Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | 1x 55x 21x 34x 11x 11x 11x 11x 11x 11x 11x 11x 11x 23x 23x 23x 23x 23x 23x 23x 23x 9x 9x 1x 1x 1x 1x 1x 1x 1x 1x 8x 43x 43x 2x 2x 3x 3x 3x 3x 4x 4x 4x 27x 9x 9x 26x | import {ABIDecoder} from '../serializer/decoder'
import {ABIEncoder} from '../serializer/encoder'
import {ABISerializableObject} from '../serializer/serializable'
import {Base58} from '../base58'
import {isInstanceOf} from '../utils'
import {recover} from '../crypto/recover'
import {verify} from '../crypto/verify'
import {Bytes, BytesType, Checksum256, Checksum256Type, KeyType, PublicKey} from '../'
export type SignatureType =
| Signature
| string
| {type: string; r: Uint8Array; s: Uint8Array; recid: number}
export class Signature implements ABISerializableObject {
static abiName = 'signature'
/** Type, e.g. `K1` */
type: KeyType
/** Signature data. */
data: Bytes
/** Create Signature object from representing types. */
static from(value: SignatureType) {
if (isInstanceOf(value, Signature)) {
return value
}
if (typeof value === 'object' && value.r && value.s) {
const data = new Uint8Array(1 + 32 + 32)
let recid = value.recid
const type = KeyType.from(value.type)
Eif (value.type === KeyType.K1 || value.type === KeyType.R1) {
recid += 31
}
data[0] = recid
data.set(value.r, 1)
data.set(value.s, 33)
return new Signature(type, new Bytes(data))
}
Iif (typeof value !== 'string') {
throw new Error('Invalid signature')
}
Eif (value.startsWith('SIG_')) {
const parts = value.split('_')
Iif (parts.length !== 3) {
throw new Error('Invalid signature string')
}
const type = KeyType.from(parts[1])
const size = type === KeyType.K1 || type === KeyType.R1 ? 65 : undefined
const data = Base58.decodeRipemd160Check(parts[2], size, type)
return new Signature(type, data)
} else {
throw new Error('Invalid signature string')
}
}
/** @internal */
static fromABI(decoder: ABIDecoder) {
const type = KeyType.from(decoder.readByte())
if (type === KeyType.WA) {
const startPos = decoder.getPosition()
decoder.advance(65) // compact_signature
decoder.advance(decoder.readVaruint32()) // auth_data
decoder.advance(decoder.readVaruint32()) // client_json
const len = decoder.getPosition() - startPos
decoder.setPosition(startPos)
const data = Bytes.from(decoder.readArray(len))
return new Signature(KeyType.WA, data)
}
return new Signature(type, new Bytes(decoder.readArray(65)))
}
/** @internal */
constructor(type: KeyType, data: Bytes) {
this.type = type
this.data = data
}
equals(other: SignatureType) {
const otherSig = Signature.from(other)
return this.type === otherSig.type && this.data.equals(otherSig.data)
}
/** Recover public key from given message digest. */
recoverDigest(digest: Checksum256Type) {
digest = Checksum256.from(digest)
const compressed = recover(this.data.array, digest.array, this.type)
return PublicKey.from({compressed, type: this.type})
}
/** Recover public key from given message. */
recoverMessage(message: BytesType) {
return this.recoverDigest(Checksum256.hash(message))
}
/** Verify this signature with given message digest and public key. */
verifyDigest(digest: Checksum256Type, publicKey: PublicKey) {
digest = Checksum256.from(digest)
return verify(this.data.array, digest.array, publicKey.data.array, this.type)
}
/** Verify this signature with given message and public key. */
verifyMessage(message: BytesType, publicKey: PublicKey) {
return this.verifyDigest(Checksum256.hash(message), publicKey)
}
/** Base58check encoded string representation of this signature (`SIG_<type>_<data>`). */
toString() {
return `SIG_${this.type}_${Base58.encodeRipemd160Check(this.data, this.type)}`
}
/** @internal */
toABI(encoder: ABIEncoder) {
encoder.writeByte(KeyType.indexFor(this.type))
encoder.writeArray(this.data.array)
}
/** @internal */
toJSON() {
return this.toString()
}
}
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