EthSigner acts as a proxy service by forwarding requests to the Ethereum client. When EthSigner receives a transaction it generates a signature using the stored private key, and forwards the signed transaction to the Ethereum client.
EthSigner can sign transactions with a key stored in:
- A V3 keystore file stored on a file system accessible by the host.
- Hashicorp Vault.
- Azure Key Vault.
EthSigner supports using multiple private keys with file-based signing (using V3 keystore files).
The transaction process when using EthSigner is: