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Version: 2.0.0

IUnirep.sol

Events​

The UniRep contract emits a number of events to help offchain observers track state.

AttesterSignedUp​

Emitted when an attester registers with the UniRep contract.

event AttesterSignedUp(
    uint160 indexed attesterId,
    uint48 epochLength,
    uint48 timestamp
);

UserSignUp​

Emitted when a user joins an attester.

event UserSignedUp(
    uint48 indexed epoch,
    uint256 indexed identityCommitment,
    uint160 indexed attesterId,
    uint256 leafIndex
);

UserStateTransitioned​

Emitted when a user transitions to a new epoch.

event UserStateTransitioned(
    uint48 indexed epoch,
    uint160 indexed attesterId,
    uint256 indexed leafIndex,
    uint256 hashedLeaf,
    uint256 nullifier
);

Attestation​

Emitted when an attester makes an attestation to an epoch key.

event Attestation(
    uint48 indexed epoch,
    uint256 indexed epochKey,
    uint160 indexed attesterId,
    uint256 fieldIndex,
    uint256 change
);

StateTreeLeaf​

Emitted when a leaf is added to a state tree.

event StateTreeLeaf(
    uint48 indexed epoch,
    uint160 indexed attesterId,
    uint256 indexed index,
    uint256 leaf
);

EpochTreeLeaf​

Emitted when a leaf in an epoch tree is updated.

event EpochTreeLeaf(
    uint48 indexed epoch,
    uint160 indexed attesterId,
    uint256 indexed index,
    uint256 leaf
);

HistoryTreeLeaf​

Emitted when a leaf is added to the history tree.

event HistoryTreeLeaf(
    uint160 indexed attesterId,
    uint256 leaf
);

EpochEnded​

Emitted when an attester epoch ends.

event EpochEnded(uint48 indexed epoch, uint160 indexed attesterId);

Structs​

SignupSignals​

Public signals of a user signup proof.

struct SignupSignals {
    uint256 stateTreeLeaf;
    uint48 epoch;
    uint48 chainId;
    uint160 attesterId;
    uint256 identityCommitment;
}

UserStateTransitionSignals​

Public signals of a user state transition proof.

struct UserStateTransitionSignals {
    uint256 historyTreeRoot;
    uint256 stateTreeLeaf;
    uint48 toEpoch;
    uint160 attesterId;
    uint256[] epochKeys;
}

EpochKeyData​

EpochKeyData saves the current status of an epoch key.

struct EpochKeyData {
    uint256 leaf;
    uint40 leafIndex;
    uint48 epoch;
    uint256[128] data;
}

AttesterData​

The current status of an attester.

struct AttesterData {
    mapping(uint256 => mapping(uint256 => bool)) stateTreeRoots;
    ReusableTreeData stateTree;
    mapping(uint256 => bool) historyTreeRoots;
    IncrementalTreeData historyTree;
    mapping(uint256 => uint256) epochTreeRoots;
    LazyTreeData epochTree;
    uint48 startTimestamp;
    uint48 currentEpoch;
    uint48 epochLength;
    mapping(uint256 => bool) identityCommitments;
    IncrementalTreeData semaphoreGroup;
    mapping(uint256 => EpochKeyData) epkData;
}

Config​

The circuit config.

struct Config {
    uint8 stateTreeDepth;
    uint8 epochTreeDepth;
    uint8 historyTreeDepth;
    uint8 fieldCount;
    uint8 sumFieldCount;
    uint8 numEpochKeyNoncePerEpoch;
    uint8 replNonceBits;
    uint8 replFieldBits;
}