Contract Source Code (Solidity Standard Json-Input format)

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pragma solidity 0.8.20;

// forgefmt: disable-start
/**
                                                                                                                   
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   ggggggggg   ggggg aaaaaaaaaaaaa      ssssssssss         b:::::bbbbbbbbb      aaaaaaaaaaaaa      ddddddddd:::::d 
  g:::::::::ggg::::g a::::::::::::a   ss::::::::::s        b::::::::::::::bb    a::::::::::::a   dd::::::::::::::d 
 g:::::::::::::::::g aaaaaaaaa:::::ass:::::::::::::s       b::::::::::::::::b   aaaaaaaaa:::::a d::::::::::::::::d 
g::::::ggggg::::::gg          a::::as::::::ssss:::::s      b:::::bbbbb:::::::b           a::::ad:::::::ddddd:::::d 
g:::::g     g:::::g    aaaaaaa:::::a s:::::s  ssssss       b:::::b    b::::::b    aaaaaaa:::::ad::::::d    d:::::d 
g:::::g     g:::::g  aa::::::::::::a   s::::::s            b:::::b     b:::::b  aa::::::::::::ad:::::d     d:::::d 
g:::::g     g:::::g a::::aaaa::::::a      s::::::s         b:::::b     b:::::b a::::aaaa::::::ad:::::d     d:::::d 
g::::::g    g:::::ga::::a    a:::::assssss   s:::::s       b:::::b     b:::::ba::::a    a:::::ad:::::d     d:::::d 
g:::::::ggggg:::::ga::::a    a:::::as:::::ssss::::::s      b:::::bbbbbb::::::ba::::a    a:::::ad::::::ddddd::::::dd
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    gggggggg::::::g  aaaaaaaaaa  aaaa sssssssssss          bbbbbbbbbbbbbbbb     aaaaaaaaaa  aaaa  ddddddddd   ddddd
            g:::::g                                                                                                
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 */
 // forgefmt: disable-end

interface IERC1155 {
    function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _value, bytes calldata _data) external;
}

/// @title GasliteDrop1155
/// @notice Turbo gas optimized bulk transfers of ERC1155
/// @author Harrison (@PopPunkOnChain)
/// @author 0xjustadev (@0xjustadev)
/// @author Gaslite (@GasliteGG)
/// @author Pop Punk LLC (@PopPunkLLC)
contract GasliteDrop1155 {
    bytes32 private immutable SAFE_TRANSFER_FROM_SELECTOR;

    struct AirdropToken {
        uint256 tokenId;
        AirdropTokenAmount[] airdropAmounts;
    }

    struct AirdropTokenAmount {
        uint256 amount;
        address[] recipients;
    }

    constructor() {
        SAFE_TRANSFER_FROM_SELECTOR = IERC1155.safeTransferFrom.selector;
    }

    /// @notice Airdrop ERC1155 tokens to a list of addresses
    /// @param tokenAddress The address of the ERC1155 contract
    /// @param airdropTokens The tokenIds and amounts to airdrop
    function airdropERC1155(address tokenAddress, AirdropToken[] calldata airdropTokens) external {
        bytes32 safeTransferFromSelector = SAFE_TRANSFER_FROM_SELECTOR;
        assembly {
            mstore(0x00, safeTransferFromSelector)
            mstore(0x04, caller())
            mstore(0x84, 0xA0)

            let tokenArrayCalldataOffsetStart := 0x64
            let tokenArrayCalldataOffset := 0x64
            let tokenArrayCalldataOffsetEnd := add(tokenArrayCalldataOffset, shl(5, calldataload(0x44)))

            for {} 1 {} {
                if eq(tokenArrayCalldataOffset, tokenArrayCalldataOffsetEnd) { break }

                let tokenCalldataOffset := add(tokenArrayCalldataOffsetStart, calldataload(tokenArrayCalldataOffset))
                mstore(0x44, calldataload(tokenCalldataOffset))

                let amountArrayCalldataOffsetStart := add(tokenCalldataOffset, 0x60)
                let amountArrayCalldataOffset := amountArrayCalldataOffsetStart
                let amountArrayCalldataOffsetEnd :=
                    add(amountArrayCalldataOffset, shl(5, calldataload(add(tokenCalldataOffset, 0x40))))

                let tmpTokenAddress := tokenAddress

                for {} 1 {} {
                    if eq(amountArrayCalldataOffset, amountArrayCalldataOffsetEnd) { break }

                    let amountCalldataOffset :=
                        add(amountArrayCalldataOffsetStart, calldataload(amountArrayCalldataOffset))
                    mstore(0x64, calldataload(amountCalldataOffset))

                    let recipientArrayCalldataOffset := add(amountCalldataOffset, 0x60)
                    let recipientArrayCalldataOffsetEnd :=
                        add(recipientArrayCalldataOffset, shl(5, calldataload(add(amountCalldataOffset, 0x40))))

                    for {} 1 {} {
                        if eq(recipientArrayCalldataOffset, recipientArrayCalldataOffsetEnd) { break }

                        mstore(0x24, calldataload(recipientArrayCalldataOffset))
                        if iszero(call(gas(), tmpTokenAddress, 0, 0x00, 0xC4, 0, 0)) { revert(0, 0) }

                        recipientArrayCalldataOffset := add(recipientArrayCalldataOffset, 0x20)
                    }

                    amountArrayCalldataOffset := add(amountArrayCalldataOffset, 0x20)
                }

                tokenArrayCalldataOffset := add(tokenArrayCalldataOffset, 0x20)
            }
        }
    }
}

{
  "viaIR": false,
  "codegen": "yul",
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "@solady/=lib/solady/",
    "@ERC721A/=lib/ERC721A/",
    "@murky/=lib/murky/src/",
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "ERC721A/=lib/ERC721A/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "murky/=lib/murky/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "solady/=lib/solady/"
  ],
  "evmVersion": "shanghai",
  "outputSelection": {
    "*": {
      "*": [
        "abi"
      ]
    }
  },
  "optimizer": {
    "enabled": true,
    "mode": "3",
    "size_fallback": false,
    "disable_system_request_memoization": true
  },
  "metadata": {},
  "libraries": {},
  "enableEraVMExtensions": false,
  "forceEVMLA": false
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"components":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"components":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address[]","name":"recipients","type":"address[]"}],"internalType":"struct GasliteDrop1155.AirdropTokenAmount[]","name":"airdropAmounts","type":"tuple[]"}],"internalType":"struct GasliteDrop1155.AirdropToken[]","name":"airdropTokens","type":"tuple[]"}],"name":"airdropERC1155","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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