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templates: avoid hex conversions internally

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Daniel Cousens 2017-01-03 22:45:54 +11:00 • committed by Daniel Cousens
parent 9d9d101b5f
commit 33c3ed4e03
1 changed files with 5 additions and 4 deletions
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9
src/templates/witnesscommitment/output.js
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@ -1,26 +1,27 @@
// OP_RETURN 36bytes:[0xaa21a9ed, Hash256(witnessRoot )] // OP_RETURN {aa21a9ed} {commitment}
var bscript = require('../../script') var bscript = require('../../script')
var types = require('../../types') var types = require('../../types')
var typeforce = require('typeforce') var typeforce = require('typeforce')
var OPS = require('bitcoin-ops') var OPS = require('bitcoin-ops')
var HEADER = new Buffer('aa21a9ed', 'hex')
function check (script) { function check (script) {
var buffer = bscript.compile(script) var buffer = bscript.compile(script)
return buffer.length > 37 && return buffer.length > 37 &&
buffer[0] === OPS.OP_RETURN && buffer[0] === OPS.OP_RETURN &&
buffer[1] === 0x24 && buffer[1] === 0x24 &&
buffer.slice(2, 6).toString('hex') === 'aa21a9ed' buffer.slice(2, 6).equals(HEADER)
} }
check.toJSON = function () { return 'Witness commitment output' } check.toJSON = function () { return 'Witness commitment output' }
function encode (commitment) { function encode (commitment) {
// hash256 0x21 hash160 0xed
typeforce(types.Hash256bit, commitment) typeforce(types.Hash256bit, commitment)
return bscript.compile([OPS.OP_RETURN, new Buffer('aa21a9ed' + commitment.toString('hex'), 'hex')]) return bscript.compile([OPS.OP_RETURN, Buffer.concat([HEADER, commitment])])
} }
function decode (buffer) { function decode (buffer) {