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

> struct confirmation_ proof {
 hash: byte_ array;
 blockHeader: byte_ array;
 witness: byte_ array;
 merkleProofTree: list<gtv>;
 txIndex: integer;
} 

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

STRUCT

# confirmation\_proof

```signature
struct confirmation_proof {
 hash: byte_array;
 blockHeader: byte_array;
 witness: byte_array;
 merkleProofTree: list<gtv>;
 txIndex: integer;
}
```

[Source](https://gitlab.com/chromaway/ft4-lib/src/development/rell/src/lib/iccf/module.rell#lines-4)

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