Contract Addresses

All TAG IT smart contracts are verified and open source. Find the official addresses below.

Base Sepolia Testnet Contracts

TAG IT Network's smart contracts are live on Base Sepolia (chainId 84532). The addresses below are the upgradeable proxies that consumers should interact with. All contracts are verified on BaseScan.

Base Mainnet

Base Mainnet (chainId 8453) deployment is planned for after the DAO launch and is not yet live. Production addresses will be published here once deployed and audited.

Contract Verification

All TAG IT contracts are verified on BaseScan. You can view the source code, read contract state, and interact with contracts directly:

• TAGITCore on BaseScan
• TAGITAccess on BaseScan
• TAGITToken on BaseScan
• TAGITGovernor on BaseScan

Archived Deployments

TAG IT previously deployed to OP Sepolia and Arbitrum Sepolia. Those deployments were deprecated on 2026-06-27 when Base Sepolia became the canonical home. The historical addresses are retained in the tagit-contracts repository for reference; do not use them for new integrations.

Integrating with Contracts

Here's how to connect to TAG IT contracts on Base Sepolia using ethers.js:

// Import ethers.js
import { ethers } from 'ethers';

// Import contract ABIs (see ABI Reference for full ABIs)
import TAGITCoreABI from './abis/TAGITCore.json';
import TAGITAccessABI from './abis/TAGITAccess.json';

// Contract addresses (Base Sepolia, chainId 84532)
const CONTRACTS = {
  tagitCore: '0x3aDc7EFDb58Ae85483eFf5D4966D916185f31d1D',
  tagitAccess: '0xb56A1D91995C212342FaA843468F03521340A1D6',
  tagitToken: '0x5f98B83cD7Aef769cc51D2FB739BA49D561170DE',
  tagitGovernor: '0xCF67DF870EccBB7838c3ab7876467c89d84dce89'
};

// Connect to Base Sepolia
const provider = new ethers.JsonRpcProvider('https://sepolia.base.org');

// For read-only operations
const tagitCore = new ethers.Contract(
  CONTRACTS.tagitCore,
  TAGITCoreABI,
  provider
);

// Example: read an asset's owner, timestamp and lifecycle state.
// getAsset returns a 5-field tuple; state is the lifecycle enum 0-6.
async function readAsset(tokenId) {
  const [assetOwner, timestamp, state, flags, reserved] =
    await tagitCore.getAsset(tokenId);

  return { assetOwner, timestamp, state, flags, reserved };
}

// Example: resolve a physical tag to its token.
// tagHash is keccak256 of the chip's raw 7-byte UID.
async function tokenForTag(tagHash) {
  return await tagitCore.getTokenByTag(tagHash);
}