Validation

The validation program is the ERC-8004 validation surface: anyone can open a validation request against an agent (“did it actually run this task?”), and anyone can answer as a validator with a verdict and evidence. There is no validator allowlist or staking on-chain — this registry anchors requests and responses; deciding which validators to trust is an off-chain concern. Program ID (devnet): GQHB7DDt2558Tncx3hHtw8w9fi2xZhvXQ5nGmgyGaL2H

Instructions

Tag	Instruction	Arguments	Accounts, in order	Notes
0	`Initialize`	—	registry w p +, admin s, rent payer s, system program	One-time. Sets `next_request_id = 1`.
1	`Request`	`agent_id: u64`, `validator_type: String`, `task_hash: [u8;32]`, `request_uri: String`	registry w, request w p +, agent request index w p +, identity program, agent p (read cross-program), requester s, rent payer s, system program	The agent must exist in identity. `validator_type` is a short label for the method you expect (≤ 64 chars).
2	`Respond`	`request_id: u64`, `valid: bool`, `evidence_hash: [u8;32]`, `evidence_uri: String`	request w p, response index w p +, response w p +, validator s, rent payer s, system program	Any signer may validate. Responses are 1-based per request. Closed requests reject new responses.
3	`Close`	`request_id: u64`	request w p, requester s	Only the original requester. Sets a `closed` flag — the account (and its responses) stays readable.

Account markers: s = signer, w = writable, p = PDA verified, + = created if missing.

Lifecycle

Request ──▶ Respond (×N, any validators) ──▶ Close (requester only)

task_hash pins the work being validated; request_uri points at the full brief.
Each response is valid + evidence_hash + evidence_uri — a verdict and its receipt.
A per-request index (validation-response-index) counts responses; a per-agent index (validation-agent-index) lists every request against that agent (both are the shared index structs described in Accounts & Encoding).

State

Account	Seeds	Contents
`Registry`	`[b"registry"]`	`admin`, `next_request_id`, `total_requests`
`Request`	`[b"request", request_id_le]`	`agent_id`, `requester`, `validator_type`, `task_hash`, `request_uri`, `timestamp`, `closed`, `response_count`
`Response`	`[b"response", request_id_le, response_count_le]`	`validator`, `valid`, `evidence_hash`, `evidence_uri`, `timestamp`

Worth knowing

“Closed” is a flag, not a cleanup. Rent stays locked in the request account; nothing is deleted anywhere in the suite.
No verdict aggregation on-chain. Like reputation, this program is the write side of the ledger — summary scores belong to your indexer.

Protocol

EVM Contracts

Extensions

Solana Programs

Instructions

Lifecycle

State

Worth knowing

​Instructions

​Lifecycle

​State

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Instructions

Lifecycle

State

Worth knowing