Contract Reference

Deployed Contract

Network	Address	Deploy Block	Etherscan
Base mainnet	TBD	TBD	TBD
Sepolia testnet	0xE772B7f4eC4a92109b8b892Add205ede7c850DBa	10575629	View on Etherscan

Anchored Event

The Anchored event is emitted once per registration. It is the sole source of truth for reconstructing the registry from on-chain data.

event Anchored(
    string  indexed arId,           // AR-ID (keccak256 indexed)
    address indexed registrant,     // wallet that called anchor()
    uint8           artifactType,   // ArtifactType enum value (0–23)
    string          arIdPlain,      // AR-ID plain text (not indexed)
    string          descriptor,     // short descriptor / subtitle
    string          title,          // artifact title
    string          author,         // human-readable author / org name
    string          manifestHash,   // content hash (SHA-256 or IPFS CID)
    string          parentArId,     // parent AR-ID ("" if root)
    string  indexed treeId,         // tree identifier (keccak256 indexed)
    string          treeIdPlain,    // tree identifier plain text
    bytes32         tokenCommitment // keccak256(K || arId), bytes32(0) for governance
);

Field descriptions:

Field	Type	Description
arId	string	Unique AnchorRegistry identifier, e.g. AR-2026-x1llnO1. Indexed — stored as keccak256 in logs.
registrant	address	Ethereum address of the wallet that submitted the anchor() transaction.
artifactType	uint8	Integer index into the ArtifactType enum (0–22). See the type taxonomy below.
arIdPlain	string	Human-readable AR-ID. Identical to arId but not indexed — readable from log data.
descriptor	string	Short subtitle or descriptor for the artifact.
title	string	Full title of the artifact.
author	string	Human-readable author or organization name.
manifestHash	string	Content hash (SHA-256 hex or IPFS CID) proving the artifact’s content at registration time.
parentArId	string	AR-ID of the parent artifact. Empty string "" if this is a root anchor.
treeId	string	Identifier for the artifact tree this anchor belongs to. Indexed.
treeIdPlain	string	Human-readable tree identifier. Identical to treeId but not indexed.
tokenCommitment	bytes32	Ownership proof: keccak256(K || arId) for user-initiated anchors, bytes32(0) for governance anchors. K is the ownership token known only to the registrant.

Sealed Event

The Sealed event is emitted when a tree root is sealed via registerSeal. A sealed tree is authentic and complete — no new anchors may be appended. AR governance (VOID, REVIEW, AFFIRMED) can still target anchors within sealed trees.

event Sealed(
    string  indexed arId,            // root AR-ID being sealed
    string          newTreeRoot,      // optional continuation pointer
    string          reason,           // human-readable reason
    uint256         sealedAtBlock,    // block number of seal
    bytes32         tokenCommitment   // H(K || C_seal) — always non-zero
);

READ_ABI

The minimal ABI used by anchorregistry to read from the contract. This is the only ABI needed — the package never writes to the contract.

READ_ABI = [
    # Anchored event
    {
        "anonymous": False,
        "name": "Anchored",
        "type": "event",
        "inputs": [
            {"indexed": True,  "internalType": "string",            "name": "arId",         "type": "string"},
            {"indexed": True,  "internalType": "address",           "name": "registrant",   "type": "address"},
            {"indexed": False, "internalType": "enum ArtifactType", "name": "artifactType", "type": "uint8"},
            {"indexed": False, "internalType": "string",            "name": "arIdPlain",    "type": "string"},
            {"indexed": False, "internalType": "string",            "name": "descriptor",   "type": "string"},
            {"indexed": False, "internalType": "string",            "name": "title",        "type": "string"},
            {"indexed": False, "internalType": "string",            "name": "author",       "type": "string"},
            {"indexed": False, "internalType": "string",            "name": "manifestHash", "type": "string"},
            {"indexed": False, "internalType": "string",            "name": "parentArId",   "type": "string"},
            {"indexed": True,  "internalType": "string",            "name": "treeId",       "type": "string"},
            {"indexed": False, "internalType": "string",            "name": "treeIdPlain",  "type": "string"},
            {"indexed": False, "internalType": "bytes32",           "name": "tokenCommitment", "type": "bytes32"},
        ],
    },
    # Sealed event
    {
        "anonymous": False,
        "name": "Sealed",
        "type": "event",
        "inputs": [
            {"indexed": True,  "internalType": "string",  "name": "arId",            "type": "string"},
            {"indexed": False, "internalType": "string",  "name": "newTreeRoot",      "type": "string"},
            {"indexed": False, "internalType": "string",  "name": "reason",           "type": "string"},
            {"indexed": False, "internalType": "uint256", "name": "sealedAtBlock",    "type": "uint256"},
            {"indexed": False, "internalType": "bytes32", "name": "tokenCommitment",  "type": "bytes32"},
        ],
    },
    # isSealed(arId) → bool
    {
        "type": "function",
        "name": "isSealed",
        "stateMutability": "view",
        "inputs":  [{"internalType": "string", "name": "", "type": "string"}],
        "outputs": [{"internalType": "bool",   "name": "", "type": "bool"}],
    },
    # sealContinuation(arId) → string
    {
        "type": "function",
        "name": "sealContinuation",
        "stateMutability": "view",
        "inputs":  [{"internalType": "string", "name": "", "type": "string"}],
        "outputs": [{"internalType": "string", "name": "", "type": "string"}],
    },
    # registered(arId) → bool
    {
        "type": "function",
        "name": "registered",
        "stateMutability": "view",
        "inputs":  [{"internalType": "string", "name": "", "type": "string"}],
        "outputs": [{"internalType": "bool",   "name": "", "type": "bool"}],
    },
    # getAnchorData(arId) → bytes
    {
        "type": "function",
        "name": "getAnchorData",
        "stateMutability": "view",
        "inputs":  [{"internalType": "string", "name": "arId", "type": "string"}],
        "outputs": [{"internalType": "bytes",  "name": "",     "type": "bytes"}],
    },
    # anchorTypes(arId) → uint8
    {
        "type": "function",
        "name": "anchorTypes",
        "stateMutability": "view",
        "inputs":  [{"internalType": "string",  "name": "",  "type": "string"}],
        "outputs": [{"internalType": "uint8",   "name": "",  "type": "uint8"}],
    },
]

Artifact Types

Twenty-four artifact types in eight logical groups. The artifact_type_name field in every record contains the string name. The artifactType field in the raw event contains the integer index.

Index	Name	Category	Type-specific data fields
0	CODE	Content	git_hash, license, language, version, url
1	RESEARCH	Content	doi, institution, co_authors, url
2	DATA	Content	data_version, format, row_count, schema_url, url
3	MODEL	Content	model_version, architecture, parameters, training_dataset, url
4	AGENT	Content	agent_version, runtime, capabilities, url
5	MEDIA	Content	media_type, platform, format, duration, isrc, url
6	TEXT	Content	text_type, isbn, publisher, language, url
7	POST	Content	platform, post_id, post_date, url
8	ONCHAIN	Content	chain_id, asset_type, contract_address, tx_hash, token_id, block_number, url
9	REPORT	Content	report_type, client, engagement, version, authors, institution, url, file_manifest_hash
10	NOTE	Content	note_type, date, participants, url, file_manifest_hash
11	WEBSITE	Content	url, platform, description
12	EVENT	Lifecycle	executor, event_type, event_date, location, orchestrator, url
13	RECEIPT	Transaction	receipt_type, merchant, amount, currency, order_id, platform, url, file_manifest_hash
14	LEGAL	Gated	doc_type, jurisdiction, parties, effective_date, url
15	ENTITY	Gated	entity_type, entity_domain, verification_method, verification_proof, canonical_url, document_hash
16	PROOF	Gated	proof_type, proof_system, circuit_id, vkey_hash, audit_firm, audit_scope, verifier_url, report_url, proof_hash
17	SEAL	Self-service	(registered via dedicated registerSeal function, not registerContent )
18	RETRACTION	Self-service	reason, replaced_by
19	REVIEW	Review	review_type, evidence_url
20	VOID	Review	review_ar_id, finding_url, evidence
21	AFFIRMED	Review	affirmed_by, finding_url
22	ACCOUNT	Billing	capacity (uint256)
23	OTHER	Catch-all	kind, platform, url, value, file_manifest_hash