releases of Groestlcoin Core, subsequently importing the private key would default to resetting the address's label to the default empty-string label (""). In this release, the previous label of "cold wallet" will be retained. If you optionally specify any label besides the default when calling importprivkey, the new label will be applied to the address.
getmininginfo now omits currentblockweight and currentblocktx when a block was never assembled via RPC on this node.
The getrawtransaction RPC & REST endpoints no longer check the unspent UTXO set for a transaction. The remaining behaviors are as follows:
If a blockhash is provided, check the corresponding block.
If no blockhash is provided, check the mempool.
If no blockhash is provided but txindex is enabled, also check txindex.
unloadwallet is now synchronous, meaning it will not return until the wallet is fully unloaded.
importmulti now supports importing of addresses from descriptors. A desc parameter can be provided instead of the "scriptPubKey" in are quest, as well as an optional range for ranged descriptors to specify the start and end of the range to import. Descriptors with key origin information imported through importmulti will have their key origin information stored in the wallet for use with creating PSBTs.
listunspent has been modified so that it also returns witnessScript, the witness script in the case of a P2WSH orP2SH-P2WSH output.
createwallet now has an optional blank argument that can be used to create a blank wallet. Blank wallets do not have any keys or HDseed. They cannot be opened in software older than 2.18.2. Once a blank wallet has a HD seed set (by using sethdseed) or private keys, scripts, addresses, and other watch only things have been imported, the wallet is no longer blank and can be opened in 2.17.2. Encrypting a blank wallet will also set a HD seed for it.
signrawtransaction is removed after being deprecated and hidden behind a special configuration option in version 2.17.2.
The 'account' API is removed after being deprecated in v2.17.2 The 'label' API was introduced in v2.17.2 as a replacement for accounts. See the release notes from v2.17.2 for a full description of the changes from the 'account' API to the 'label' API.
addwitnessaddress is removed after being deprecated in version 2.16.0.
generate is deprecated and will be fully removed in a subsequent major version. This RPC is only used for testing, but its implementation reached across multiple subsystems (wallet and mining), so it is being deprecated to simplify the wallet-node interface. Projects that are using generate for testing purposes should transition to using the generatetoaddress RPC, which does not require or use the wallet component. Calling generatetoaddress with an address returned by the getnewaddress RPC gives the same functionality as the old generate RPC. To continue using generate in this version, restart groestlcoind with the -deprecatedrpc=generate configuration option.
Be reminded that parts of the validateaddress command have been deprecated and moved to getaddressinfo. The following deprecated fields have moved to getaddressinfo: ismine, iswatchonly,script, hex, pubkeys, sigsrequired, pubkey, embedded,iscompressed, label, timestamp, hdkeypath, hdmasterkeyid.
The addresses field has been removed from the validateaddressand getaddressinfo RPC methods. This field was confusing since it referred to public keys using their P2PKH address. Clients should use the embedded.address field for P2SH or P2WSH wrapped addresses, and pubkeys for inspecting multisig participants.
A new /rest/blockhashbyheight/ endpoint is added for fetching the hash of the block in the current best blockchain based on its height (how many blocks it is after the Genesis Block).
A new Window menu is added alongside the existing File, Settings, and Help menus. Several items from the other menus that opened new windows have been moved to this new Window menu.
In the Send tab, the checkbox for "pay only the required fee" has been removed. Instead, the user can simply decrease the value in the Custom Fee rate field all the way down to the node's configured minimumrelay fee.
In the Overview tab, the watch-only balance will be the only balance shown if the wallet was created using the createwallet RPC and thedisable_private_keys parameter was set to true.
The launch-on-startup option is no longer available on macOS if compiled with macosx min version greater than 10.11 (useCXXFLAGS="-mmacosx-version-min=10.11" CFLAGS="-mmacosx-version-min=10.11" for setting the deployment sdkversion)
A new groestlcoin-wallet tool is now distributed alongside Groestlcoin Core's other executables. Without needing to use any RPCs, this tool can currently create a new wallet file or display some basic information about an existing wallet, such as whether the wallet is encrypted, whether it uses an HD seed, how many transactions it contains, and how many address book entries it has.
Since version 2.16.0, Groestlcoin Core's built-in wallet has defaulted to generating P2SH-wrapped segwit addresses when users want to receive payments. These addresses are backwards compatible with all widely used software. Starting with Groestlcoin Core 2.20.1 (expected about a year after 2.18.2), Groestlcoin Core will default to native segwitaddresses (bech32) that provide additional fee savings and other benefits. Currently, many wallets and services already support sending to bech32 addresses, and if the Groestlcoin Core project sees enough additional adoption, it will instead default to bech32 receiving addresses in Groestlcoin Core 2.19.1. P2SH-wrapped segwit addresses will continue to be provided if the user requests them in the GUI or by RPC, and anyone who doesn't want the update will be able to configure their default address type. (Similarly, pioneering users who want to change their default now may set the addresstype=bech32 configuration option in any Groestlcoin Core release from 2.16.0 up.)
BIP 61 reject messages are now deprecated. Reject messages have no use case on the P2P network and are only logged for debugging by most network nodes. Furthermore, they increase bandwidth and can be harmful for privacy and security. It has been possible to disable BIP 61 messages since v2.17.2 with the -enablebip61=0 option. BIP 61 messages will be disabled by default in a future version, before being removed entirely.
The submitblock RPC previously returned the reason a rejected block was invalid the first time it processed that block but returned a generic "duplicate" rejection message on subsequent occasions it processed the same block. It now always returns the fundamental reason for rejecting an invalid block and only returns "duplicate" for valid blocks it has already accepted.
A new submitheader RPC allows submitting block headers independently from their block. This is likely only useful for testing.
The signrawtransactionwithkey and signrawtransactionwithwallet RPCs have been modified so that they also optionally accept a witnessScript, the witness script in the case of a P2WSH orP2SH-P2WSH output. This is compatible with the change to listunspent.
For the walletprocesspsbt and walletcreatefundedpsbt RPCs, if thebip32derivs parameter is set to true but the key metadata for a public key has not been updated yet, then that key will have a derivation path as if it were just an independent key (i.e. no derivation path and its master fingerprint is itself).
The -usehd configuration option was removed in version 2.16.0 From that version onwards, all new wallets created are hierarchical deterministic wallets. This release makes specifying -usehd an invalid configuration option.
This release allows peers that your node automatically disconnected for misbehaviour (e.g. sending invalid data) to reconnect to your node if you have unused incoming connection slots. If your slots fill up, a misbehaving node will be disconnected to make room for nodes without a history of problems (unless the misbehaving node helps your node in some other way, such as by connecting to a part of the Internet from which you don't have many other peers). Previously, Groestlcoin Core banned the IP addresses of misbehaving peers for a period (default of 1 day); this was easily circumvented by attackers with multiple IP addresses. If you manually ban a peer, such as by using the setban RPC, all connections from that peer will still be rejected.
The key metadata will need to be upgraded the first time that the HDseed is available. For unencrypted wallets this will occur on wallet loading. For encrypted wallets this will occur the first time the wallet is unlocked.
Newly encrypted wallets will no longer require restarting the software. Instead such wallets will be completely unloaded and reloaded to achieve the same effect.
A sub-project of Bitcoin Core now provides Hardware Wallet Interaction (HWI) scripts that allow command-line users to use several popular hardware key management devices with Groestlcoin Core. See their project page for details.
This release changes the Random Number Generator (RNG) used from OpenSSL to Groestlcoin Core's own implementation, although entropy gathered by Groestlcoin Core is fed out to OpenSSL and then read back in when the program needs strong randomness. This moves Groestlcoin Core a little closer to no longer needing to depend on OpenSSL, a dependency that has caused security issues in the past. The new implementation gathers entropy from multiple sources, including from hardware supporting the rdseed CPU instruction.
On macOS, Groestlcoin Core now opts out of application CPU throttling ("app nap") during initial blockchain download, when catching up from over 100 blocks behind the current chain tip, or when reindexing chain data. This helps prevent these operations from taking an excessively long time because the operating system is attempting to conserve power.
How to Upgrade?
Windows If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer. OSX If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), run the dmg and drag Groestlcoin Core to Applications. Ubuntu http://groestlcoin.org/forum/index.php?topic=441.0
ALL NEW - Groestlcoin Moonshine iOS/Android Wallet
Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network. GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.
Groestlcoin Mainnet & Testnet supported
Multiple wallet support
Electrum - Support for both random and custom peers
Biometric + Pin authentication
Custom fee selection
Import mnemonic phrases via manual entry or scanning
BIP39 Passphrase functionality
Support for Segwit-compatible & legacy addresses in settings
Support individual private key sweeping
UTXO blacklisting - Accessible via the Transaction Detail view, this allows users to blacklist any utxo that they do not wish to include in their list of available utxo's when sending transactions. Blacklisting a utxo excludes its amount from the wallet's total balance.
Ability to Sign & Verify Messages
Support BitID for password-free authentication
Coin Control - This can be accessed from the Send Transaction view and basically allows users to select from a list of available UTXO's to include in their transaction.
HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled. HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user. Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.
Simplified payment verification for fast mobile performance
Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases. This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats. To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.
If a word is wrong, the tool will try to suggest the closest option.
If a word is missing or unknown, please type "?" instead and the tool will find all relevant options.
NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator. VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline. If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address. VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase. VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).
Fixed size arithmetic
Fast Modular Inversion (Delayed Right Shift 62 bits)
SecpK1 Fast modular multiplication (2 steps folding 512bits to 256bits using 64 bits digits)
Use some properties of elliptic curve to generate more keys
SSE Secure Hash Algorithm SHA256 and RIPEMD160 (CPU)
Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet. If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).
Ability to continue finding keys after first one is found
Includes warning on start-up if connected to the internet
Ability to output keys to a text file (And shows button to open that directory)
Show and hide the private key with a simple toggle switch
Show full output of commands
Ability to choose between Processor (CPU) and Graphics Card (GPU) ( NVidia ONLY! )
Features both a Light and Dark Material Design-Style Themes
Free software - MIT. Anyone can audit the code.
Written in C# - The code is short, and easy to review.
Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode. This wallet was previously deprecated but has been brought back to life with modern standards.
Works via TOR or SOCKS5 proxy
Can use bootstrap.dat format as blockchain database
Import/Export blockchain to/from bootstrap.dat
Import wallet.dat from Groestlcoin-qt wallet
Export wallet to wallet.dat
Use both groestlcoin-wpf and groestlcoin-qt with the same addresses in parallel. When you send money from one program, the transaction will automatically be visible on the other wallet.
Rescan blockchain with a simple mouse click
Works as a full node and listens to port 1331 (listening port can be changed)
Fast Block verifying, parallel processing on multi-core CPUs
Mine Groestlcoins with your CPU by a simple mouse click
All private keys are kept encrypted on your local machine (or on a USB stick)
Lite - Has a lightweight "thin client" mode which does not require a new user to download the entire Groestlcoin chain and store it
Free and decentralised - Open Source under GNU license
Fixed Import/Export to wallet.dat
Rescan wallet option
Change wallet password option
Address type and Change type options through *.conf file
Import from bootstrap.dat - It is a flat, binary file containing Groestlcoin blockchain data, from the genesis block through a recent height. All versions automatically validate and import the file "grs.bootstrap.dat" in the GRS directory. Grs.bootstrap.dat is compatible with Qt wallet. GroestlCoin-Qt can load from it.
In Full mode file %APPDATA%\Groestlcoin-WPF\GRS\GRS.bootstrap.dat is full blockchain in standard bootstrap.dat format and can be used with other clients.
Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node. It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node. Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine. Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in. Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet. Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.
Use your own node
Uses less CPU and RAM than ElectrumX
Used intermittently rather than needing to be always-on
Doesn't require an index of every Groestlcoin address ever used like on ElectrumX
UPDATED – Android Wallet 7.38.1 - Main Net + Test Net
The app allows you to send and receive Groestlcoin on your device using QR codes and URI links. When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.
Add confidence messages, helping users to understand the confidence state of their payments.
Handle edge case when restoring via an external app.
Count devices with a memory class of 128 MB as low ram.
Introduce dark mode on Android 10 devices.
Reduce memory usage of PIN-protected wallets.
Tapping on the app's version will reveal a checksum of the APK that was installed.
Fix issue with confirmation of transactions that empty your wallet.
Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets). Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet. Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.
Digital Gold investment is becoming more interesting
https://preview.redd.it/id9xpqxqpus41.jpg?width=275&format=pjpg&auto=webp&s=c911ee29382a4e1e44837f91d1973123a28f919a It is very uncovering to state that the interest for gold is expanding on a yearly premise. This is obvious in the way that the value continues taking off high. Much the same as the financial hypothesis that says "the more the interest, the higher the value." It is an immediate connection. More increment has, in any case, been enacted in light of the fact that there now exist simpler methods for buying gold, which is through the digitalization of gold, called Digital Gold. https://preview.redd.it/u5skfwtopus41.jpg?width=259&format=pjpg&auto=webp&s=76ca5d2af0862a02818239292207fca81e325877 A few people previously named Bitcoin to be computerized gold, however, what I am discussing, is the genuine gold, i.e, the physical gold being digitalized. I have additionally watched this, because of the way that as of late, the group of Digital Gold venture purchased progressively gold bars, to add to the ones that have been spared safely in the bullion vault. Which could more readily be deciphered to state that, speculators right now expanding and that means an expansion in gold interest in the whole gold market. A great deal of financial specialists and gold aficionados are energized that Digital gold task is picking up the acknowledgement it merits. Among every single other venture that came out to state, they are gold tasks on the blockchain, Digital Gold undertaking is the main reason among all. I have now come to pose myself a few inquiries, on why such huge numbers of individuals appear to be keen on the Digital Gold undertaking, in which I have now thought of a portion of these affirmations: The benefit of purchasing any mount: This is an undertaking for all classes of individuals, independent of your status. You can buy any sum as you wish. Albeit, 1 GOLD token = 1 gram of gold, whose value presently spins around $50 in the gold market, you can buy a sum underneath that and you can buy more. Simple, quick and modest exchange: The venture group chose to pick the EThreum system to empower simple, quick and modest exchange. There is no type of postponement. You can move your GOLD to whoever you wish with no issue and you can acknowledge it in like way. Simple stockpiling: The capacity of your GOLD token is never an issue. Truth be told, the security is in your grasp since you hold the private key. Everything is kept private with you. Security and Insurance: Just a prior stated, that you hold the private key, gives you the most guaranteed security you can ever consider, aside from you choose to give up it to another person. That being stated, I conceive that Digital Gold will keep on being on the high increment with time. Truly, the interest is expanding and there is no type of stoppage to it. Trades on which it is exchanged There is a gold market gave on Digital Gold site. Deals and buy are moments. Administrations are accessible nonstop. You can execute with either Ethereum or Bitcoin, incorporating with the GOLD token you have. Here is the market: https://gold.storage/showcase Different trades can be found through the connection beneath. I am anyway happy to advise you that, they are worldwide trades, with a great many merchants, great volume, high liquidity and very much made sure about. https://coinmarketcap.com/monetary forms/advanced gold/markets/ For more information about Digital Gold project, you can visit the following links: Website: https://gold.storage/home Facebook: https://www.facebook.com/golderc20 Ann: https://bitcointalk.org/index.php?topic=5161544 Medium: https://medium.com/@digitalgoldcoin Whitepaper: https://gold.storage/wp.pdf My Bitcointalk profile link: https://bitcointalk.org/index.php?action=profile;u=2150171 Bitcointalk Username: pedpedped101
Digital Gold: anonymous and secure investment in gold
https://preview.redd.it/jtdjxndp5nn41.jpg?width=272&format=pjpg&auto=webp&s=257ff6776d852a7340cb6d297e2fb84d6bc4d0fa The valuable metal, gold has continually been an esteemed resource. In actuality, among practically all metals, gold consistently accompanies such extraordinary regard, clearly because of the high worth put on it for quite a long while. As the year's cruises by, numerous people have had a goal at saving gold as a life resource. Numerous social and financial exercises have put an incredibly motivating force on gold, this has truly anticipated the estimation of gold. Invested individuals, for example, business ventures and other related groupings have consistently considered gold to be a benefit whose worth is consistently maintained by numerous individuals over the globe. The estimation of gold has expanded consistently after some time and this makes it a commendable coin. https://preview.redd.it/esbqu2yr5nn41.jpg?width=259&format=pjpg&auto=webp&s=f8eb17f48173dbf5c7bee5f6f6a7c5e087225b32 The connection between gold and blockchain The advent of blockchain technology procreated bitcoin, which is a cryptocurrency. At first, blockchain innovation offered conspicuousness to bitcoin, yet with time, it has additionally helped in the improvement of a few different digital forms of money famously alluded to as altcoins. Right now, it has likewise been recognized that gold, which is a famous valuable metal, can likewise be handily digitized, which is an extraordinary possibility for some individuals to acknowledge cryptographic forms of money. https://preview.redd.it/20u374mo9nn41.jpg?width=300&format=pjpg&auto=webp&s=8c41ff01429bb14b524a2c658d2bb5e2732354cb What gold is and why you should get some Gold has continually being a looked for after resource for financial specialists and purchasers the same; for speculators — it gives a way to develop their venture over the long run and fill in as a store of riches, for buyers, in any case, it gives probably the best material for making extravagance things — from autos to wristwatches, adornments, and other Veblen merchandise. These have served to additionally build the interest for the valuable metal. Gold throughout the years has substantiated itself commendable speculation. In the course of recent years, it has acknowledged in an incentive by over 97% making it one of the most wanted things for extravagance products authorities. The wasteful procedure of the gold buy framework For the normal financial specialist, buying gold with the end goal of venture couldn't be any progressively repetitive — from the recording of various desk work for proper personality check, the legitimate procedures engaged with the exchange, to the settlement of outsiders and the protected stockpiling of the gold being bought. This procedure devours time as well as significant assets. This has served to discourage financial specialists who don't have considerable capital from putting resources into gold. How Digital Gold makes gold open to everybody. The wasteful procedure for the buying of gold doesn't empower little capital financial specialists, totally barring a huge level of dynamic speculators from the gold markets. So as to make gold accessible to all classes of financial specialists, DIGITAL GOLD LTD has built up the token — GOLD. https://preview.redd.it/lucymo98ann41.jpg?width=640&format=pjpg&auto=webp&s=e3aaf5320713a77b7f9cacd15ccf9b16a8b7c624 GOLD or gold? GOLD is a token agreeable with the ERC20 convention of the Ethereum framework. A GOLD token gives inclusion to one gram of fine venture grade gold of 99% virtue. This makes it simple to make little measured interests in gold without the problems of insignificant desk work, taking into account the moment and unknown acquisition of gold. Since GOLD just gives inclusion of the measure of gold bought, the genuine gold which backs the GOLD token is truly dedicated to the organization's vault, thus, at whatever point GOLD tokens are bought, an equal measure of gold is vaulted. Standard reviews of GOLD and the measure of gold in the organization's vault is taken by the legitimate BullionStar — an accomplice of the venture. Advanced GOLD is a liquidity-supplier, along these lines institutional evaluation speculators and huge capital financial specialists can make huge GOLD buys without the dread of inadequate gold stock. https://preview.redd.it/lbg1cancann41.jpg?width=300&format=pjpg&auto=webp&s=a8353c06ed940d1f9d3dddfb4b5309b59a94efa2 Why you should buy GOLD GOLD furnishes holders with the security of buying gold while guaranteeing that tokens don't fill in as only a store of significant worth, in contrast to gold. GOLD holders can without much of a stretch profit by the value strength, long haul thankfulness in the estimation of gold, just as an advantage from the utilization of the token for a day by day costs and buys. A portion of the significant advantages of the utilization of GOLD include: Consistent, mysterious, and moment acquisition of gold: Gone are the times of long methodology and relentless desk work just to buy gold. Utilizing digital forms of money like Bitcoin and Ether, speculators can undoubtedly and in a split second buy gold through GOLD. This dispenses with pointless outsiders while making gold proprietorship simple and mysterious. The secure capacity of gold: Any financial specialist hoping to put resources into gold must have fitting stockpiling set up so as to guarantee its security. GOLD token holders need not stress over, for example, the physical gold is safely put away in the DIGITAL GOLD organization's vault, guaranteeing resource wellbeing consistently. Access to misrepresentation free worldwide markets: The gold market is a worldwide one with various governments holding gold in its stores. The gold market which is overwhelmingly available to huge capital people and foundations is made effectively open to all units of speculators through GOLD. GOLD can likewise be utilized to fence against different digital forms of money, giving capital security on account of high unpredictability cryptographic money economic situations because of its value dependability. https://preview.redd.it/7toyvryfann41.jpg?width=300&format=pjpg&auto=webp&s=ac46aead4851e1a01c41f5002a7ba4feccedb6fa The most effective method to buy GOLD Trade procedure and cost on the Digital Gold Marketplace as at distributing Buying GOLD couldn't be any simpler, the DIGITAL GOLD stage is a completely useful biological system which has its own commercial centre. GOLD tokens can without much of a stretch be traded for digital currencies like Bitcoin and Ether. The commercial centre is outfitted with fundamental instruments to help with advertising investigation and value projection. The buy and deal framework is constrained by savvy contracts, taking into account consistent exchanges. Client service is likewise promptly accessible to help people with questions and other significant data on getting to the commercial centre and different highlights of the stage. So as to encourage further liquidity for GOLD, it will be recorded on more trades. GOLD is likewise accessible for buy on Cryptex. https://preview.redd.it/kqpbf47iann41.jpg?width=214&format=pjpg&auto=webp&s=99a851370eae12a755ffbbdb167e673e3022f952 Conclusion GOLD gives people hoping to profit by putting resources into gold with an exceptionally fluid alternative which additionally furnishes them with a chance to use the advantages of blockchain innovation which considers trustless unchanging exchanges. Computerized GOLD furnishes people with low-speculation capital hoping to put resources into the gold and digital currency markets for benefits. It additionally makes a practical arrangement which encourages the changing of people from representatives to speculators, empowering them to make ventures and construct themselves an inactive wellspring of salary from the gratefulness in the estimation of gold. For more information about Digital Gold project, you can visit the following links: Website: https://gold.storage/home Facebook: https://www.facebook.com/golderc20 Ann: https://bitcointalk.org/index.php?topic=5161544 Medium: https://medium.com/@digitalgoldcoin Whitepaper: https://gold.storage/wp.pdf My Bitcointalk profile link: https://bitcointalk.org/index.php?action=profile;u=2150171 Bitcointalk Username: pedpedped101
190 университетов бесплатно выложили сотни своих курсов. Если вы не слышали, университеты по всему миру предлагают свои курсы онлайн бесплатно (или, по крайней мере, частично бесплатно). Эти курсы называются БООК или Большие открытые онлайн–курсы. Часть 1
CNIT 40: DNS Security DNS is crucial for all Internet transactions, but it is subject to numerous security risks, including phishing, hijacking, packet amplification, spoofing, snooping, poisoning, and more. Learn how to configure secure DNS servers, and to detect malicious activity with DNS monitoring. We will also cover DNSSEC principles and deployment. Students will perform hands-on projects deploying secure DNS servers on both Windows and Linux platforms.
CNIT 120 - Network Security Knowledge and skills required for Network Administrators and Information Technology professionals to be aware of security vulnerabilities, to implement security measures, to analyze an existing network environment in consideration of known security threats or risks, to defend against attacks or viruses, and to ensure data privacy and integrity. Terminology and procedures for implementation and configuration of security, including access control, authorization, encryption, packet filters, firewalls, and Virtual Private Networks (VPNs).
CNIT 121 - Computer Forensics The class covers forensics tools, methods, and procedures used for investigation of computers, techniques of data recovery and evidence collection, protection of evidence, expert witness skills, and computer crime investigation techniques. Includes analysis of various file systems and specialized diagnostic software used to retrieve data. Prepares for part of the industry standard certification exam, Security+, and also maps to the Computer Investigation Specialists exam.
CNIT 123 - Ethical Hacking and Network Defense Students learn how hackers attack computers and networks, and how to protect systems from such attacks, using both Windows and Linux systems. Students will learn legal restrictions and ethical guidelines, and will be required to obey them. Students will perform many hands-on labs, both attacking and defending, using port scans, footprinting, exploiting Windows and Linux vulnerabilities, buffer overflow exploits, SQL injection, privilege escalation, Trojans, and backdoors.
CNIT 124 - Advanced Ethical Hacking Advanced techniques of defeating computer security, and countermeasures to protect Windows and Unix/Linux systems. Hands-on labs include Google hacking, automated footprinting, sophisticated ping and port scans, privilege escalation, attacks against telephone and Voice over Internet Protocol (VoIP) systems, routers, firewalls, wireless devices, Web servers, and Denial of Service attacks.
CNIT 126 - Practical Malware Analysis Learn how to analyze malware, including computer viruses, trojans, and rootkits, using disassemblers, debuggers, static and dynamic analysis, using IDA Pro, OllyDbg and other tools.
CNIT 127 - Exploit Development Learn how to find vulnerabilities and exploit them to gain control of target systems, including Linux, Windows, Mac, and Cisco. This class covers how to write tools, not just how to use them; essential skills for advanced penetration testers and software security professionals.
CNIT 128 - Hacking Mobile Devices Mobile devices such as smartphones and tablets are now used for making purchases, emails, social networking, and many other risky activities. These devices run specialized operating systems have many security problems. This class will cover how mobile operating systems and apps work, how to find and exploit vulnerabilities in them, and how to defend them. Topics will include phone call, voicemail, and SMS intrusion, jailbreaking, rooting, NFC attacks, malware, browser exploitation, and application vulnerabilities. Hands-on projects will include as many of these activities as are practical and legal.
CNIT 129S: Securing Web Applications Techniques used by attackers to breach Web applications, and how to protect them. How to secure authentication, access, databases, and back-end components. How to protect users from each other. How to find common vulnerabilities in compiled code and source code.
CNIT 140: IT Security Practices Training students for cybersecurity competitions, including CTF events and the Collegiate Cyberdefense Competition (CCDC). This training will prepare students for employment as security professionals, and if our team does well in the competitions, the competitors will gain recognition and respect which should lead to more and better job offers.
Florida State University's - Offensive Network Security This class allows students to look deep into know protocols (i.e. IP, TCP, UDP) to see how an attacker can utilize these protocols to their advantage and how to spot issues in a network via captured network traffic. The first half of this course focuses on know protocols while the second half of the class focuses on reverse engineering unknown protocols. This class will utilize captured traffic to allow students to reverse the protocol by using known techniques such as incorporating bioinformatics introduced by Marshall Beddoe. This class will also cover fuzzing protocols to see if the server or client have vulnerabilities. Overall, a student finishing this class will have a better understanding of the network layers, protocols, and network communication and their interaction in computer networks.
Florida State University's - Offensive Computer Security The primary incentive for an attacker to exploit a vulnerability, or series of vulnerabilities is to achieve a return on an investment (his/her time usually). This return need not be strictly monetary, an attacker may be interested in obtaining access to data, identities, or some other commodity that is valuable to them. The field of penetration testing involves authorized auditing and exploitation of systems to assess actual system security in order to protect against attackers. This requires thorough knowledge of vulnerabilities and how to exploit them. Thus, this course provides an introductory but comprehensive coverage of the fundamental methodologies, skills, legal issues, and tools used in white hat penetration testing and secure system administration.
NYU Tandon School of Engineering - OSIRIS Lab's Hack Night Developed from the materials of NYU Tandon's old Penetration Testing and Vulnerability Analysis course, Hack Night is a sobering introduction to offensive security. A lot of complex technical content is covered very quickly as students are introduced to a wide variety of complex and immersive topics over thirteen weeks.
Rensselaer Polytechnic Institute - Malware Analysis This course will introduce students to modern malware analysis techniques through readings and hands-on interactive analysis of real-world samples. After taking this course students will be equipped with the skills to analyze advanced contemporary malware using both static and dynamic analysis.
SCAM Alert !!!! SIMPLEX.com is a fraud company. do not use them also under BUYEGLCOM
📷Bitcoin•Posted byu/muneer29082 years ago Hello, Thank you for contacting Simplex Support. - this was before i even had a wallet created Going over your transactions, it would seem that the BCH, you've purchased has already been transferred to your account.You can see it listed to the address provided on the blockchain:https://www.blockchain.com/bch/address/bitcoincash:qpn....If you do not see your funds in the wallet, please contact your wallet provider for further investigation.Please kindly be aware that since your payment was already approved and the cryptocurrency has already been sent, there is nothing we can do - once the cryptocurrency is sent, we have no more control over it and our part in the transaction is over. If you have any further questions, please reply to this email. All the best,DaveSimplex Support Team📷 For live updates 📷
SCAM Alert !!!! SIMPLEX.com is a fraud company.
📷 SCAM Alert !!!! SIMPLEX.com is a fraud company. Save yourself. Never use your credit card on any platform (e.g. bitcoin.com, changelly.com etc) that has partnered with simplex.com for credit card purchases. This is a 101% scam. Never use your credit card to buy bitcoins from any platform who are partnered with simplex.com for processing of credit card payments. simplex.com is a scam to steal your hard earned money. they are crooks of ultimate order. save yourself from being scammed. you have been warned. 31 CommentsGive AwardShareSaveHideReport60% UpvotedThis thread is archivedNew comments cannot be posted and votes cannot be castSORT BYBestView discussions in1othercommunitylevel 1sagy19896 points·2 years ago i dont know guys what are you talking about !! i bought from them like 5 or 6 time with no problem , it was fast and i received all my btc within an hour , i only dont like the 7.5% fees they charge , but they still the cheapest btc seller i experienced Give AwardShareReportSavelevel 2ChickfilaPlug1 point·1 year ago How long did it take to recieve your tokens Give AwardShareReportSavelevel 3bablon791 point·1 year ago I was have good experience with SIMPLEX but one time I buy Bitcoin after 5 days I received email say you cancel my transaction And you will Refund my money back Within 42 hours I wait more than 5 days you never return my money back I called my bank to cancel transaction very bad service sorry Sarah ( go find you another job) Give AwardShareReportSavelevel 1cyb3r_joe3 points·2 years ago Well I purchased btc from CoinGate/Simplex using a credit card and I am starting to regret. I thought it would be the "easiest way to buy btc with credit card" according to their website... So here's the process, they ask for your wallet address, then, all you credit card info, then a selfie of you holding the credit card, then they withdraw funds, and ask for more info like upload of image of you DL, as I was doing this the site crashed, but they withdrew the $$ from my bank account. I got one email from simplex stating--- basically they take your money without verifying!!! Like if you can't handle amount if transactions, DO NOT take peoples money. NOT COOL!!! "Thank you for submitting your payment. It is currently being verified. Simplex payment ID: XXXX XXX XX X XXXX Please note the this verification process may take some time. We appreciate your patience, as we are fully committed to ensure you receive a quick response. So, what’s going on with your money now? Simplex is currently verifying your transaction. It is possible that you will notice a charge in your credit card account. This is only an authorization check, automatically made in order to reserve the amount in case the payment is approved. If the payment doesn't go through (cancelled, expired or failed), this authorization check will be voided in no more than 48 hours, and you will not see the charge in your account. Give AwardShareReportSavelevel 2Comment deleted by user2 years agolevel 3cyb3r_joe1 point·2 years ago No, sorry to report that simplex has not yet delivered my coins, approved the transaction, or canceled the pending charge on my account Give AwardShareReportSavelevel 4ChickfilaPlug1 point·1 year ago Did you ever recieve your coins or money back? Stumbling across this old post as I purchased 3 hours ago and haven't recieved my coins Give AwardShareReportSavelevel 1SarahKinney3 points·2 years ago Hello, My name is Sarah and I am the Head of Customer Relations at Simplex. I understand your frustration and will do my best to help you out. First I would like to assure you that Simplex is not a scam. We are a fully licensed financial institute in the EU, and take extreme measures to ensure the safety of all the transactions that are sent to us. Kindly send me your transaction ID so I could take a closer look and handle the issue personally: [[email protected]](mailto:[email protected]) The transaction ID is the long string of numbers and letters that appear in any of the emails we sent you regarding your payment. Sincerely, Sarah Kinney Head of Customer Relations Simplex Give AwardShareReportSavelevel 2iamchriswick2 points·2 years ago So, miss Kinney... As you have failed to comply with the regulations of Norwegian law, and the vast amount of customer complaints towards you from our clients in Norway, we have decided to send out an red flag alert warning all our clients to stay away from using your services. C.W. VISA Europe Give AwardShareReportSavelevel 2sector801 point·2 years ago Please take a look at this transaction and tell me what is going on I never completed of verification and cancelled but funds were still taken please inform me what is going on if you are not a scammer?? Simplex payment ID: ebca70a7-801f-4706-b669-c305568be80d Give AwardShareReportSavelevel 1paulsepolia3 points·2 years ago SCAM. They charged my credit card £1200 and never received the receipt and the bitcoins ... Give AwardShareReportSavelevel 2Mk1spyder3 points·2 years ago TOTAL SCAM SIMPLEX IS RAPING EVERYONE I lost $1100 to them Give AwardShareReportSavelevel 2TheBatGlitters3 points·2 years ago This happened to me... right now. My money is gone and there are no coins. I think I will be needing to contact my bank about this. Give AwardShareReportSavelevel 1yusa243 points·2 years ago same thing happened to me can i cancel my bank transaction? Give AwardShareReportSavelevel 1skyracer7772 points·2 years ago Simplex is 100% Scam I have exactly the same issue, exactly same replies from them, generic emails. 1 month after no resolution and my ticket deleted. Credit card charged no Crypto no $ returned. I have requested my bank to reverse transaction. What i think is going to happen is that Australian banks will start declining transactions to crypto wallets. Other thing is i think we should punish this sort of fckrs We could start a class action lawsuit:https://www.consumer-action.org/lawsuits/ Give AwardShareReportSavelevel 1PrinceShootingStars2 points·1 year ago I saw this post as soon as I made €200 payment via Changelly and I was scared to death that I've lost money again. However, while I was here worrying and going through the post, little didi I know that an email had been sent to me that the verification was successful and that my BTC would be deposited into my wallet soon and voila, I checked my wallet and I found the BTC there. I'm talking about less than 20 minutes here guys, so you can't imagine my joy, it was as if somebody gave me money. My take: Those that encountered problem could be due to the fact that they are mostly Non-European holders and that Simplex has problem linking well with USD cards, I live in Europe and they are European based company, so they might find it easier to integrate well with European SEPA cards (in my own case). It could also be that they had major transaction problems before which has now been resolved. All these are just my assumptions, so disregard anything that sounds like jargons t you. Cheers. Give AwardShareReportSavelevel 1crypto_master5001 point·2 years ago I had an experience where I tried to purchase 1 BTC from them in June and they charged my card but never delivered the BTC on Bitstamp. My credit card refunded the transaction. Give AwardShareReportSavelevel 1raghav9861 point·2 years ago Yes it's a scam My payment id's Simplex payment ID: 8b2342a2-4884-4c38-834c-8712be2e93d6 Simplex payment ID: db4f5df7-de09-4d78-87e6-d7633aa99ed2 For one transaction of 750$ i didn't even received ID from them but money got deducted. They don't reply at all My 2700$ stucked. They guys removed my reviews from trust pilot and facebook. check here i shared some screenshot as well https://forum.bitcoin.com/scam-accusations/simplex-com-is-scam-stay-away-t61521.html Give AwardShareReportSavelevel 1cyb3r_joe1 point·2 years ago This is Simplex CEO/ Founder Nimrod Lehavi https://www.facebook.com/nimrodlehavi Give AwardShareReportSavelevel 1cryptosubba1 point·2 years ago I also purchased bitcoins from changelly.com on 13th. 12, 2017 using simplex.com and it is now 17th. and they have not refunded the amount that they had charged in full. I have posted about it at:https://bitcointalk.org/index.php?topic=2595909.0 and https://forums.boxmining.com/threads/is-changelly-com-and-simplex-com-fraud.427/#post-3229 Give AwardShareReportSavelevel 1Jmahumada1 point·2 years ago Credit card charged after payment request cancellation from Changelly I wanted to exchange money from Changelly using my credit card, so I went through the process. I was taken to SIMPLEX API and entered my details; however I did not get to upload my picture holding the card for verification and decided to CANCEL the payment. To my surprise, my money was WITHDRAWN from my account regardless. I've checked with my bank and they have confirmed this. I emailed support 12 hours ago and still waiting for someone to have the kindness to reply. I received a follow up URL when I emailed support, however it does not go anywhere. I am also not allowed to login or register using my Changelly email address AND on top of that social media login does not work either. I am getting very anxious due to the large number of complaints, so I am wondering how long to wait for a payment reversal transaction before initiating a dispute through my bank; I did not buy any coins and ended up with a charge of $2,072.69 NZD on my credit card. Payment cancellation email I received was as follows: Dear xxxx, Your payment request from Changelly has been cancelled. You chose to cancel the payment. Simplex payment ID: aa16338a-a0e9-448d-b6f4-7e85bbfe0279 For more information, contact us at... or visit our FAQ section at simplex.com/ faq. Please do not try to reach Simplex's support using any other method (such as social media), as you might be mislead by imposters ... Should I hear from Simplex I'll let you all know by posting here and I am more than happy to amend my rating; at this stage this is purely based on the support I've received from them, and of course the unhappiness of my credit card being charged without having purchased anything I'll appreciate any feedback from guys. Cheers, Jose. Give AwardShareReportSavelevel 1[deleted]1 point·2 years ago This happened to me as well. Ordered bitcoins on 21 Dec 2017 Paid for bitcoins on 21 Dec 2017 ID provided on 21 Dec 2017Bitcoin price crashed and recoveredOrder cancelled on 26 Dec 2017 Emailed Simplex support and payment support on 27 Dec 2017 - no response Emailed Simplex support and payment support on 28 Dec 2017 - no response Emailed Simplex support and payment support on 8 Jan 2017 - no response Emailed [email protected] on 9 Jan 2017 - waiting ShareReportSavelevel 1Beetlemire1 point·1 year ago I've been going through this same scenario as everyone else here. Went through Mycelium to by bitcoin on the 10th of this month. Was sent to simplex for verification. Stayed in touch with their customer service and was told it could take 2 to 3 days. Had to send photo of license and everything else. Was planning on contacting them again tomorrow and then having cc charge back if nothing happened. Well I just received an email that my payment was cancelled due to changes in BTC rate. I'm happy to report that my money has been returned to my card (i use a secured cc cause I was a fool in my younger days, not that much has changed). I just wanted to report this to give some of you hope. The last 2 days I've been stressful as hell. It was less then $100 but for me that's a lot of money to lose. Good luck to you all. Give AwardShareReportSavelevel 2ChickfilaPlug1 point·1 year ago I recently just bought earlier today and am worried if I'll get my bitcoins or if I'm going to get scammed Give AwardShareReportSavelevel 1deech0131 point·1 year ago I didn't do my due diligence, and never heard of SIMPLEX defrauding Bitcoin consumers. And so, I exchanged around a c-note into BTC through SIMPLEX.com on 02/21/2018, and the funds appeared in my Wallet within a few hours.... So maybe they don't scam everyone??? Give AwardShareReportSavelevel 1uclabruinfan751 point·1 year ago A more appropriate description for simplex would be money launderers. I have made over 10 debit card transactions with Simplex - the charges are authorized by my bank and then Simplex, for some inexplicable reason, will credit back my account for that exact amount with no explanation given. I have completed all the required verifications so simplex knows that the charge is being made from my debit card. basically money goes from my bank to simplex and simplex returns that exact amount to my bank. Give AwardShareReportSavelevel 1[deleted]1 point·1 year ago Was going to make a small purchase earlier (~$100) but I wasn't aware they would require a photo of my ID. This isn't happening, no chance in hell. The "live chat" available on their site is fully automated, makes no difference what your question is you'll get standard pre determined responses. I've received an e-mail stating my transaction has been cancelled due to my not providing the proper ID - in the same e-mail it says my card should not have been changed yet, even though it already has. Be careful with this one, SCAM. ShareReportSavelevel 1acmehash1 point·1 year ago I sent in almost 100 dollars. They of course wanted photos of my ID so of course I sent them. They immediately sent an email saying that they were not good enough quality try again. So I took pics of it again. Then 6 hours later then declined my payment and accused me of fraud, "called me a fraudster", but still charged my card. Your payment request has been declined. Please note that we do not disclose the reason for declined payments.This is because unfortunately we have seen these reasons being used by fraudsters to create fraudulent transactions. For your reference: Simplex payment ID: 1f577e5b-f128-4571-9573-2b18d1d32414 For any questions, please contact us by chat atsimplex.comor email at[email protected]. Please do not try to reach Simplex's support using any other method (such as social media), as you might be misled by imposters. Please always refer to your Simplex ID when contacting support. Please note that your credit card has NOT been charged. The funds have been placed on authorization hold in order to reserve the amount in case the payment was approved. Since your transaction has been declined, this authorization check will be voided. This typically takes the bank 48-72 business hours (not including Saturday or Sunday). Please let us know if you do not see the funds released after that time. Sincerely, The Simplex Team This email was automatically generated so please do not reply to it. Give AwardShareReportSavelevel 1Sooty171 point·1 year ago I am so disappointed with Simplex. I have bough ETH previously and all was fine. Now 18 days later and no sign of my 5+ ETH. I had to work out the problem - even though they confirm I bought ETH it was put on the Blockchain without the ETH code 0x!!! Their response oh it will take some time to resolve on hitBTC - they sent the wrong message....which I had to identify!!! Rating of 1 Give AwardShareReportSavelevel 1satoshiAfrica1 point·1 year ago This is discouraging. After creating an account on BTCC and undergoing a complex verification. i just landed on this post. Really difficult Give AwardShareReportSavelevel 1Sooty171 point·1 year ago After 5 weeks chasing and chasing and chasing. I have been scammed £3000 when I only wanted 1 x $1800 - do the maths. When it didn't arrive I eventually was advised it was sent by "contract" by SIMPLEX which HITBTC "were not set up for" but it would arrive in my account. SIMPLEX are HITBTC's preferred agent but take no responsibility for delivery. It would be applied to my wallet "manually". 4 weeks later I am finally advised.... Tonight I am advised that it has been applied to a wallet not related to my account. Day after day I have chased politely .... after 5 weeks I lost out on EOS and have lost my £3000. Give AwardShareReportSavelevel 1Sooty171 point·1 year ago Hi Guys, Update for Sooty17. After 38 days and over 40 emails to Simplex and HITBTC I finally have my coins! I seem to have finally gained traction through [[email protected]](mailto:[email protected]) though I have had so many explanations as to where the coins where I wont know anything conclusive. Anyway happy to get my coins at last. And keep trying!
PHP: Accessing classes -> How does '$account_info = $trading_api_sdk->doRequest(TradingApiSdkV4::METHOD_SHOW_ACCOUNT_INFO);' work?
Hi, I am trying to work with the PHP SDK (which is simply a class) from bitcoin.de (PHP SDK can be accessed here: https://codeshare.io/aJqMQn). Bitcoin.de provides an example, which shows how to use the Sdk to return an array that contains your account info. I try to understand this example: doRequest(TradingApiSdkV4::METHOD_SHOW_ACCOUNT_INFO); var_dump($account_info); This is the part that I have difficulties with: $account_info = $trading_api_sdk->doRequest(TradingApiSdkV4::METHOD_SHOW_ACCOUNT_INFO);var_dump($account_info); Basically, I create object $trading_api_sdk from class TradingApiSdkV4. I use thisobjecttoaccessfunction doRequest(), locatedinsideclass TradingApiSdkV4. doRequest() requirestwoparameters (public function doRequest(string $api_method, array $parameters = )), however, onlyoneparameterispassedin (TradingApiSdkV4::METHOD_SHOW_ACCOUNT_INFO). ThisisthefirstthingIdon'tunderstand. HowcanfunctiondoRequest() becalledwhenonly1of2parametersispassedin?Furthermore, accordingtotheclass, TradingApiSdkV4::METHOD_SHOW_ACCOUNT_INFO equals 'showAccountInfo'. Howdoespassingin'showAccountInfo'todoRequest()yielddoRequest() toreturnmyaccountinfo?Idon'tgethowitachievesthis. (Orisonenotsupposedtoseehowthisworksfromtheinfothatisprovided?)Thx for any hints! PS: thx reddit for completely shredding my formatting like five times in a row when I save the post.
You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments. The following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
Limited Supply - There will only ever be 21,000,000 bitcoins created and they are issued in a predictable fashion, you can view the inflation schedule here. Once they are all issued Bitcoin will be truly deflationary. The halving countdown can be found here.
Open source - Bitcoin code is fully auditable. You can read the source code yourself here.
Accountable - The public ledger is transparent, all transactions are seen by everyone.
Decentralized - Bitcoin is globally distributed across thousands of nodes with no single point of failure and as such can't be shut down similar to how Bittorrent works.
Censorship resistant - No one can prevent you from interacting with the bitcoin network and no one can censor, alter or block transactions that they disagree with, see Operation Chokepoint.
Push system - There are no chargebacks in bitcoin because only the person who owns the address where the bitcoins reside has the authority to move them.
Low fee - Transactions fees can vary between a few cents and a few dollars depending on network demand and how much priority you wish to assign to the transaction. Most wallets calculate the fee automatically but you can view current fees here.
Borderless - No country can stop it from going in/out, even in areas currently unserved by traditional banking as the ledger is globally distributed.
Some excellent writing on Bitcoin's value proposition and future can be found here. Bitcoin statistics can be found here, here and here. Developer resources can be found here and here. Peer-reviewed research papers can be found here. The number of times Bitcoin was declared dead by the media can be found here. Scaling resources here, and of course the whitepaper that started it all.
Where can I buy bitcoins?
BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Cashila or Bitwage. Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".
Securing your bitcoins
With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
If you prefer to "Be your own bank" and have direct control over your coins without having to use a trusted third party, there are many software wallet options here. If you want easy and secure storage without having to learn computer security best practices, then a hardware wallet such as the Trezor or Ledger is recommended. A more advanced option is to secure them yourself using paper wallets generated offline. Some popular mobile and desktop options are listed below and most are cross platform.
If you prefer to let third party "Bitcoin banks" manage your coins, try Coinbase or Xapo but be aware you may not be in control of your private keys in which case you would have to ask permission to access your funds and be exposed to third party risk.
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash. Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email! 2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out. If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.
Just like any other form of money, you can also earn bitcoins by being paid to do a job.
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)
The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
1,000 per bitcoin
SI unit for milli i.e. millilitre (mL) or millimetre (mm)
1,000,000 per bitcoin
SI unit for micro i.e microlitre (μL) or micrometre (μm)
1,000,000 per bitcoin
Colloquial "slang" term for microbitcoin
100,000,000 per bitcoin
Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $500 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki. Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval. Welcome to the Bitcoin community and the new decentralized economy!
DISCLAIMER This Whitepaper is for Era Swap Network. Its purpose is solely to provide prospective community members with information about the Era Swap Ecosystem & Era Swap Network project. This paper is for information purposes only and does not constitute and is not intended to be an offer of securities or any other financial or investment instrument in any jurisdiction. The Developers disclaim any and all responsibility and liability to any person for any loss or damage whatsoever arising directly or indirectly from (1) reliance on any information contained in this paper, (2) any error, omission or inaccuracy in any such information, or (3) any action resulting therefrom Digital Assets are extremely high-risk, speculative products. You should be aware of the risks involved and fully consider before participating in Digital assets whether it’s appropriate for you. You should only participate if you are an experienced investor with sophisticated knowledge of financial markets and you fully understand the risks associated with digital assets. We strongly advise you to take independent professional advice before making any investment or participating in any way. You should check what rules and protections apply to your respective jurisdictions before investing or participating in any way. The Creators & community will not compensate you for any losses from trading, investment or participating in any way. You should read whitepaper carefully before participating and consider whether these products are right for you. TABLE OF CONTENT · Abstract · Introduction to Era Swap Network · Development Overview · Era Swap Utility Platform · Alpha-release Development Plan · Era Swap Network Version 1: Specification · Bunch Structure: 10 · Converting ES-ERC20 to ES-Na: · Conclusion: · Era Swap Ecosystem · Social Links Abstract The early smart contracts of Era Swap Ecosystem like TimeAlly, Newly Released Tokens, Assurance, BetDeEx of Era Swap Ecosystem, are deployed on Ethereum mainnet. These smart contracts are finance-oriented (DeFi), i.e. most of the transactions are about spending or earning of Era Swap tokens which made paying the gas fees in Ether somewhat intuitive to the user (withdrawal charges in bank, paying tax while purchasing burgers) but transactions that are not token oriented like adding a nominee or appointee voting also needs Ether to be charged. As more Era Swap Token Utility platform ideas kept appending to the Era Swap Main Whitepaper, more non-financial transaction situations arise like updating status, sending a message, resolving a dispute and so on. Paying extensively for such actions all day and waiting for the transaction to be included in a block and then waiting for enough block confirmations due to potential chain re-organizations is counter-intuitive to existing free solutions like Facebook, Gmail. This is the main barrier that is stopping Web 3.0 from coming to the mainstream. As alternatives to Ethereum, there are few other smart contract development platforms that propose their own separate blockchain that features for higher transaction throughput, but they compromise on decentralization for improving transaction speeds. Moreover, the ecosystem tools are most advancing in Ethereum than any other platform due to the massive developer community. With Era Swap Network, the team aims to achieve scalability, speed and low-cost transactions for Era Swap Ecosystem (which is currently not feasible on Ethereum mainnet), without compromising much on trustless asset security for Era Swap Community users. Introduction to Era Swap Network Era Swap Network (ESN) aims to solve the above-mentioned problems faced by Era Swap Ecosystem users by building a side-blockchain on top of Ethereum blockchain using the Plasma Framework. Era Swap Network leverages the Decentralisation and Security of Ethereum and the Scalability achieved in the side-chain, this solves the distributed blockchain trilema. In most of the other blockchains, blocks are a collection of transactions and all the transactions in one block are mined by a miner in one step. Era Swap Network will consist of Bunches of Blocks of Era Swap Ecosystem Transactions. Decentralization Layer 2 Scalable and Secure A miner mines all the blocks in a bunch consequently and will commit the bunch-root to the ESN Plasma Smart Contract on Ethereum mainnet. Development Overview Initially, we will start with a simple Proof-of-Authority (PoA) based consensus of EVM to start the development and testing of Era Swap Ecosystem Smart Contracts as quickly as possible on the test-net. We will call this as an alpha-release of ESN test-net and only internal developers will work with this for developing smart contracts for Era Swap Ecosystem. User’s funds in a Plasma implementation with a simple consensus like PoA are still secured as already committed bunch-roots cannot be reversed. Eventually, we want to arrive on a more control-decentralized consensus algorithm like Proof-of-Stake (PoS) probably, so that even if the chain operator shuts down their services, a single Era Swap Ecosystem user somewhere in the world can keep the ecosystem alive by running software on their system and similarly more people can join to decentralize the control further. In this PoS version, we will modify the Parity Ethereum client in such a way, that at least 50% of transaction fees collected will go to the Luck Pool of NRT Smart Contract on Ethereum mainnet and rest can be kept by miner of the blocks/bunch of blocks if they wish. After achieving such an implementation, we will release this as a beta version to the community for testing the software on their computers with Kovan ERC20 Era Swaps (Ethereum test-net). Era Swap Decentralised Ecosystem Following platforms are to be integrated:
Era Swap Token Contract (adapted ERC20 on Ethereum) The original asset will lie on Ethereum to avoid loss due to any kind of failure in ESN.
Plasma Manager Contract (on Ethereum) To store ESN bunch headers on Ethereum.
Reverse Plasma Manager Contract (on ESN) Bridge to convert ES to ES native and ES native to ES. User deposits ES on Mainnet Plasma, gives proof on ESN and gets ES native credited to their account in a decentralised way.
NRT Manager Contract (on Ethereum or on ESN) If it is possible to send ES from an ESN contract to luck pool of NRT Manager Contract on Ethereum, then it’s ok otherwise, NRT Manager will need to be deployed on ESN for ability to add ES to luck pool.
Era Swap Wallet (React Native App for managing ESs and ES natives) Secure wallet to store multiple private keys in it, mainly for managing ES and ES native, sending ES or ES native, also for quick and easy BuzCafe payments.
TimeAlly (on Ethereum or on ESN) On whichever chain NRT Manager is deployed, TimeAlly would be deployed on the same chain.
Assurance (on Ethereum or on ESN) On whichever chain NRT Manager is deployed, TimeAlly would be deployed on the same chain.
DaySwappers (on ESN) KYC manager for platform. For easily distributing rewards to tree referees.
TimeSwappers (on ESN) Freelance market place with decentralised dispute management.
SwappersWall (on ESN) Decentralised social networking with power tokens.
BuzCafe (on ESN) Listing of shops and finding shops easily and quick payment.
BetDeEx (on ESN) Decentralised Prediction proposals, prediction and results.
DateSwappers (on ESN) Meeting ensured using cryptography.
ComputeEx (on Ethereum / centralised way) Exchange assets.
Era Swap Academy (on ESN / centralised way) Learn. Loop. Leap. How to implement ES Academy is not clear. One idea is if content is constantly being modified, then subscription expired people will only have the hash of old content while new content hash is only available to people who have done Dayswapper KYC and paid for the course. Dayswapper KYC is required because this way people won’t share their private keys to someone else.
Value of Farmers (tbd) The exchange of farming commodities produced by farmers in VoF can be deposited to warehouses where the depositors will get ERC721 equivalent tokens for their commodities (based on unique tagging).
DeGameStation (on ESN) Decentralised Gaming Station. Games in which players take turns can be written in Smart Contract. Games like Chess, Poker, 3 Patti can be developed. Users can come to DeGameStation and join an open game or start a new game and wait for other players to join.
Alpha-release Development Plan
Deploying Parity Node customized according to Era Swap Whitepaper with PoA consensus.
Setting up Plasma Smart Contracts.
Creating a bridge for ERC20 Swap from Ethereum test-net to ESN alpha test-net.
Alpha Version Era Swap Network Version 1 : Specification The Version 1 release of ESN plans to fulfill the requirements for political decentralisation and transparency in dApps of Era Swap Ecosystem using Blockchain Technology. After acquiring sufficient number of users, a version 2 construction of ESN will be feasible to enable administrative decentralization, such that the Era Swap Ecosystem will be run and managed by the Era Swap Community and will no longer require the operator to support for it's functioning. Era Swap Network (ESN) Version 1 will be a separate EVM-compatible sidechain attached to Ethereum blockchain as it’s parent chain. ESN will achieve security through Plasma Framework along with Proof-of-Authority consensus for faster finality. The idea behind plasma framework is to avoid high transaction fees and high transaction confirmation times on Ethereum mainnet by instead doing all the ecosystem transactions off-chain and only post a small information to an Ethereum Smart Contract which would represent hash of plenty of ecosystem transactions. Also, to feature movement of Era Swap Tokens from Ethereum blockchain to ESN using cryptographic proof, reverse plasma of Ethereum on ESN will be implemented. Also, submitting hash of each ESN blocks to ESN Plasma Smart Contract on Ethereum would force ESN to have a block time equal to or more than Ethereum’s 15 second time as well as it would be very much costly for operator to post lot of hashes to an Ethereum Smart Contract. This is why, merkle root of hashes of bunch of blocks would instead be submitted to ESN Plasma Smart Contact on Ethereum. Actors involved in the ESN:
Block Producer Nodes Lesser the number of nodes, quicker is the block propagation between block producers which can help quick ecosystem transactions. We find that 7 block producers hosted on different could hosting companies and locations reduces the risk of single point of failure of Era Swap Ecosystem and facilitates 100% uptime of dApps. Block Producer Nodes will also be responsible to post the small information to the Blockchain.
Block Listener Nodes Rest of the nodes will be Block Listeners which will sync new blocks produced by the block producer nodes. Plenty of public block listener nodes would be setup in various regions around the world for shorter ping time to the users of Era Swap Ecosystem. Users would submit their Era Swap Ecosystem transactions to one of these public nodes, which would relay them to rest of the Era Swap Network eventually to the block producer nodes which would finalize a new block including the user transaction.
Bunch Committers This will be an instance in the block producers which will watch for new blocks confirmed on ESN and will calculate bunch merkle roots and will submit it to ESN Plasma Smart Contract. This instance will also post hash of new Ethereum blocks to ESN (after about 10 confirmations) for moving assets between both the blockchain.
Users These will be integrating with dApps which would be connected to some public ESN nodes or they can install a block listner node themselves. They can sign and send transactions to the node which they are connected to and then that node will relay their transactions to block producer nodes who would finalise a block including their transaction.
A Bunch Structure in Smart Contract will consist of the following: • Start Block Number: It is the number of first ESN block in the bunch. • Bunch Depth: It is Merkle Tree depth of blocks in the bunch. For e.g. If bunch depth is 3, there would be 8 blocks in the bunch and if bunch depth is 10, there would be 1024 blocks in the bunch. Bunch depth of Bunches on ESN Plasma Contract is designed to be variable. During the initial phases of ESN, it would be high, for e.g. 15, to avoid ether expenditure and would be decreased in due course of time. • Transactions Mega Root: This value is the merkle root of all the transaction roots in the bunch. This is used by Smart Contract to verify that a transaction was sent on the chain. • Receipts Mega Root: This value is the merkle root of all the receipt roots in the bunch. This is used to verify that the transaction execution was successful. • Timestamp: This value is the time when the bunch proposal was submitted to the smart contract. After submission, there is a challenge period before it is finalised.
Converting ES-ERC20 to ERC-NA and BACK
On Ethereum Blockchain, the first class cryptocurrency is ETH and rest other tokens managed by smart contracts are second class. On ESN, there is an advancement to have Era Swaps as the first class cryptocurrency. This cryptocurrency will feature better user experience and to differentiate it from the classic ERC20 Era Swaps, it will be called as Era Swap Natives (ES-Na). According to the Era Swap Whitepaper, maximum 9.1 Million ES will exist which will be slowly released in circulation every month. Era Swaps will exist as ES-ERC20 as well as in form of ES-Na. One of these can be exchanged for the other at 1:1 ratio. Following is how user will convert ES-ERC20 to ES-Na:
User will give allowance to a Deposit Smart Contract, and following that call deposit method to deposit tokens to the contract.
On transaction confirmation, user will paste the transaction hash on a portal which will generate a Proof of Deposit string for the user. This string is generated by fetching all the transactions in the Ethereum Block and generating a Transaction Patricia Merkle Proof to prove that user’s transaction was indeed included in the block and the Receipts Patricia Merkle Proof to confirm that the user’s transaction was successful.
Using the same portal, user will submit the generated proofs to a Smart Contract on ESN, which would release funds to user. Though, user will have to wait for the Etheruem block roots to be posted to ESN after waiting for confirmations which would take about 3 minutes. Once, it’s done user’s proofs will be accepted and will receive exact amount of ES- Na on ESN.
Following is how user will convert ES-Na to ES-ERC20:
ES-Na being first class cryptocurrency, user will simply send ES-Na to a contract.
User will paste the transaction hash on a portal which will generate a Proof of Deposit for the user. Again ES-Na being first class cryptocurrency, Transaction Patricia Merkle Proof is enough to prove that user’s transaction was indeed included in the block. Another thing which will be generated is the block inclusion proof in the bunch.
User will have to wait for the bunch confirmation to the Plasma Smart Contract and once it’s done, user can send the proof to the Plasma Smart Contract to receive ES-ERC20.
Since the blocks are produced and transactions are validated by few block producers, it exposes a possibility for fraud by controlling the block producer nodes. Because ESN is based on the Plasma Model, when failure of sidechain occurs or the chain halts, users can hard exit their funds directly from the Plasma Smart Contract on Ethereum by giving a Proof of Holdings.
HOld ES Tokens Swapping with New ES Tokens
The old ES Tokens will be valueless as those tokens will not be accepted in ESN because of NRT (New Released Tokens) and TimeAlly contracts on mainnet which is causing high gas to users, hence reducing interactions. Also, there was an event of theft of Era Swap Tokens and after consensus from majority of holders of Era Swap Tokens; it was decided to create a new contract to reverse the theft to secure the value of Era Swap Tokens of the community. Below is the strategy for swapping tokens: TimeAlly and TSGAP: Majority of Era Swap Community have participated in TimeAlly Smart Contract in which their tokens are locked for certain period of time until which they cannot move them. Such holders will automatically receive TimeAlly staking of specific durations from the operator during initialization of ESN. Liquid Tokens: Holders of Liquid Era Swap Tokens have to transfer the old tokens to a specified Ethereum wallet address managed by team. Following that, team will audit the token source of the holder (to eliminate exchange of stolen tokens) and send new tokens back to the wallet address.
Post-Genesis Tokens Return Program
Primary asset holding of Era Swap tokens will exist on Ethereum blockchain as an ERC20 compatible standard due to the highly decentralised nature of the blockchain. Similar to how users deposit tokens to an cryptocurrency exchange for trading and then withdraw the tokens back, users will deposit tokens to ESN Contract to enter Era Swap Ecosystem and they can withdraw it back from ESN Contract for exiting from ecosystem network. The design of the token system will be such that, it will be compatible with the future shift (modification or migration of ESN version 1) to ESN version 2, in which an entirely new blockchain setup might be required. To manage liquidity, following genesis structure will be followed:
1.17 billion (Circulating Supply)
Locked in Smart Contract
7.93 billion (pending NRT releases)
Though it looks like there are 9.1 * 2 = 18.2 Billion ES, but the cryptographic design secures that at any point in time at least a total of 9.1 billion ES (ES-ERC20 + ES-Na) will be locked. To unlock ES-Na on ESN, an equal amount of ES-ERC20 has to be locked on Ethereum and vice-versa. 9.1 billion ES-ERC20 will be issued by ERC20 smart contract on Ethereum Blockchain, out of which the entire circulating supply (including liquid and TimeAlly holdings) of old ES will be received to a team wallet. TimeAlly holdings of all users will be converted to ES-Na and distributed on ESN TimeAlly Smart Contract by team to the TimeAlly holders on their same wallet address. Liquid user holdings will be sent back to the users to the wallet address from which they send back old ES tokens (because some old ES are deposited on exchange wallet address). ES-Na will be issued in the genesis block to an ESN Manager Smart Contract address. It will manage all the deposits and withdrawals as well as NRT releases.
Following are identified risks to be taken care of during the development of ESN: Network Spamming: Attackers can purchase ES from the exchange and make a lot of transactions between two accounts. This is solved by involving gas fees. A setting of 200 nanoES minimum gas price will be set, which can be changed as per convenience. DDoS: Attackers can query public nodes for computationally heavy output data. This will overload the public node with requests and genuine requests might get delayed. Block producers RPC is private, so they will continue to produce blocks. To manage user’s denial of service, the provider in dApps needs to be designed in such a way such that many public nodes will be queried simple information (let’s say latest block number) and the one which response quickly to user will be selected. AWS is down: To minimize this issue due to cloud providers down, there will be enough nodes on multiple cloud providers to ensure at least one block producer is alive. User deposit double spending: User deposits ES on Ethereum, gets ES-Na on ESN. Then the issue happens that there are re-org on ETH mainnet and the user’s transaction is reversed. Since ETH is not a fixed chain and as per PoW 51% attack can change the blocks. As Ethereum is now enough mature and by statistics forked blocks are at most of height 2. So it is safe to consider 15 confirmations. Exit Game while smooth functioning: User starts a hard exit directly from Plasma Smart Contract on Ethereum, then spends his funds from the plasma chain too. To counter this, the exit game will be disabled, only when ESN halts, i.e. fails to submit block header within the time the exit game starts. This is because it is difficult to mark user’s funds as spent on ESN. Vulnerability in Ecosystem Smart Contracts: Using traditional methods to deploy smart contracts results in a situation where if a bug is found later, it is not possible to change the code. Using a proxy construction for every ecosystem smart contract solves this problem, and changing a proxy can be given to a small committee in which 66% of votes are required, this is to prevent a malicious change of code due to compromising of a single account or similar scenario. ChainID replay attacks: Using old and traditional ways to interact with dApps can cause loss to users, hence every dApp will be audited for the same.
A simple class for making calls to Bitcoin's API using PHP. This is an old library, I suggest instead using https://github.com/denpamusic/php-bitcoinrpc Package contains class Pondol\BtcPayment\Commands\CheckPayment. This is Laravel Command and you can call it via php artisan : php artisan bitcoin:checkpayment Each time you call it, it scan for payments and confirmations on block chain. I am not sure which version of PHP brought this, but I guess that array-method is older than the 'self::method_name' string-parsing-thing. – Aleksandar Dec 18 '18 at 12:25 add a comment | Is it possible to run a function() from another .php page inside a class function and then grab results inside the class function? e.g I have a query that selects all from a table and then returns a fetch all result set. Tips for Starting with Bitcoin and Cryptocurrencies; Interview with a Pornhub Web Developer class with a constructor which receives the record array and a __call magic method which gets executed any time a class method is called. it is faster to use a set() and get() method. php will look first at all methods of your class if the method
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