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

verify_signers

function verify_signers(ft_and_evm_signers: list<byte_array>)(source)

Verifies whether provided list of signers have signed the operation/transaction. FT (GTX) signers are checked against GTX signers and signatures fields, while EVM signers are checked against signers and signatures provided in external.auth.evm_signatures operation. Only used when the signers are not part of an auth descriptor, for example when an auth descriptor is being registered.

Can only be called from an operation.

Throws "MISSING AUTH OP" when no auth operation is found to be preceding the current one but the message template requires the account and/or auth descriptor ID that would be found there.

Throws if the auth handler for the current operation cannot be found.

Throws if the signers cannot be verified. Common cases are:

  • the EVM signers and signatures in evm_signers are in different order

  • some EVM signers have not signed the message, or any of them have signed a wrong message

  • some FT signers did not sign the transaction

  • the message for the EVM signers was empty

Parameters

ft_and_evm_signers

the signers that are expected to be found.

See also

verify_signers_with_message

if you need to verify that these signers signed a different message than the one defined in the auth_handler for the current operation