packages/util-crypto/src/sr25519/agreement.ts
// Copyright 2017-2024 @polkadot/util-crypto authors & contributors
// SPDX-License-Identifier: Apache-2.0
import { u8aToU8a } from '@polkadot/util';
import { sr25519Agree } from '@polkadot/wasm-crypto';
/**
* @name sr25519Agreement
* @description Key agreement between other's public key and self secret key
*/
export function sr25519Agreement (secretKey: string | Uint8Array, publicKey: string | Uint8Array): Uint8Array {
const secretKeyU8a = u8aToU8a(secretKey);
const publicKeyU8a = u8aToU8a(publicKey);
if (publicKeyU8a.length !== 32) {
throw new Error(`Invalid publicKey, received ${publicKeyU8a.length} bytes, expected 32`);
} else if (secretKeyU8a.length !== 64) {
throw new Error(`Invalid secretKey, received ${secretKeyU8a.length} bytes, expected 64`);
}
return sr25519Agree(publicKeyU8a, secretKeyU8a);
}