55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
import { Payment, PaymentOpts } from './index' // eslint-disable-line
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import * as bscript from '../script'
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import * as lazy from './lazy'
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import { bitcoin as BITCOIN_NETWORK } from '../networks'
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const typef = require('typeforce')
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const OPS = bscript.OPS
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function stacksEqual (a: Array<Buffer>, b: Array<Buffer>): boolean {
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if (a.length !== b.length) return false
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return a.every(function (x, i) {
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return x.equals(b[i])
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})
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}
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// output: OP_RETURN ...
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export function p2data (a: Payment, opts?: PaymentOpts): Payment {
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if (
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!a.data &&
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!a.output
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) throw new TypeError('Not enough data')
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opts = Object.assign({ validate: true }, opts || {})
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typef({
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network: typef.maybe(typef.Object),
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output: typef.maybe(typef.Buffer),
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data: typef.maybe(typef.arrayOf(typef.Buffer))
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}, a)
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const network = a.network || BITCOIN_NETWORK
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const o = <Payment>{ network }
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lazy.prop(o, 'output', function () {
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if (!a.data) return
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return bscript.compile((<Array<Buffer | number>>[OPS.OP_RETURN]).concat(a.data))
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})
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lazy.prop(o, 'data', function () {
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if (!a.output) return
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return (<Array<Buffer | number>>bscript.decompile(a.output)).slice(1)
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})
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// extended validation
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if (opts.validate) {
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if (a.output) {
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const chunks = bscript.decompile(a.output)
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if ((<Array<Buffer | number>>chunks)[0] !== OPS.OP_RETURN) throw new TypeError('Output is invalid')
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if (!(<Array<Buffer | number>>chunks).slice(1).every(typef.Buffer)) throw new TypeError('Output is invalid')
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if (a.data && !stacksEqual(a.data, <Array<Buffer>>o.data)) throw new TypeError('Data mismatch')
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}
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}
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return Object.assign(o, a)
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}
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