Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { Bytes } from './bytes'
import { convertCidToReference, convertReferenceToCid } from './cid'
// TODO: add JSdocs for each class
const ENCODER = new TextEncoder()
export class PrivateKey extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 32)
}
publicKey(): PublicKey {
const [x, y] = Elliptic.privateKeyToPublicKey(Binary.uint256ToNumber(this.bytes, 'BE'))
return new PublicKey(Binary.concatBytes(Binary.numberToUint256(x, 'BE'), Binary.numberToUint256(y, 'BE')))
}
sign(data: Uint8Array | string): Signature {
const digest = Binary.concatBytes(
ENCODER.encode(`\x19Ethereum Signed Message:\n32`),
Binary.keccak256(data instanceof Uint8Array ? data : ENCODER.encode(data)),
)
const [r, s, v] = Elliptic.signMessage(digest, Binary.uint256ToNumber(this.bytes, 'BE'))
return new Signature(
Binary.concatBytes(Binary.numberToUint256(r, 'BE'), Binary.numberToUint256(s, 'BE'), new Uint8Array([Number(v)])),
)
}
}
export class PublicKey extends Bytes {
static readonly LENGTH = 64
constructor(bytes: Uint8Array | string | Bytes) {
const b = new Bytes(bytes)
if (b.length === 33) {
const [x, y] = Elliptic.publicKeyFromCompressed(b.toUint8Array())
super(Binary.concatBytes(Binary.numberToUint256(x, 'BE'), Binary.numberToUint256(y, 'BE')), 64)
} else {
super(bytes, 64)
}
}
address(): EthAddress {
const x = Binary.uint256ToNumber(this.bytes.slice(0, 32), 'BE')
const y = Binary.uint256ToNumber(this.bytes.slice(32, 64), 'BE')
return new EthAddress(Elliptic.publicKeyToAddress([x, y]))
}
toCompressedUint8Array(): Uint8Array {
const x = Binary.uint256ToNumber(this.bytes.slice(0, 32), 'BE')
const y = Binary.uint256ToNumber(this.bytes.slice(32, 64), 'BE')
return Elliptic.compressPublicKey([x, y])
}
toCompressedHex(): string {
return Binary.uint8ArrayToHex(this.toCompressedUint8Array())
}
}
export class EthAddress extends Bytes {
static readonly LENGTH = 20
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 20)
}
public toChecksum(): string {
return Elliptic.checksumEncode(this.bytes)
}
}
export class Identifier extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 32)
}
static fromString(value: string): Identifier {
return new Identifier(Binary.keccak256(ENCODER.encode(value)))
}
}
export class Reference extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
if (typeof bytes === 'string' && bytes.startsWith('bah5')) {
const decoded = convertCidToReference(bytes)
super(decoded.reference.bytes, 32)
} else {
super(bytes, [32, 64])
}
}
toCid(type: 'feed' | 'manifest'): string {
return convertReferenceToCid(this.bytes, type)
}
static isValid(value: string): boolean {
try {
new Reference(value)
return true
} catch {
return false
}
}
}
export class TransactionId extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 32)
}
}
export class Span extends Bytes {
static readonly LENGTH = 8
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 8)
}
static fromBigInt(number: bigint): Span {
return new Span(Binary.numberToUint64(number, 'LE'))
}
toBigInt(): bigint {
return Binary.uint64ToNumber(this.bytes, 'LE')
}
static fromSlice(bytes: Uint8Array, start: number): Span {
return new Span(bytes.slice(start, start + Span.LENGTH))
}
}
export class PeerAddress extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 32)
}
}
export class BatchId extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 32)
}
}
export class Signature extends Bytes {
static readonly LENGTH = 65
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 65)
}
static fromSlice(bytes: Uint8Array, start: number): Signature {
return new Signature(bytes.slice(start, start + Signature.LENGTH))
}
recoverPublicKey(digest: Uint8Array | string): PublicKey {
const r = Binary.uint256ToNumber(this.bytes.slice(0, 32), 'BE')
const s = Binary.uint256ToNumber(this.bytes.slice(32, 64), 'BE')
const v = BigInt(this.bytes[64]) as 27n | 28n
const [x, y] = Elliptic.recoverPublicKey(
Binary.concatBytes(
ENCODER.encode(`\x19Ethereum Signed Message:\n32`),
Binary.keccak256(digest instanceof Uint8Array ? digest : ENCODER.encode(digest)),
),
r,
s,
v,
)
return new PublicKey(Binary.concatBytes(Binary.numberToUint256(x, 'BE'), Binary.numberToUint256(y, 'BE')))
}
isValid(digest: Uint8Array | string, expectedAddress: EthAddress | Uint8Array | string): boolean {
const publicKey = this.recoverPublicKey(digest)
const address = publicKey.address()
return address.equals(expectedAddress)
}
}
export class Topic extends Bytes {
static readonly LENGTH = 32
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 32)
}
static fromString(value: string): Topic {
return new Topic(Binary.keccak256(ENCODER.encode(value)))
}
}
const MAX_UINT64 = new Uint8Array(8).fill(0xff, 0, 8)
export class FeedIndex extends Bytes {
static readonly LENGTH = 8
static readonly MINUS_ONE = new FeedIndex(MAX_UINT64)
constructor(bytes: Uint8Array | string | Bytes) {
super(bytes, 8)
}
static fromBigInt(number: bigint): FeedIndex {
return new FeedIndex(Binary.numberToUint64(number, 'BE'))
}
toBigInt(): bigint {
return Binary.uint64ToNumber(this.bytes, 'BE')
}
next(): FeedIndex {
if (Binary.equals(this.bytes, MAX_UINT64)) {
return FeedIndex.fromBigInt(0n)
}
return FeedIndex.fromBigInt(this.toBigInt() + 1n)
}
}
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