posthttps://api.circle.com/v1/w3s/developer/sign/message
Sign a message from a specified developer-controlled wallet. This endpoint supports message signing for both Ethereum-based blockchains (using EIP-191) and Solana (using Ed25519 signatures). Note that Smart Contract Accounts (SCA) are specific to Ethereum and EVM-compatible chains. The difference between Ethereum's EOA and SCA can be found in the account types guide. You can also check the list of Ethereum Dapps that support SCA: https://eip1271.io/.
A base64 string expression of the entity secret ciphertext. The entity secret should be encrypted by the entity public key. Circle mandates that the entity secret ciphertext is unique for each API request.
The user friendly message that needs to be signed. If it is a hex string, encodedByHex needs to be TRUE. The hex string should start with “0x” and have even length.
System-generated unique identifier of the resource.
Indicator of whether the input message is encoded by hex. If TRUE, then the message should be a hex string. By default, it is False.
The human readable explanation for this sign action. Useful for presenting with extra information.
1{
2 "data": {
3 "signature": "3W6r38STvZuBSmk2bbbct132SjEsYSARo3CJi3JQvNUaFoYu..."
4 }
5}