To allow for compatibility with Ethereum signatures for certain use cases, we should introduce host functions for the Keccak256 hashing algorithm and the secpk256k1 signature curve used in Ethereum's ECDSA implementation.
Possible solution design or implementation
introduce two new host functions for Keccack256 and secp256k1 signature verification.
Summary
To allow for compatibility with Ethereum signatures for certain use cases, we should introduce host functions for the Keccak256 hashing algorithm and the secpk256k1 signature curve used in Ethereum's ECDSA implementation.
Possible solution design or implementation
introduce two new host functions for Keccack256 and secp256k1 signature verification.