# is_evm_signatures_op · FT4 Rell API · Chromia Docs (concept)

> function is_ evm_ signatures_ op(op: gtx_ operation): boolean Verifies whether the operation passed is evm_signatures Parameters op — the operation to chec

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.core.auth/is_evm_signatures_op/

FUNCTION

# is\_evm\_signatures\_op

```signature
function is_evm_signatures_op(op: gtx_operation): boolean
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/auth/authentication.rell#lines-794)

Verifies whether the operation passed is `evm_signatures`

**Parameters**

* **op** — the operation to check

**See Also**

* `external.auth.evm_signatures` — for information on the operation

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-rell/-f-t4%20-library/lib.ft4.core.auth/is_evm_signatures_op.html)Generated API reference, mirrored from the live docs