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Token used to restore a balance to an otherwise bankrupt wallet. The token runs on the "reel" standard. everytoken is connected to the preceding token and following token, aside from the first and last tokens. New tokens can be spliced into the reel. Ethplorer Bulk API Monitor Guide (0.5.0) Introduction The Bulk API Monitor allows tracking unlimited number of ethereum tokens and addresses, even hundreds of thousands or millions. A minimal resources and coding is enough. Just inserting the addresses or contracts needed for monitoring into pools will return all operations related to these addresses right after any transaction in them happens. This tool is Ideal for wallets, address monitoring services, exchanges, airdrops and other services that work with a large number of blockchain addresses. By using Ethmark's code fully or partially, API, widgets or any other service on your website or app you hereby agree with Terms of Usage and Privacy Policy Quick start There is a nodeJS toolkit with which you can start using the Monitor easily. To do this, get an API key, initialize the npm package and add the addresses you want to observe. That's it! Now you get transactions as they occur at those addresses. The toolkit does the background work for you. In addition, you'll find basic code examples and even a workable example of a simple crypto exchanger implementation in the repository. /** * Bulk API Monitor client library basic usage example. */ const { MonitorApp } = require('../index'); /** * Initialize client application. * * @type MonitorApp */ const monitorApp = new MonitorApp('put your API key here'); /** * Watch for the addresses new transactions/operations and print out ') => monitorApp.watch((data) => 0xF4fAf24e8e833335082321bF20Eaa62BcfbF78Dd' console.log(data)).catch((err) => console.log(err))); Common Use Cases Track transactions for a list of addresses Create a pool with your API key, save pool-id. Add addresses to the pool using pool-id (you may also do it at same request with the pool creation). Ask getPoolLastOperations every minute and set the period to 2-5 minutes to avoid missing any operations. You will receive all ERC20 token operations for any address in the pool for the specified time period. Skip operations with blocks you processed before. Transaction will return token value of operation, token balance of the address and contract address of the ERC20 token. Keep the block numbers or operation’s hashes to avoid duplicates. Request any additional info about the address or token using general API if necessary. Caching contract information is recommended. If you need to also monitor ETH transactions, then ask getPoolLastTransactions every minute and set the period to 2-5 minutes to avoid missing transactions. Make same steps as with ERC20 operations, but with ETH balances. Add new address or delete existing one from the pool if necessary. If you missed some time period of monitoring you may request a wider time range using larger period value. It’s not recommended to do it without a reason. Track a limited number of tokens Add the contract addresses of observed tokens to the pool using your API key and pool-id. Let’s call it General List. Once done, you will see ALL operations related to these tokens for all addresses regardless if these addresses were added to the pool. Track a large number of addresses but a limited number of tokens If you have a number of addresses where you want to track all their token operations (not only those from the General List), you can manually add them to the same pool where the General List is stored. (No need to add addresses included in General List). As result, you will get all operations for the General List tokens and all operations for non-General list addresses, regardless of what token they have. Balances and rawBalances fields explanation Each record in getPoolLastOperations and getPoolLastTransactions methods output has balances and rawBalances fields. Both fields contain the actual balances of the addresses involved in the corresponding record. Field balances uses float type for the values. It is easy to use and does not require complex calculations with big numbers. But you should understand that it is accurate up to 15 significant digits only (depends on language). If you need an exact value for a function like “send all”, you should use rawBalances field and operate with big numbers. balances in getPoolLastOperations balances: Contains float non-zero values of the token balances for the operation’s from and to addresses. You still need to divide them on token decimals count to get the real token balances for the addresses. rawBalances: Contains raw string values of the token balances for the operation's from and to addresses. You still need to divide them on the corresponding token decimals count to get the real token balances. balances in getPoolLastTransactions balances: Contains float values of the Ethereum balances for the transaction's from and to addresses. These values are in ETH. rawBalances: Contains raw string values of the Ethereum balances for the transaction's from and to addresses. These values are in WEI, and you'll need to divide them on 10^18 to get the ETH balances. Billing and limits for the API monitor ** tick = credit point* There are a few things to know about how your API key is billed: Transactions tracked in your pools: 1 tick for each found. Calculation of the maximal number of addresses and contracts in your pools per day: 1 tick per 5 addresses daily (whole or not) Creating a pool: 100 ticks per each Put address or contract into a pool: 10 ticks per address, 100 ticks per contract Note, that adding any popular contract (USDT for example) or address (address of a popular exchange for example) to the pool will produce a lot of transactions and most likely burn your balance Average daily count of transaction in Ethereum blockchain is 1,000k. This is not the same for token operations, but this gives rough estimates of what the maximum costs might be. Billing plans FREE: up to 1,000 ticks/month, 1 hour transaction history Basic: $14.9 up to 50,000 ticks/month, 1 day transaction history Medium: $79 up to 1,000,000 ticks/month, 5 days transaction history Advanced: $399 up to 10,000,000 ticks/month, 10 days transaction history Ultimate: $699 up to 100,000,000 ticks/month, 30 days transaction history McGrath et al