55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
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// OP_0 [signatures ...]
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var bscript = require('../../script')
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var typeforce = require('typeforce')
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var OPS = require('../../opcodes.json')
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function partialSignature (value) {
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return value === OPS.OP_0 || bscript.isCanonicalSignature(value)
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}
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function check (script, allowIncomplete) {
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var chunks = bscript.decompile(script)
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if (chunks.length < 2) return false
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if (chunks[0] !== OPS.OP_0) return false
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if (allowIncomplete) {
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return chunks.slice(1).every(partialSignature)
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}
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return chunks.slice(1).every(bscript.isCanonicalSignature)
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}
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function encode (signatures, scriptPubKey) {
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typeforce([partialSignature], signatures)
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if (scriptPubKey) {
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var scriptData = bscript.multisig.output.decode(scriptPubKey)
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if (signatures.length < scriptData.m) {
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throw new TypeError('Not enough signatures provided')
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}
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if (signatures.length > scriptData.pubKeys.length) {
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throw new TypeError('Too many signatures provided')
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}
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}
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return bscript.compile([].concat(OPS.OP_0, signatures))
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}
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function decode (buffer, allowIncomplete) {
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var chunks = bscript.decompile(buffer)
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typeforce(check, chunks, allowIncomplete)
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return {
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signatures: chunks.slice(1)
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}
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}
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module.exports = {
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check: check,
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decode: decode,
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encode: encode
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}
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