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

> function make_ transaction_ unique(gtx_ transaction: gtx_ transaction) Prevents this transaction to be proved multiple times by storing the hash Parameters

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.iccf/make_transaction_unique/

FUNCTION

# make\_transaction\_unique

```signature
function make_transaction_unique(gtx_transaction: gtx_transaction)
```

[Source](https://gitlab.com/chromaway/ft4-lib/src/development/rell/src/lib/iccf/module.rell#lines-288)

Prevents this transaction to be proved multiple times by storing the hash

**Parameters**

* **gtx\_transaction** — The transaction to make unique

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