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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {IOPGasPriceOracle} from "../interfaces/IOPGasPriceOracle.sol";

library ChainHelper {
    address public constant OP_GAS_PRICE_ORACLE_ADDR = address(0x420000000000000000000000000000000000000F);
    uint256 public constant OP_MAINNET_CHAIN_ID = 10;
    uint256 public constant OP_GOERLI_TESTNET_CHAIN_ID = 420;
    uint256 public constant OP_DEVNET_L1_CHAIN_ID = 900;
    uint256 public constant OP_DEVNET_L2_CHAIN_ID = 901;
    uint32 public constant OP_BASIC_FULFILLMENT_L1_GAS_USED = 5016;
    uint32 public constant OP_FULFILLMENT_GAS_PER_PARTICIPANT = 652;
    uint256 public constant OP_DIVISOR_DECIMALS = 6;

    function getBlockTime() public view returns (uint256) {
        uint256 chainId = block.chainid;
        if (chainId == OP_MAINNET_CHAIN_ID || chainId == OP_GOERLI_TESTNET_CHAIN_ID || chainId == OP_DEVNET_L2_CHAIN_ID)
        {
            return 2;
        } else if (chainId == OP_DEVNET_L1_CHAIN_ID) {
            return 3;
        }
        return 12;
    }

    function getCurrentTxL1GasFees() public view returns (uint256) {
        uint256 chainId = block.chainid;
        if (chainId == OP_MAINNET_CHAIN_ID || chainId == OP_GOERLI_TESTNET_CHAIN_ID || chainId == OP_DEVNET_L2_CHAIN_ID)
        {
            return IOPGasPriceOracle(OP_GAS_PRICE_ORACLE_ADDR).getL1Fee(msg.data);
        }
        return 0;
    }

    function getTxL1GasFees(uint256 l1GasUsed) public view returns (uint256) {
        uint256 chainId = block.chainid;
        if (chainId == OP_MAINNET_CHAIN_ID || chainId == OP_GOERLI_TESTNET_CHAIN_ID || chainId == OP_DEVNET_L2_CHAIN_ID)
        {
            uint256 l1Fee = l1GasUsed * IOPGasPriceOracle(OP_GAS_PRICE_ORACLE_ADDR).l1BaseFee();
            uint256 divisor = 10 ** OP_DIVISOR_DECIMALS;
            uint256 unscaled = l1Fee * IOPGasPriceOracle(OP_GAS_PRICE_ORACLE_ADDR).scalar();
            return unscaled / divisor;
        }
        return 0;
    }

    function getFulfillmentTxL1GasUsed(uint32 groupSize) public view returns (uint256) {
        uint256 chainId = block.chainid;
        if (chainId == OP_MAINNET_CHAIN_ID || chainId == OP_GOERLI_TESTNET_CHAIN_ID || chainId == OP_DEVNET_L2_CHAIN_ID)
        {
            return OP_BASIC_FULFILLMENT_L1_GAS_USED + groupSize * OP_FULFILLMENT_GAS_PER_PARTICIPANT;
        }
        return 0;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

interface IOPGasPriceOracle {
    /// @notice Computes the L1 portion of the fee based on the size of the rlp encoded input
    ///         transaction, the current L1 base fee, and the various dynamic parameters.
    /// @param _data Unsigned fully RLP-encoded transaction to get the L1 fee for.
    /// @return L1 fee that should be paid for the tx
    function getL1Fee(bytes memory _data) external view returns (uint256);
    /// @notice Retrieves the current fee scalar.
    /// @return Current fee scalar.
    function scalar() external view returns (uint256);
    /// @notice Retrieves the latest known L1 base fee.
    /// @return Latest known L1 base fee.
    function l1BaseFee() external view returns (uint256);
}

{
  "remappings": [
    "Randcast-User-Contract/=lib/Randcast-User-Contract/contracts/",
    "Staking-v0.1/=lib/Staking-v0.1/src/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 300
  },
  "metadata": {
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "libraries": {}
}

[{"inputs":[],"name":"OP_BASIC_FULFILLMENT_L1_GAS_USED","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_DEVNET_L1_CHAIN_ID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_DEVNET_L2_CHAIN_ID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_DIVISOR_DECIMALS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_FULFILLMENT_GAS_PER_PARTICIPANT","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_GAS_PRICE_ORACLE_ADDR","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_GOERLI_TESTNET_CHAIN_ID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OP_MAINNET_CHAIN_ID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBlockTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentTxL1GasFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"groupSize","type":"uint32"}],"name":"getFulfillmentTxL1GasUsed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"l1GasUsed","type":"uint256"}],"name":"getTxL1GasFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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