BaseVerifierHelper.sol

This is a basic verifier helper contract. It contains signals and error codes used across verifier helper contracts.

chainid

Get the current chain ID.

EpochKeySignals

Signals inside a epoch key proof and epoch key lite proof.

caution

stateTreeRoot will be 0 in an epoch key lite proof.

struct EpochKeySignals {
  uint256 epochKey;
  uint256 stateTreeRoot;
  uint256 data;
  uint160 attesterId;
  uint48 epoch;
  uint48 chainId;
  uint8 nonce;
  bool revealNonce;
}

ReputationSignals

Signals inside a reputation proof.

struct ReputationSignals {
  uint256 epochKey;
  uint256 stateTreeRoot;
  uint256 minRep;
  uint256 maxRep;
  uint256 graffiti;
  uint256 data;
  uint160 attesterId;
  uint48 epoch;
  uint48 chainId;
  uint8 nonce;
  bool revealNonce;
  bool proveMinRep;
  bool proveMaxRep;
  bool proveZeroRep;
  bool proveGraffiti;
}

decodeEpochKeyControl

Decode an epoch key related control from epoch key lite proof, epoch key proof, and reputation proof into named variables.

function decodeEpochKeyControl(uint256 control)
    public
    pure
    returns (
      uint8 nonce,
      uint48 epoch,
      uint160 attesterId,
      bool revealNonce,
      uint48 chainId
    )

shift

Get data in certain range of bits.

data
Variable bits	Shift bits

It will return a variable from data within variable bits.

function shiftAndParse(
  uint256 data,
  uint8 shiftBits,
  uint8 variableBits
) public pure returns (uint256)