Source-verified smart contracts for transparency and better UX in web3

Sourcify enables transparent and human-readable smart contract interactions through automated Solidity contract verification, contract metadata, and NatSpec comments.

pragma solidity >=0.7.0 <0.9.0;

/**
 * @title Storage
 * @dev Store & retrieve value in a variable
 */
contract Storage {
    uint256 number;
    /**
     * @dev Store value in variable
     * @param num value to store
     */
    function store(uint256 num) public {
        number = num;
    }
    /**
     * @dev Return value 
     * @return value of 'number'
     */
    function retrieve() public view returns (uint256){
        return number;
    }
}

Contract fully verified

Ethereum Görli
0x00878Ac0D6B8d981ae72BA7cDC967eA0Fae69df4

metadata.json

{
  "compiler": { "version": "0.8.4+commit.c7e474f2" },
  "language": "Solidity",
  "output": {
    "abi": [
      {
        "inputs": [],
        "name": "retrieve",
        "outputs": [
          { "internalType": "uint256", "name": "", "type": "uint256" }
        ],
        "stateMutability": "view",
        "type": "function"
      },
      {
        "inputs": [
          { "internalType": "uint256", "name": "num", "type": "uint256" }
        ],
        "name": "store",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
      }
    ],
    "devdoc": {
      "details": "Store & retrieve value in a variable",
      "kind": "dev",
      "methods": {
        "retrieve()": {
          "details": "Return value ",
          "returns": { "_0": "value of 'number'" }
        },
        "store(uint256)": {
          "details": "Store value in variable",
          "params": { "num": "value to store" }
        }
      },
      "title": "Storage",
      "version": 1
    },
    "userdoc": { "kind": "user", "methods": {}, "version": 1 }
  },

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Fully open-source and decentralized

Sourcify's code is fully open-sourced. The repository of verified contracts is completely public and decentralized by being served over IPFS.

Next-level smart contract verification

Full matches on Sourcify cryptographically guarantee the verified source code is identical to the original deployed contract. Our monitoring service observes contract creations and verifies the source codes automatically if published to IPFS.

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Human-readable contract interactions

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