Ethereum transactions rely on EIP-712 for secure and structured signing, while Cosmos SDK uses Tendermint’s Protobuf-based messages. This mismatch makes it difficult for Ethereum wallets like MetaMask to interact with Cosmos chains. Here I will explain a solution that integrates Ethereum-compatible signing into Cosmos chains that can enable chain abstraction / cross-chain interoperability, reducing friction for users.

Ethereum transactions rely on EIP-712 for secure and structured signing, while Cosmos SDK uses Tendermint’s Protobuf-based messages. This mismatch makes it difficult for Ethereum wallets like MetaMask to interact with Cosmos chains. Here I will explain a solution that integrates Ethereum-compatible signing into Cosmos chains that can enable chain abstraction / cross-chain interoperability, reducing friction for users.