EAS

World Chain

0x4200000000000000000000000000000000000021

Proxy implementation: 0xc0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d30021

Solidity v0.8.19+commit.7dd6d404

🤖

Query this contract from your AI

Reference: 0x4200000000000000000000000000000000000021

Sample prompt: "Tell me the current state of world/0x4200000000000000000000000000000000000021"

No AI wired up yet? → mcp.smarts.md

World Chain is a docs-only chain on Smarts: source code and ABI are indexed, but live on-chain data (state, recent events, admin profile) is not currently available. AI agents can still query get_contract_info and get_contract_source via MCP.

Overview

Read Functions

Write Functions

Events

Read Functions

getAttestTypeHash() pure

Returns the EIP712 type hash for the attest function.

Returns

Name	Type	Description
—	bytes32	The EIP712 type hash for the attest function.

getAttestation(uid: bytes32) view

Returns an existing attestation by UID.

Parameters

Name	Type	Description
uid	bytes32	The UID of the attestation to retrieve.

Returns

Name	Type	Description
—	tuple	The attestation data members.

getDomainSeparator() view

Returns the domain separator used in the encoding of the signatures for attest, and revoke.

Returns

Name	Type	Description
—	bytes32	The domain separator used in the encoding of the signatures for attest, and revoke.

getName() view

Returns the name of the predeploy at the given address.

Returns

Name	Type	Description
—	string

getNonce(account: address) view

Returns the current nonce per-account.

Parameters

Name	Type	Description
account	address	The requested account.

Returns

Name	Type	Description
—	uint256	The current nonce.

getRevokeOffchain(revoker: address, data: bytes32) view

Returns the timestamp that the specified data was timestamped with.

Parameters

Name	Type	Description
revoker	address
data	bytes32	The data to query.

Returns

Name	Type	Description
—	uint64	The timestamp the data was timestamped with.

getRevokeTypeHash() pure

Returns the EIP712 type hash for the revoke function.

Returns

Name	Type	Description
—	bytes32	The EIP712 type hash for the revoke function.

getSchemaRegistry() pure

Returns the address of the global schema registry.

Returns

Name	Type	Description
—	address	The address of the global schema registry.

getTimestamp(data: bytes32) view

Returns the timestamp that the specified data was timestamped with.

Parameters

Name	Type	Description
data	bytes32	The data to query.

Returns

Name	Type	Description
—	uint64	The timestamp the data was timestamped with.

isAttestationValid(uid: bytes32) view

Checks whether an attestation exists.

Parameters

Name	Type	Description
uid	bytes32	The UID of the attestation to retrieve.

Returns

Name	Type	Description
—	bool	Whether an attestation exists.

version() view

Getter for the semantic version of the contract. This is not meant to be used onchain but instead meant to be used by offchain tooling.

Returns

Name	Type	Description
—	string	Semver contract version as a string.

Write Functions

attest(request: tuple) payable

Processes an attestation and verifies whether it's valid.

Parameters

Name	Type	Description
request	tuple

Returns

Name	Type	Description
—	bytes32	Whether the attestation is valid.

attestByDelegation(delegatedRequest: tuple) payable

Attests to a specific schema via the provided EIP712 signature. Example: attestByDelegation({ schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc', data: { recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', expirationTime: 1673891048, revocable: true, refUID: '0x0000000000000000000000000000000000000000000000000000000000000000', data: '0x1234', value: 0 }, signature: { v: 28, r: '0x148c...b25b', s: '0x5a72...be22' }, attester: '0xc5E8740aD971409492b1A63Db8d83025e0Fc427e', deadline: 1673891048 })

Parameters

Name	Type	Description
delegatedRequest	tuple	The arguments of the delegated attestation request.

Returns

Name	Type	Description
—	bytes32	The UID of the new attestation.

increaseNonce(newNonce: uint256) nonpayable

Provides users an option to invalidate nonces by increasing their nonces to (higher) new values.

Parameters

Name	Type	Description
newNonce	uint256	The (higher) new value.

multiAttest(multiRequests: tuple[]) payable

Processes multiple attestations and verifies whether they are valid.

Parameters

Name	Type	Description
multiRequests	tuple[]

Returns

Name	Type	Description
—	bytes32[]	Whether all the attestations are valid.

multiAttestByDelegation(multiDelegatedRequests: tuple[]) payable

Attests to multiple schemas using via provided EIP712 signatures. Example: multiAttestByDelegation([{ schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc', data: [{ recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', expirationTime: 1673891048, revocable: true, refUID: '0x0000000000000000000000000000000000000000000000000000000000000000', data: '0x1234', value: 0 }, { recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf', expirationTime: 0, revocable: false, refUID: '0x0000000000000000000000000000000000000000000000000000000000000000', data: '0x00', value: 0 }], signatures: [{ v: 28, r: '0x148c...b25b', s: '0x5a72...be22' }, { v: 28, r: '0x487s...67bb', s: '0x12ad...2366' }], attester: '0x1D86495b2A7B524D747d2839b3C645Bed32e8CF4', deadline: 1673891048 }])

Parameters

Name	Type	Description
multiDelegatedRequests	tuple[]	The arguments of the delegated multi attestation requests. The requests should be grouped by distinct schema ids to benefit from the best batching optimization.

Returns

Name	Type	Description
—	bytes32[]	The UIDs of the new attestations.

multiRevoke(multiRequests: tuple[]) payable

Processes revocation of multiple attestation and verifies they can be revoked.

Parameters

Name	Type	Description
multiRequests	tuple[]

multiRevokeByDelegation(multiDelegatedRequests: tuple[]) payable

Revokes existing attestations to multiple schemas via provided EIP712 signatures. Example: multiRevokeByDelegation([{ schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc', data: [{ uid: '0x211296a1ca0d7f9f2cfebf0daaa575bea9b20e968d81aef4e743d699c6ac4b25', value: 1000 }, { uid: '0xe160ac1bd3606a287b4d53d5d1d6da5895f65b4b4bab6d93aaf5046e48167ade', value: 0 }], signatures: [{ v: 28, r: '0x148c...b25b', s: '0x5a72...be22' }, { v: 28, r: '0x487s...67bb', s: '0x12ad...2366' }], revoker: '0x244934dd3e31bE2c81f84ECf0b3E6329F5381992', deadline: 1673891048 }])

Parameters

Name	Type	Description
multiDelegatedRequests	tuple[]	The arguments of the delegated multi revocation attestation requests. The requests should be grouped by distinct schema ids to benefit from the best batching optimization.

multiRevokeOffchain(data: bytes32[]) nonpayable

Revokes the specified multiple bytes32 data.

Parameters

Name	Type	Description
data	bytes32[]	The data to timestamp.

Returns

Name	Type	Description
—	uint64	The timestamp the data was revoked with.

multiTimestamp(data: bytes32[]) nonpayable

Timestamps the specified multiple bytes32 data.

Parameters

Name	Type	Description
data	bytes32[]	The data to timestamp.

Returns

Name	Type	Description
—	uint64	The timestamp the data was timestamped with.

revoke(request: tuple) payable

Processes an attestation revocation and verifies if it can be revoked.

Parameters

Name	Type	Description
request	tuple

revokeByDelegation(delegatedRequest: tuple) payable

Revokes an existing attestation to a specific schema via the provided EIP712 signature. Example: revokeByDelegation({ schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc', data: { uid: '0xcbbc12102578c642a0f7b34fe7111e41afa25683b6cd7b5a14caf90fa14d24ba', value: 0 }, signature: { v: 27, r: '0xb593...7142', s: '0x0f5b...2cce' }, revoker: '0x244934dd3e31bE2c81f84ECf0b3E6329F5381992', deadline: 1673891048 })

Parameters

Name	Type	Description
delegatedRequest	tuple	The arguments of the delegated revocation request.

revokeOffchain(data: bytes32) nonpayable

Revokes the specified bytes32 data.

Parameters

Name	Type	Description
data	bytes32	The data to timestamp.

Returns

Name	Type	Description
—	uint64	The timestamp the data was revoked with.

timestamp(data: bytes32) nonpayable

Timestamps the specified bytes32 data.

Parameters

Name	Type	Description
data	bytes32	The data to timestamp.

Returns

Name	Type	Description
—	uint64	The timestamp the data was timestamped with.

Events

Attested(recipient: address, attester: address, uid: bytes32, schemaUID: bytes32)

Name	Type	Indexed	Description
recipient	address	✓	The recipient of the attestation.
attester	address	✓	The attesting account.
uid	bytes32		The UID the revoked attestation.
schemaUID	bytes32	✓	The UID of the schema.

NonceIncreased(oldNonce: uint256, newNonce: uint256)

Name	Type	Indexed	Description
oldNonce	uint256		The previous nonce.
newNonce	uint256		The new value.

Revoked(recipient: address, attester: address, uid: bytes32, schemaUID: bytes32)

Name	Type	Indexed	Description
recipient	address	✓	The recipient of the attestation.
attester	address	✓	The attesting account.
uid	bytes32		The UID the revoked attestation.
schemaUID	bytes32	✓	The UID of the schema.

RevokedOffchain(revoker: address, data: bytes32, timestamp: uint64)

Name	Type	Indexed	Description
revoker	address	✓	The address of the revoker.
data	bytes32	✓	The data.
timestamp	uint64	✓	The timestamp.

Timestamped(data: bytes32, timestamp: uint64)

Name	Type	Indexed	Description
data	bytes32	✓	The data.
timestamp	uint64	✓	The timestamp.