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Add Secp256k1Wallet.generate

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This commit is contained in:
Simon Warta 2020-07-22 08:40:16 +02:00
parent 2a47d8b580
commit 57914c2a61
3 changed files with 45 additions and 0 deletions
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15
packages/sdk38/src/wallet.spec.ts
View File

@ -18,6 +18,21 @@ describe("Secp256k1Wallet", () => {
});
});
describe("generate", () => {
it("defaults to 12 words", async () => {
const wallet = await Secp256k1Wallet.generate();
expect(wallet.mnemonic.split(" ").length).toEqual(12);
});
it("can use different mnemonic lengths", async () => {
expect((await Secp256k1Wallet.generate(12)).mnemonic.split(" ").length).toEqual(12);
expect((await Secp256k1Wallet.generate(15)).mnemonic.split(" ").length).toEqual(15);
expect((await Secp256k1Wallet.generate(18)).mnemonic.split(" ").length).toEqual(18);
expect((await Secp256k1Wallet.generate(21)).mnemonic.split(" ").length).toEqual(21);
expect((await Secp256k1Wallet.generate(24)).mnemonic.split(" ").length).toEqual(24);
});
});
describe("getAccounts", () => {
it("resolves to a list of accounts if enabled", async () => {
const wallet = await Secp256k1Wallet.fromMnemonic(defaultMnemonic);

18
packages/sdk38/src/wallet.ts
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@ -1,6 +1,7 @@
import {
Bip39,
EnglishMnemonic,
Random,
Secp256k1,
Sha256,
Sha512,
@ -76,6 +77,23 @@ export class Secp256k1Wallet implements OfflineSigner {
return new Secp256k1Wallet(mnemonic, privkey, Secp256k1.compressPubkey(uncompressed), prefix);
}
/**
* Generates a new wallet with a BIP39 mnemonic of the given length.
*
* @param length The number of words in the mnemonic (12, 15, 18, 21 or 24).
* @param hdPath The BIP-32/SLIP-10 derivation path. Defaults to the Cosmos Hub/ATOM path `m/44'/118'/0'/0/0`.
* @param prefix The bech32 address prefix (human readable part). Defaults to "cosmos".
*/
public static async generate(
length: 12 | 15 | 18 | 21 | 24 = 12,
hdPath: readonly Slip10RawIndex[] = makeCosmoshubPath(0),
prefix = "cosmos",
): Promise<Secp256k1Wallet> {
const entropyLength = 4 * Math.floor((11 * length) / 33);
const entropy = Random.getBytes(entropyLength);
const mnemonic = Bip39.encode(entropy);
return Secp256k1Wallet.fromMnemonic(mnemonic.toString(), hdPath, prefix);
}
private readonly mnemonicData: EnglishMnemonic;
private readonly pubkey: Uint8Array;

12
packages/sdk38/types/wallet.d.ts vendored
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@ -28,6 +28,18 @@ export declare class Secp256k1Wallet implements OfflineSigner {
hdPath?: readonly Slip10RawIndex[],
prefix?: string,
): Promise<Secp256k1Wallet>;
/**
* Generates a new wallet with a BIP39 mnemonic of the given length.
*
* @param length The number of words in the mnemonic (12, 15, 18, 21 or 24).
* @param hdPath The BIP-32/SLIP-10 derivation path. Defaults to the Cosmos Hub/ATOM path `m/44'/118'/0'/0/0`.
* @param prefix The bech32 address prefix (human readable part). Defaults to "cosmos".
*/
static generate(
length?: 12 | 15 | 18 | 21 | 24,
hdPath?: readonly Slip10RawIndex[],
prefix?: string,
): Promise<Secp256k1Wallet>;
private readonly mnemonicData;
private readonly pubkey;
private readonly privkey;