This is an ethers.js compatible Signer that uses AWS KMS. This works for any EVM-compatible chain.

In order to create an Ethereum-compatible key in AWS KMS, select the following options:

• Key Type: Asymmetric
• Key Usage: Sign and Verify
• Key Spec: ECC_SECG_P256K1

Once the key is set up, one can easily instantiate a KMS-based Signer, as such:

import { KMSSigner } from '@hashflow/aws-kms-ethers-signer';

const signer = new KMSSigner(regionId, keyId, provider);

await signer.sendTransaction(..);

To run tests:

• Populate an .env file (see .env.example)
• yarn
• yarn test