53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
var typeforce = require('typeforce')
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var UINT31_MAX = Math.pow(2, 31) - 1
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function UInt31 (value) {
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return typeforce.UInt32(value) && value <= UINT31_MAX
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}
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function BIP32Path (value) {
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return typeforce.String(value) && value.match(/^(m\/)?(\d+'?\/)*\d+'?$/)
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}
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BIP32Path.toJSON = function () { return 'BIP32 derivation path' }
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var SATOSHI_MAX = 21 * 1e14
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function Satoshi (value) {
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return typeforce.UInt53(value) && value <= SATOSHI_MAX
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}
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// external dependent types
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var BigInt = typeforce.quacksLike('BigInteger')
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var ECPoint = typeforce.quacksLike('Point')
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// exposed, external API
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var ECSignature = typeforce.compile({ r: BigInt, s: BigInt })
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var Network = typeforce.compile({
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messagePrefix: typeforce.oneOf(typeforce.Buffer, typeforce.String),
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bip32: {
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public: typeforce.UInt32,
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private: typeforce.UInt32
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},
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pubKeyHash: typeforce.UInt8,
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scriptHash: typeforce.UInt8,
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wif: typeforce.UInt8
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})
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// extend typeforce types with ours
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var types = {
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BigInt: BigInt,
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BIP32Path: BIP32Path,
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Buffer256bit: typeforce.BufferN(32),
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ECPoint: ECPoint,
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ECSignature: ECSignature,
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Hash160bit: typeforce.BufferN(20),
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Hash256bit: typeforce.BufferN(32),
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Network: Network,
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Satoshi: Satoshi,
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UInt31: UInt31
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}
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for (var typeName in typeforce) {
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types[typeName] = typeforce[typeName]
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}
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module.exports = types
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