73 lines
1.8 KiB
JavaScript
73 lines
1.8 KiB
JavaScript
var typeforce = require('typeforce')
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function nBuffer (value, n) {
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typeforce(types.Buffer, value)
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if (value.length !== n) throw new typeforce.TfTypeError('Expected ' + (n * 8) + '-bit Buffer, got ' + (value.length * 8) + '-bit Buffer')
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return true
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}
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function Hash160bit (value) { return nBuffer(value, 20) }
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function Hash256bit (value) { return nBuffer(value, 32) }
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function Buffer256bit (value) { return nBuffer(value, 32) }
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var UINT53_MAX = Math.pow(2, 53) - 1
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var UINT31_MAX = Math.pow(2, 31) - 1
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function UInt2 (value) { return (value & 3) === value }
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function UInt8 (value) { return (value & 0xff) === value }
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function UInt32 (value) { return (value >>> 0) === value }
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function UInt31 (value) {
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return UInt32(value) && value <= UINT31_MAX
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}
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function UInt53 (value) {
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return typeforce.Number(value) &&
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value >= 0 &&
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value <= UINT53_MAX &&
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Math.floor(value) === value
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}
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function Bip32Path (value) {
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return typeforce.String(value) &&
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value.match(/^(m\/)?(\d+'?\/)*\d+'?$/)
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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: UInt32,
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private: UInt32
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},
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pubKeyHash: UInt8,
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scriptHash: UInt8,
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wif: UInt8,
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dustThreshold: UInt53
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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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Buffer256bit: Buffer256bit,
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ECPoint: ECPoint,
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ECSignature: ECSignature,
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Hash160bit: Hash160bit,
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Hash256bit: Hash256bit,
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Network: Network,
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UInt2: UInt2,
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UInt8: UInt8,
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UInt31: UInt31,
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UInt32: UInt32,
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UInt53: UInt53,
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Bip32Path: Bip32Path
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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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