ETH Price: $3,578.00 (+1.85%)
Gas: 52 Gwei

Contract

0xA3f154E264702A182DEf8B4395e4bC8043cB04B5
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

Multichain Info

No addresses found
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To
Value
Claim185090972023-11-05 23:32:59143 days ago1699227179IN
0xA3f154E2...043cB04B5
0 ETH0.0063352921.82230111
Claim179837402023-08-24 9:42:59217 days ago1692870179IN
0xA3f154E2...043cB04B5
0 ETH0.0043990315.53697782
Claim163305072023-01-04 2:42:23449 days ago1672800143IN
0xA3f154E2...043cB04B5
0 ETH0.0036321714.55686483
Claim163227552023-01-03 0:44:47450 days ago1672706687IN
0xA3f154E2...043cB04B5
0 ETH0.0036728414.71985898
Claim163164642023-01-02 3:40:47451 days ago1672630847IN
0xA3f154E2...043cB04B5
0 ETH0.0034432313.79966071
Claim163160132023-01-02 2:10:35451 days ago1672625435IN
0xA3f154E2...043cB04B5
0 ETH0.00427617.13719833
Claim163151752023-01-01 23:22:35451 days ago1672615355IN
0xA3f154E2...043cB04B5
0 ETH0.0034970214.01523363
Claim146711922022-04-28 6:10:13700 days ago1651126213IN
0xA3f154E2...043cB04B5
0 ETH0.0055714824
Claim145923792022-04-15 21:28:56712 days ago1650058136IN
0xA3f154E2...043cB04B5
0 ETH0.017337769.48534
Claim142160792022-02-16 8:33:22771 days ago1645000402IN
0xA3f154E2...043cB04B5
0 ETH0.0151806260.84029907
Claim141199602022-02-01 11:56:27786 days ago1643716587IN
0xA3f154E2...043cB04B5
0 ETH0.02727792109.32333375
Claim139371832022-01-04 5:49:04814 days ago1641275344IN
0xA3f154E2...043cB04B5
0 ETH0.0174661270
Claim139262332022-01-02 13:27:35816 days ago1641130055IN
0xA3f154E2...043cB04B5
0 ETH0.02774111.17525649
Claim139253482022-01-02 10:03:34816 days ago1641117814IN
0xA3f154E2...043cB04B5
0 ETH0.0176078470.56801075
Claim139248842022-01-02 8:15:39816 days ago1641111339IN
0xA3f154E2...043cB04B5
0 ETH0.0173646469.59330323
Claim139217102022-01-01 20:30:07816 days ago1641069007IN
0xA3f154E2...043cB04B5
0 ETH0.0175120370.18738736
Claim139216332022-01-01 20:15:16816 days ago1641068116IN
0xA3f154E2...043cB04B5
0 ETH0.02953087118.35261872
Claim139215542022-01-01 19:57:11816 days ago1641067031IN
0xA3f154E2...043cB04B5
0 ETH0.0208790483.68222104
Claim139214982022-01-01 19:44:51816 days ago1641066291IN
0xA3f154E2...043cB04B5
0 ETH0.0154536561.93749892
Claim139213482022-01-01 19:11:22816 days ago1641064282IN
0xA3f154E2...043cB04B5
0 ETH0.0212323285.09812019
Claim139212992022-01-01 18:59:46816 days ago1641063586IN
0xA3f154E2...043cB04B5
0 ETH0.03023171121.16727345
Claim139211792022-01-01 18:34:01816 days ago1641062041IN
0xA3f154E2...043cB04B5
0 ETH0.0169710268.0190531
Claim139211542022-01-01 18:30:05816 days ago1641061805IN
0xA3f154E2...043cB04B5
0 ETH0.0170148268.19461373
Claim139181632022-01-01 7:26:50817 days ago1641022010IN
0xA3f154E2...043cB04B5
0 ETH0.0171858468.88003333
Claim139181582022-01-01 7:24:30817 days ago1641021870IN
0xA3f154E2...043cB04B5
0 ETH0.0139938756.08679199
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Contract Source Code Verified (Exact Match)

Contract Name:
Free2

Compiler Version
v0.8.11+commit.d7f03943

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license
/**
 *Submitted for verification at Etherscan.io on 2022-01-01
*/

// SPDX-License-Identifier: CC0


/*
 /$$$$$$$$ /$$$$$$$  /$$$$$$$$ /$$$$$$$$        /$$$$$$
| $$_____/| $$__  $$| $$_____/| $$_____/       /$$__  $$
| $$      | $$  \ $$| $$      | $$            |__/  \ $$
| $$$$$   | $$$$$$$/| $$$$$   | $$$$$           /$$$$$$/
| $$__/   | $$__  $$| $$__/   | $$__/          /$$____/
| $$      | $$  \ $$| $$      | $$            | $$
| $$      | $$  | $$| $$$$$$$$| $$$$$$$$      | $$$$$$$$
|__/      |__/  |__/|________/|________/      |________/



 /$$
| $$
| $$$$$$$  /$$   /$$
| $$__  $$| $$  | $$
| $$  \ $$| $$  | $$
| $$  | $$| $$  | $$
| $$$$$$$/|  $$$$$$$
|_______/  \____  $$
           /$$  | $$
          |  $$$$$$/
           \______/
  /$$$$$$  /$$$$$$$$ /$$$$$$$$ /$$    /$$ /$$$$$$ /$$$$$$$$ /$$$$$$$
 /$$__  $$|__  $$__/| $$_____/| $$   | $$|_  $$_/| $$_____/| $$__  $$
| $$  \__/   | $$   | $$      | $$   | $$  | $$  | $$      | $$  \ $$
|  $$$$$$    | $$   | $$$$$   |  $$ / $$/  | $$  | $$$$$   | $$$$$$$/
 \____  $$   | $$   | $$__/    \  $$ $$/   | $$  | $$__/   | $$____/
 /$$  \ $$   | $$   | $$        \  $$$/    | $$  | $$      | $$
|  $$$$$$/   | $$   | $$$$$$$$   \  $/    /$$$$$$| $$$$$$$$| $$
 \______/    |__/   |________/    \_/    |______/|________/|__/


CC0 2021
*/


pragma solidity ^0.8.11;

 
interface IFree {
  function mint(uint256 collectionId, address to) external;
  function ownerOf(uint256 tokenId) external returns (address owner);
  function tokenIdToCollectionId(uint256 tokenId) external returns (uint256 collectionId);
  function appendAttributeToToken(uint256 tokenId, string memory attrKey, string memory attrValue) external;
}

// 0x4f857a92269dc9b42edb7fab491679decb46e848
interface INVCMinter {
  function usedIOUs(uint256 iouId) external returns (bool used);
}

interface IIOU {
  function ownerOf(uint256 tokenId) external returns (address owner);
}

interface IFree1 {
  function free0TokenIdUsed(uint256 tokenId) external returns (bool used);
}

contract Free2 {
  IFree public immutable free;
  IFree1 public immutable free1Contract;
  INVCMinter public immutable nvcMinter;
  IIOU public immutable iouContract;

  mapping (uint256 => bool) public usedIOUs;
  mapping(uint256 => bool) public free0TokenIdUsed;

  constructor(address freeAddr, address free1Addr, address iouAddr, address nvcMinterAddr) {
    free = IFree(freeAddr);
    free1Contract = IFree1(free1Addr);
    nvcMinter = INVCMinter(nvcMinterAddr);
    iouContract = IIOU(iouAddr);
  }

  function claim(uint256 iouId, uint256 free0TokenId) public {
    require(iouContract.ownerOf(iouId) == msg.sender, 'You must be the owner of this IOU');
    require(nvcMinter.usedIOUs(iouId), 'You must use an IOU that has minted a NVC');
    require(!usedIOUs[iouId], 'This IOU has already minted a Free2');

    require(free.ownerOf(free0TokenId) == msg.sender, 'You must be the owner of this Free0');
    require(free.tokenIdToCollectionId(free0TokenId) == 0, 'Invalid Free0');
    require(
      free1Contract.free0TokenIdUsed(free0TokenId) == true,
      'You must use a Free0 that has already minted a Free1'

    );
    require(!free0TokenIdUsed[free0TokenId], 'This Free0 has already been used to mint a Free2');
    free.appendAttributeToToken(free0TokenId, 'Used For Free2 Mint', 'true');


    usedIOUs[iouId] = true;
    free0TokenIdUsed[free0TokenId] = true;

    free.mint(2, msg.sender);
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"freeAddr","type":"address"},{"internalType":"address","name":"free1Addr","type":"address"},{"internalType":"address","name":"iouAddr","type":"address"},{"internalType":"address","name":"nvcMinterAddr","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"uint256","name":"iouId","type":"uint256"},{"internalType":"uint256","name":"free0TokenId","type":"uint256"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"free","outputs":[{"internalType":"contract IFree","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"free0TokenIdUsed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"free1Contract","outputs":[{"internalType":"contract IFree1","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"iouContract","outputs":[{"internalType":"contract IIOU","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nvcMinter","outputs":[{"internalType":"contract INVCMinter","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"usedIOUs","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000030b541f1182ef19c56a39634b2fdaca5a0f2a741000000000000000000000000fe503b926187a9cc9b10b5baf1c34f7b90d9a81000000000000000000000000013178ab07a88f065efe6d06089a6e6ab55ae8a150000000000000000000000004f857a92269dc9b42edb7fab491679decb46e848

-----Decoded View---------------
Arg [0] : freeAddr (address): 0x30b541f1182ef19c56a39634B2fdACa5a0F2A741
Arg [1] : free1Addr (address): 0xFE503B926187A9Cc9b10b5baF1C34f7B90d9a810
Arg [2] : iouAddr (address): 0x13178AB07A88f065EFe6D06089a6e6AB55AE8a15
Arg [3] : nvcMinterAddr (address): 0x4F857a92269DC9B42EDB7fab491679DEcb46e848

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 00000000000000000000000030b541f1182ef19c56a39634b2fdaca5a0f2a741
Arg [1] : 000000000000000000000000fe503b926187a9cc9b10b5baf1c34f7b90d9a810
Arg [2] : 00000000000000000000000013178ab07a88f065efe6d06089a6e6ab55ae8a15
Arg [3] : 0000000000000000000000004f857a92269dc9b42edb7fab491679decb46e848


Deployed Bytecode Sourcemap

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Swarm Source

ipfs://397d5806b481cfa05eae159daf0232fba111a318039b092a58bcddf21c691e35

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Txn Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.