tx-manager/src/TxManager.js

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const ethers = require('ethers')
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const { Mutex } = require('async-mutex')
const { GasPriceOracle } = require('gas-price-oracle')
const Transaction = require('./Transaction')
const defaultConfig = {
MAX_RETRIES: 10,
GAS_BUMP_PERCENTAGE: 5,
MIN_GWEI_BUMP: 1,
GAS_BUMP_INTERVAL: 1000 * 60 * 5,
MAX_GAS_PRICE: 1000,
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GAS_LIMIT_MULTIPLIER: 1.1,
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POLL_INTERVAL: 5000,
CONFIRMATIONS: 8,
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ESTIMATE_GAS: true,
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THROW_ON_REVERT: true,
BLOCK_GAS_LIMIT: null,
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}
class TxManager {
constructor({ privateKey, rpcUrl, broadcastNodes = [], config = {} }) {
this.config = Object.assign({ ...defaultConfig }, config)
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this._privateKey = privateKey.startsWith('0x') ? privateKey : '0x' + privateKey
this._provider = new ethers.providers.JsonRpcProvider(rpcUrl)
this._wallet = new ethers.Wallet(this._privateKey, this._provider)
this.address = this._wallet.address
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this._broadcastNodes = broadcastNodes
this._gasPriceOracle = new GasPriceOracle({ defaultRpc: rpcUrl })
this._mutex = new Mutex()
this._nonce = null
}
/**
* Creates Transaction class instance.
*
* @param tx Transaction to send
*/
createTx(tx) {
return new Transaction(tx, this)
}
}
module.exports = TxManager