Frontend Review MCP

var assert = require('assert') var bitcoin = require('bitcoinjs-lib') var toAtom = require('./convert').toAtom function preCreateTx(to, value, network) { var error var maxValue = 8500000000000000 if (value >= maxValue) { var error = new Error('Amount too high. You need to send this amount in smaller parts.') error.details = 'Integer overflow' throw error } try { var address = bitcoin.address.fromBase58Check(to) assert(address.version === network.pubKeyHash || address.version === network.scriptHash, 'Invalid address version prefix') } catch (e) { error = new Error('Invalid address') error.details = e.message throw error } if (value <= network.dustThreshold) { error = new Error('Invalid value') error.details = 'Not above dust threshold' error.dustThreshold = network.dustThreshold throw error } } function postCreateTx(value, has, hasIncludingZeroConf, fee) { var needed = value + fee if (has < needed) { var error = new Error('Insufficient funds') if (hasIncludingZeroConf >= needed) { error.details = 'Additional funds confirmation pending' } else if (hasIncludingZeroConf >= value) { error.details = 'Attempt to empty wallet' error.sendableBalance = hasIncludingZeroConf - fee } throw error } } function utxos(utxos) { assert(Array.isArray(utxos), 'Expect utxos to be an array') utxos.forEach(function(unspent) { assert(unspent.txId != null && typeof unspent.txId === 'string', 'Expect every utxo has a txId field (string)') assert(unspent.address != null && typeof unspent.address === 'string', 'Expect every utxo has an address field (string)') assert(unspent.value != null && typeof unspent.value === 'number', 'Expect every utxo has an value field (number)') assert(unspent.vout != null && typeof unspent.vout === 'number', 'Expect every utxo has a vout field (number)') assert(unspent.confirmations != null && typeof unspent.confirmations === 'number', 'Expect every utxo has a confirmations field (number)') }) } module.exports = { preCreateTx: preCreateTx, postCreateTx: postCreateTx, utxos: utxos }