# Custom attestor (/integration-guides/custom-attestor)



`In progress`

A custom attestor registers a profile, responds to validation requests, and can revoke an attestation it issued. PolicyVault then reads the resulting PDA by fixed byte offsets.

| Source               | Path                                                                                                                                                                                                       |
| -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| attestor profile     | [`programs/validation-registry/src/state/attestor_profile.rs`](https://github.com/agenttrust-labs/agenttrust/blob/main/programs/validation-registry/src/state/attestor_profile.rs)                         |
| response instruction | [`programs/validation-registry/src/instructions/respond_to_validation.rs`](https://github.com/agenttrust-labs/agenttrust/blob/main/programs/validation-registry/src/instructions/respond_to_validation.rs) |
| revoke instruction   | [`programs/validation-registry/src/instructions/revoke_validation.rs`](https://github.com/agenttrust-labs/agenttrust/blob/main/programs/validation-registry/src/instructions/revoke_validation.rs)         |