Move fee estimation into networks.js
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79ec61d085
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3 changed files with 36 additions and 5 deletions
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@ -1,6 +1,11 @@
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// https://en.bitcoin.it/wiki/List_of_address_prefixes
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// Dogecoin BIP32 is a proposed standard: https://bitcointalk.org/index.php?topic=409731
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module.exports = {
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function bitcoinEstimateFee(txByteSize) {
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return networks.bitcoin.feePerKb * Math.ceil(txByteSize / 1000)
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}
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var networks = {
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bitcoin: {
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magicPrefix: '\x18Bitcoin Signed Message:\n',
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bip32: {
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@ -10,8 +15,9 @@ module.exports = {
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pubKeyHash: 0x00,
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scriptHash: 0x05,
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wif: 0x80,
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dustThreshold: 546,
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feePerKb: 10000
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dustThreshold: 546, // https://github.com/bitcoin/bitcoin/blob/529047fcd18acd1b64dc95d6eb69edeaad75d405/src/core.h#L176-L188
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feePerKb: 10000, // https://github.com/bitcoin/bitcoin/blob/3f39b9d4551d729c3a2e4decd810ac6887cfaeb3/src/main.cpp#L52
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estimateFee: bitcoinEstimateFee
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},
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dogecoin: {
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magicPrefix: '\x19Dogecoin Signed Message:\n',
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@ -47,6 +53,8 @@ module.exports = {
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scriptHash: 0xc4,
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wif: 0xef,
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dustThreshold: 546,
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feePerKb: 10000
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feePerKb: 10000,
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estimateFee: bitcoinEstimateFee
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}
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}
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module.exports = networks
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@ -237,7 +237,7 @@ function Wallet(seed, network) {
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tmpTx.addOutput(getChangeAddress(), 0)
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var byteSize = tmpTx.toBuffer().length
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return network.feePerKb * Math.ceil(byteSize / 1000)
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return network.estimateFee(byteSize)
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}
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function getChangeAddress() {
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23
test/network.js
Normal file
23
test/network.js
Normal file
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@ -0,0 +1,23 @@
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var assert = require('assert')
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var networks = require('../src/networks')
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var Transaction = require('../src/transaction')
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var fixtureTxes = require('./fixtures/mainnet_tx')
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var fixtureTx1Hex = fixtureTxes.prevTx
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var fixtureTxBigHex = fixtureTxes.bigTx
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describe('bitcoin', function() {
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describe('estimateFee', function() {
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var estimateFee = networks.bitcoin.estimateFee
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it('works for fixture tx 1', function() {
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var tx = Transaction.fromHex(fixtureTx1Hex)
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assert.equal(estimateFee(tx.toBuffer().length), 10000)
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})
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it('works for fixture big tx', function() {
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var tx = Transaction.fromHex(fixtureTxBigHex)
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assert.equal(estimateFee(tx.toBuffer().length), 30000)
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})
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})
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})
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