64 lines
1.5 KiB
JavaScript
64 lines
1.5 KiB
JavaScript
const web3Utils = require('web3-utils')
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const { GAS_PRICE_OPTIONS, ORACLE_GAS_PRICE_SPEEDS } = require('./constants')
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const gasPriceSpeedMapper = {
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'01': ORACLE_GAS_PRICE_SPEEDS.INSTANT,
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'02': ORACLE_GAS_PRICE_SPEEDS.FAST,
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'03': ORACLE_GAS_PRICE_SPEEDS.STANDARD,
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'04': ORACLE_GAS_PRICE_SPEEDS.SLOW
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}
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function strip0x(input) {
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return input.replace(/^0x/, '')
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}
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function addTxHashToData({ encodedData, transactionHash }) {
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return encodedData.slice(0, 2) + strip0x(transactionHash) + encodedData.slice(2)
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}
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function parseAMBMessage(message) {
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message = strip0x(message)
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const txHash = `0x${message.slice(0, 64)}`
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const sender = `0x${message.slice(64, 104)}`
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const executor = `0x${message.slice(104, 144)}`
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const gasLimit = web3Utils.toBN(message.slice(144, 208))
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const dataType = message.slice(208, 210)
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let gasPrice = null
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let gasPriceSpeed = null
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let dataStart = 210
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switch (dataType) {
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case GAS_PRICE_OPTIONS.GAS_PRICE:
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gasPrice = web3Utils.toBN(message.slice(210, 274))
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dataStart += 64
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break
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case GAS_PRICE_OPTIONS.SPEED:
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gasPriceSpeed = gasPriceSpeedMapper[message.slice(210, 212)]
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dataStart += 2
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break
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case GAS_PRICE_OPTIONS.UNDEFINED:
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default:
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break
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}
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const data = `0x${message.slice(dataStart, message.length)}`
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return {
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sender,
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executor,
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txHash,
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gasLimit,
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dataType,
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gasPrice,
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gasPriceSpeed,
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data
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}
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}
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module.exports = {
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addTxHashToData,
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parseAMBMessage,
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strip0x
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}
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