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6655e35 | 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 | import {generateKeypair, getPublicKey, Ed25519Keypair} from './utils/ed25519';
import {PublicKey} from './publickey';
/**
* Keypair signer interface
*/
export interface Signer {
publicKey: PublicKey;
secretKey: Uint8Array;
}
/**
* An account keypair used for signing transactions.
*/
export class Keypair {
private _keypair: Ed25519Keypair;
/**
* Create a new keypair instance.
* Generate random keypair if no {@link Ed25519Keypair} is provided.
*
* @param {Ed25519Keypair} keypair ed25519 keypair
*/
constructor(keypair?: Ed25519Keypair) {
this._keypair = keypair ?? generateKeypair();
}
/**
* Generate a new random keypair
*
* @returns {Keypair} Keypair
*/
static generate(): Keypair {
return new Keypair(generateKeypair());
}
/**
* Create a keypair from a raw secret key byte array.
*
* This method should only be used to recreate a keypair from a previously
* generated secret key. Generating keypairs from a random seed should be done
* with the {@link Keypair.fromSeed} method.
*
* @throws error if the provided secret key is invalid and validation is not skipped.
*
* @param secretKey secret key byte array
* @param options skip secret key validation
*
* @returns {Keypair} Keypair
*/
static fromSecretKey(
secretKey: Uint8Array,
options?: {skipValidation?: boolean},
): Keypair {
if (secretKey.byteLength !== 64) {
throw new Error('bad secret key size');
}
const publicKey = secretKey.slice(32, 64);
if (!options || !options.skipValidation) {
const privateScalar = secretKey.slice(0, 32);
const computedPublicKey = getPublicKey(privateScalar);
for (let ii = 0; ii < 32; ii++) {
if (publicKey[ii] !== computedPublicKey[ii]) {
throw new Error('provided secretKey is invalid');
}
}
}
return new Keypair({publicKey, secretKey});
}
/**
* Generate a keypair from a 32 byte seed.
*
* @param seed seed byte array
*
* @returns {Keypair} Keypair
*/
static fromSeed(seed: Uint8Array): Keypair {
const publicKey = getPublicKey(seed);
const secretKey = new Uint8Array(64);
secretKey.set(seed);
secretKey.set(publicKey, 32);
return new Keypair({publicKey, secretKey});
}
/**
* The public key for this keypair
*
* @returns {PublicKey} PublicKey
*/
get publicKey(): PublicKey {
return new PublicKey(this._keypair.publicKey);
}
/**
* The raw secret key for this keypair
* @returns {Uint8Array} Secret key in an array of Uint8 bytes
*/
get secretKey(): Uint8Array {
return new Uint8Array(this._keypair.secretKey);
}
}
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