Sign

Please refer to the Session creation section to learn how to create a new session.

Full example

ECDSA

App.tsx

import { type EcdsaSession } from '@silencelaboratories/silent-shard-sdk';

// This could be a hash digest of any message you want to sign.
// For example, for the Ethereum transaction signing, you would use the keccak256 hash of the transaction data.
const messageHash = 'e2a159d17b7bb714aed7675d7c7d394dec8d2e4337842848104694bf89c71c03';

export const signGen = async (session: EcdsaSession) => {
  // Creating a new keyshare for demo purpose. In real application, you can use an existing keyshare.
  const keyshare = await session.keygen();

  const signConfig = {
    keyshare,
    messageHash,
  };
  const signature = await session.sign(signConfig);

  console.log('Signature:', signature);
};

EdDSA

App.tsx

import { type EddsaSession } from '@silencelaboratories/silent-shard-sdk';

const messageHash = 'e2a159d17b7bb714aed7675d7c7d394dec8d2e4337842848104694bf89c71c03';

export const signGen = async (session: EddsaSession) => {
  // Creating a new keyshare for demo purpose. In real application, you can use an existing keyshare.
  const keyshare = await session.keygen();

  const signConfig = {
    keyshare,
    messageHash,
  };
  const signature = await session.sign(signConfig);

  console.log('Signature:', signature);
};

• The sign method takes a EcdsaSignConfig object as an argument.
• keyshare(Keyshare) is the client's "share" of the MPC wallet.
• messageHash is the hash of the message to be signed as a hex string.
• When session.sign() is called, the app and the server exchange messages to generate an ECDSA signature.
• signature is the ECDSA signature (hex string) of messageHash, corresponding to the public key (or address) of the wallet.