ECDSA signature

Two types of signature supported

• EIP712

• EthSign

EIP712

This signature type is best for web frontends that present an order to be signed through Metamask in a human-readable format. It relies on the eth_signTypedData JSON-RPC method exposed by MetaMask. This signature has the signatureType of 2.

EthSign

This signature is best for use with headless providers, such as when using a geth node. This relies on the eth_sign JSON-RPC method common to all nodes. This signature has the signatureType of 3.