Contract

0x18eB230775167eccED408817f47158Da61A7AAE6

Source Code

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ContractCreator

0x68136BF5...46eCF567F at txn 0x04658a1ace817ce067c2c8070c05a2c57cfa5a095841702eb2de52fa85b1f7c0

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	Transaction Hash	Method	Block		From		To
	0x04658a1ace817ce067c2c8070c05a2c57cfa5a095841702eb2de52fa85b1f7c0	0x60806040	15614289	2022-09-26 1:33:23	664 days ago	1664156003	0x68136BF5...46eCF567F	IN	Contract Creation	0 ETH$0.00	0.00200551	6

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x4F8Eb740...e9bee7C8a
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:

NounsSeeder

Compiler Version

v0.8.15+commit.e14f2714

Optimization Enabled:

Yes with 10000 runs

Other Settings:

default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

IDE

File 1 of 3 : NounsSeeder.sol

// SPDX-License-Identifier: GPL-3.0

/// @title The NounsToken pseudo-random seed generator

/*********************************
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 *********************************/

pragma solidity ^0.8.6;

import { INounsSeeder } from './interfaces/INounsSeeder.sol';
import { INounsDescriptorMinimal } from './interfaces/INounsDescriptorMinimal.sol';

contract NounsSeeder is INounsSeeder {
    /**
     * @notice Generate a pseudo-random Noun seed using the previous blockhash and noun ID.
     */
    // prettier-ignore
    function generateSeed(uint256 nounId, INounsDescriptorMinimal descriptor) external view override returns (Seed memory) {
        uint256 pseudorandomness = uint256(
            keccak256(abi.encodePacked(blockhash(block.number - 1), nounId))
        );

        uint256 backgroundCount = descriptor.backgroundCount();
        uint256 bodyCount = descriptor.bodyCount();
        uint256 accessoryCount = descriptor.accessoryCount();
        uint256 headCount = descriptor.headCount();
        uint256 glassesCount = descriptor.glassesCount();

        return Seed({
            background: uint48(
                uint48(pseudorandomness) % backgroundCount
            ),
            body: uint48(
                uint48(pseudorandomness >> 48) % bodyCount
            ),
            accessory: uint48(
                uint48(pseudorandomness >> 96) % accessoryCount
            ),
            head: uint48(
                uint48(pseudorandomness >> 144) % headCount
            ),
            glasses: uint48(
                uint48(pseudorandomness >> 192) % glassesCount
            )
        });
    }
}

File 2 of 3 : INounsSeeder.sol

// SPDX-License-Identifier: GPL-3.0

/// @title Interface for NounsSeeder

/*********************************
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 *********************************/

pragma solidity ^0.8.6;

import { INounsDescriptorMinimal } from './INounsDescriptorMinimal.sol';

interface INounsSeeder {
    struct Seed {
        uint48 background;
        uint48 body;
        uint48 accessory;
        uint48 head;
        uint48 glasses;
    }

    function generateSeed(uint256 nounId, INounsDescriptorMinimal descriptor) external view returns (Seed memory);
}

File 3 of 3 : INounsDescriptorMinimal.sol

// SPDX-License-Identifier: GPL-3.0

/// @title Common interface for NounsDescriptor versions, as used by NounsToken and NounsSeeder.

/*********************************
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 *********************************/

pragma solidity ^0.8.6;

import { INounsSeeder } from './INounsSeeder.sol';

interface INounsDescriptorMinimal {
    ///
    /// USED BY TOKEN
    ///

    function tokenURI(uint256 tokenId, INounsSeeder.Seed memory seed) external view returns (string memory);

    function dataURI(uint256 tokenId, INounsSeeder.Seed memory seed) external view returns (string memory);

    ///
    /// USED BY SEEDER
    ///

    function backgroundCount() external view returns (uint256);

    function bodyCount() external view returns (uint256);

    function accessoryCount() external view returns (uint256);

    function headCount() external view returns (uint256);

    function glassesCount() external view returns (uint256);
}

Settings

{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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Contract ABI

[{"inputs":[{"internalType":"uint256","name":"nounId","type":"uint256"},{"internalType":"contract INounsDescriptorMinimal","name":"descriptor","type":"address"}],"name":"generateSeed","outputs":[{"components":[{"internalType":"uint48","name":"background","type":"uint48"},{"internalType":"uint48","name":"body","type":"uint48"},{"internalType":"uint48","name":"accessory","type":"uint48"},{"internalType":"uint48","name":"head","type":"uint48"},{"internalType":"uint48","name":"glasses","type":"uint48"}],"internalType":"struct INounsSeeder.Seed","name":"","type":"tuple"}],"stateMutability":"view","type":"function"}]

Deployed Bytecode

Decompile Bytecode

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