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feat: add createProgramAddress

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This commit is contained in:
Jack May
2020-05-26 17:46:49 -07:00
committed by Michael Vines
parent 85c68bc953
commit a29e088169
2 changed files with 59 additions and 1 deletions
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23
web3.js/src/publickey.js
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@@ -78,7 +78,7 @@ export class PublicKey {
}
/**
* Derive a public key from another key, a seed, and a programId.
* Derive a public key from another key, a seed, and a program ID.
*/
static async createWithSeed(
fromPublicKey: PublicKey,
@@ -93,4 +93,25 @@ export class PublicKey {
const hash = await sha256(new Uint8Array(buffer));
return new PublicKey('0x' + hash);
}
/**
* Derive a program address from seeds and a program ID.
*/
static async createProgramAddress(
seeds: Array<string>,
programId: PublicKey,
): Promise<PublicKey> {
let buffer = Buffer.alloc(0);
seeds.forEach(function (seed) {
buffer = Buffer.concat([buffer, Buffer.from(seed)]);
});
buffer = Buffer.concat([
buffer,
programId.toBuffer(),
Buffer.from('ProgramDerivedAddress'),
]);
let hash = await sha256(new Uint8Array(buffer));
hash = await sha256(new Uint8Array(new BN(hash, 16).toBuffer()));
return new PublicKey('0x' + hash);
}
}