FUNCTION

_validate_evm_signature

FT4 Library / FT4 Library / lib.ft4.core.auth

function _validate_evm_signature(op: gtx_operation, auth_op: gtx_operation, flags: list<text>, account: account, auth_descriptor: account_auth_descriptor)

source

Verifies that the signature found in the evm_auth operation is valid to authorize the operation being called.

Throws if the signature cannot be validated. The most common reasons include:

the auth handler for op is not found
the signer is not registered in the auth descriptor
too few signers signed the operation, in case of a multisig auth descriptor
the signer signed the wrong message
the auth descriptor does not give sufficient permissions for the operation that is being called

Parameters

op — the operation being called
auth_op — the evm_auth operation that is authorizing this operation
flags — the flags required by the operation
account — the account the user authenticated as
auth_descriptor — the auth descriptor that is authorizing this operation