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97 lines
3.1 KiB
97 lines
3.1 KiB
var Buffer = require('safe-buffer').Buffer
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var bech32 = require('bech32')
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var bs58check = require('bs58check')
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var bscript = require('./script')
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var btemplates = require('./templates')
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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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// TODO: 4.0.0, move to "toOutputScript"
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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.readUInt8(0)
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var hash = payload.slice(1)
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return { version: version, hash: hash }
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}
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function fromBech32 (address) {
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var result = bech32.decode(address)
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var data = bech32.fromWords(result.words.slice(1))
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return {
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version: result.words[0],
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prefix: result.prefix,
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data: Buffer.from(data)
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}
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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 = Buffer.allocUnsafe(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 toBech32 (data, version, prefix) {
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var words = bech32.toWords(data)
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words.unshift(version)
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return bech32.encode(prefix, words)
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}
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function fromOutputScript (outputScript, network) {
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network = network || networks.bitcoin
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if (btemplates.pubKeyHash.output.check(outputScript)) return toBase58Check(bscript.compile(outputScript).slice(3, 23), network.pubKeyHash)
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if (btemplates.scriptHash.output.check(outputScript)) return toBase58Check(bscript.compile(outputScript).slice(2, 22), network.scriptHash)
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if (btemplates.witnessPubKeyHash.output.check(outputScript)) return toBech32(bscript.compile(outputScript).slice(2, 22), 0, network.bech32)
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if (btemplates.witnessScriptHash.output.check(outputScript)) return toBech32(bscript.compile(outputScript).slice(2, 34), 0, network.bech32)
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throw new Error(bscript.toASM(outputScript) + ' has no matching Address')
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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
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try {
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decode = fromBase58Check(address)
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} catch (e) {}
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if (decode) {
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if (decode.version === network.pubKeyHash) return btemplates.pubKeyHash.output.encode(decode.hash)
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if (decode.version === network.scriptHash) return btemplates.scriptHash.output.encode(decode.hash)
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} else {
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try {
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decode = fromBech32(address)
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} catch (e) {}
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if (decode) {
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if (decode.prefix !== network.bech32) throw new Error(address + ' has an invalid prefix')
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if (decode.version === 0) {
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if (decode.data.length === 20) return btemplates.witnessPubKeyHash.output.encode(decode.data)
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if (decode.data.length === 32) return btemplates.witnessScriptHash.output.encode(decode.data)
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}
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}
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}
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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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fromBech32: fromBech32,
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fromOutputScript: fromOutputScript,
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toBase58Check: toBase58Check,
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toBech32: toBech32,
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toOutputScript: toOutputScript
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}
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