evm precompiles

QoreChain extends the EVM with six custom precompiled contracts that expose protocol-level features directly to Solidity. These precompiles provide on-chain access to post-quantum cryptography, AI risk scoring, cross-VM messaging, and RL consensus parameters.

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Precompile Address Map

Precompile	Address	Base Gas	Description
CrossVM Bridge	0x0000000000000000000000000000000000000901	50,000	Synchronous cross-VM calls (EVM to CosmWasm)
PQC Verify	0x0000000000000000000000000000000000000A01	25,000 + 8/byte	Verify ML-DSA-87 post-quantum signatures
PQC Key Status	0x0000000000000000000000000000000000000A02	2,500	Check if an account has a registered PQC key
AI Risk Score	0x0000000000000000000000000000000000000B01	50,000	Get AI-generated risk score for transaction data
AI Anomaly Check	0x0000000000000000000000000000000000000B02	40,000	Check if a transfer is flagged as anomalous
RL Consensus Params	0x0000000000000000000000000000000000000C01	1,500	Read current RL-tuned consensus parameters

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Solidity Interfaces

IQorePQC.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IQorePQC {
    /// @notice Verify an ML-DSA-87 (Dilithium-5) signature
    /// @param pubkey The 2592-byte ML-DSA-87 public key
    /// @param signature The 4627-byte ML-DSA-87 signature
    /// @param message The original message bytes
    /// @return valid True if the signature is valid
    function pqcVerify(
        bytes calldata pubkey,
        bytes calldata signature,
        bytes calldata message
    ) external view returns (bool valid);

    /// @notice Check if an account has a registered PQC public key
    /// @param account The Ethereum-style address to check
    /// @return registered True if a PQC key is registered
    /// @return algorithmId The PQC algorithm identifier (1 = ML-DSA-87)
    /// @return pubkey The registered public key bytes (empty if not registered)
    function pqcKeyStatus(address account)
        external
        view
        returns (bool registered, uint8 algorithmId, bytes memory pubkey);
}

IQoreAI.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IQoreAI {
    /// @notice Get the AI-generated risk score for transaction data
    /// @param txData The transaction data to evaluate
    /// @return score Risk score in basis points (0-10000)
    /// @return level Risk level: 0=SAFE, 1=LOW, 2=MEDIUM, 3=HIGH, 4=CRITICAL
    function aiRiskScore(bytes calldata txData)
        external
        view
        returns (uint256 score, uint8 level);

    /// @notice Check if a transfer is flagged as anomalous
    /// @param sender The sender address
    /// @param amount The transfer amount in wei
    /// @return anomalyScore The anomaly score (higher = more anomalous)
    /// @return flagged True if the transfer exceeds the anomaly threshold
    function aiAnomalyCheck(address sender, uint256 amount)
        external
        view
        returns (uint256 anomalyScore, bool flagged);
}

IQoreConsensus.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IQoreConsensus {
    /// @notice Get current RL-tuned consensus parameters
    /// @return blockTime Current target block time in milliseconds
    /// @return baseGasPrice Current base gas price in wei
    /// @return validatorSetSize Current active validator set size
    /// @return epoch Current RL epoch number
    function rlConsensusParams()
        external
        view
        returns (
            uint256 blockTime,
            uint256 baseGasPrice,
            uint256 validatorSetSize,
            uint256 epoch
        );
}

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Usage Examples

PQC Verify -- Verify a Post-Quantum Signature

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "./interfaces/IQorePQC.sol";

contract PQCVerifier {
    IQorePQC constant PQC = IQorePQC(0x0000000000000000000000000000000000000A01);

    /// @notice Verify a PQC signature and revert if invalid
    function verifyOrRevert(
        bytes calldata pubkey,
        bytes calldata signature,
        bytes calldata message
    ) external view {
        bool valid = PQC.pqcVerify(pubkey, signature, message);
        require(valid, "PQC signature verification failed");
    }
}

Gas cost: 25,000 base + 8 gas per byte of input data. For a typical ML-DSA-87 verification (2592 + 4627 + message bytes), expect approximately 80,000-90,000 gas.

PQC Key Status -- Check Account Registration

contract PQCChecker {
    IQorePQC constant PQC_STATUS = IQorePQC(0x0000000000000000000000000000000000000A02);

    function requirePQCKey(address account) external view {
        (bool registered, , ) = PQC_STATUS.pqcKeyStatus(account);
        require(registered, "Account must have a registered PQC key");
    }
}

Gas cost: 2,500 flat.

AI Risk Score -- Evaluate Transaction Risk

import "./interfaces/IQoreAI.sol";

contract RiskGate {
    IQoreAI constant AI = IQoreAI(0x0000000000000000000000000000000000000B01);

    uint8 constant MAX_ALLOWED_RISK = 2; // Allow up to MEDIUM

    function executeIfSafe(bytes calldata txData) external {
        (uint256 score, uint8 level) = AI.aiRiskScore(txData);
        require(level <= MAX_ALLOWED_RISK, "Risk level too high");

        // Proceed with execution...
    }
}

Risk levels:

Level	Value	Score Range (bps)
SAFE	0	0 - 1000
LOW	1	1001 - 3000
MEDIUM	2	3001 - 6000
HIGH	3	6001 - 8500
CRITICAL	4	8501 - 10000

Gas cost: 50,000 flat.

AI Anomaly Check -- Flag Suspicious Transfers

contract AnomalyGuard {
    IQoreAI constant AI = IQoreAI(0x0000000000000000000000000000000000000B02);

    function safeTransfer(address sender, uint256 amount) external view {
        (uint256 anomalyScore, bool flagged) = AI.aiAnomalyCheck(sender, amount);

        if (flagged) {
            revert("Transfer flagged as anomalous");
        }
    }
}

Gas cost: 40,000 flat.

RL Consensus Params -- Read Consensus State

contract ConsensusReader {
    IQoreConsensus constant RL = IQoreConsensus(
        0x0000000000000000000000000000000000000C01
    );

    function getBlockTime() external view returns (uint256) {
        (uint256 blockTime, , , ) = RL.rlConsensusParams();
        return blockTime;
    }

    function getCurrentEpoch() external view returns (uint256) {
        (, , , uint256 epoch) = RL.rlConsensusParams();
        return epoch;
    }
}

Gas cost: 1,500 flat.

CrossVM Bridge -- Call CosmWasm from EVM

interface ICrossVM {
    function call(bytes calldata payload) external returns (bytes memory);
}

contract CrossVMExample {
    ICrossVM constant CROSSVM = ICrossVM(
        0x0000000000000000000000000000000000000901
    );

    function callCosmWasm(
        string memory contractAddr,
        string memory executeMsg
    ) external returns (bytes memory) {
        bytes memory payload = abi.encode(contractAddr, executeMsg, uint256(0));
        return CROSSVM.call(payload);
    }
}

Gas cost: 50,000 base + target contract execution cost. See Cross-VM Interoperability for details.

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Interface File Locations

The Solidity interface files are available in the repository for direct import:

contracts/
  interfaces/
    IQorePQC.sol
    IQoreAI.sol
    IQoreConsensus.sol
    ICrossVM.sol

Install them in your Hardhat or Foundry project:

# Copy interfaces to your project
cp -r contracts/interfaces/ my-project/contracts/interfaces/

Or reference them via import path in your Solidity files:

import "./interfaces/IQorePQC.sol";
import "./interfaces/IQoreAI.sol";
import "./interfaces/IQoreConsensus.sol";

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Next Steps

• Cross-VM Interoperability -- Full cross-VM messaging documentation

• EVM Development -- Deploying Solidity contracts

• Account Abstraction -- Programmable accounts with session keys