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53 lines
1.6 KiB
53 lines
1.6 KiB
var bs58check = require('bs58check')
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var bscript = require('./script')
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var networks = require('./networks')
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var typeforce = require('typeforce')
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var types = require('./types')
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function fromBase58Check (address) {
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var payload = bs58check.decode(address)
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if (payload.length < 21) throw new TypeError(address + ' is too short')
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if (payload.length > 21) throw new TypeError(address + ' is too long')
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var version = payload[0]
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var hash = payload.slice(1)
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return { hash: hash, version: version }
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}
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function fromOutputScript (scriptPubKey, network) {
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network = network || networks.bitcoin
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var chunks = bscript.decompile(scriptPubKey)
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if (bscript.isPubKeyHashOutput(chunks)) return toBase58Check(chunks[2], network.pubKeyHash)
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if (bscript.isScriptHashOutput(chunks)) return toBase58Check(chunks[1], network.scriptHash)
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throw new Error(bscript.toASM(chunks) + ' has no matching Address')
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}
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function toBase58Check (hash, version) {
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typeforce(types.tuple(types.Hash160bit, types.UInt8), arguments)
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var payload = new Buffer(21)
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payload.writeUInt8(version, 0)
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hash.copy(payload, 1)
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return bs58check.encode(payload)
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}
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function toOutputScript (address, network) {
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network = network || networks.bitcoin
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var decode = fromBase58Check(address)
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if (decode.version === network.pubKeyHash) return bscript.pubKeyHashOutput(decode.hash)
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if (decode.version === network.scriptHash) return bscript.scriptHashOutput(decode.hash)
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throw new Error(address + ' has no matching Script')
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}
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module.exports = {
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fromBase58Check: fromBase58Check,
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fromOutputScript: fromOutputScript,
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toBase58Check: toBase58Check,
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toOutputScript: toOutputScript
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}
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