Deployment Addresses

The Open Agent Trust Protocol is currently deployed on Base Sepolia testnet for immediate testing and development.

Base Sepolia Testnet

Contract Addresses

Contract	Address	Explorer
Interaction Registry	0x12F5C3fD1893bf9b2DeaA43AE1A2CCb122C3E707	View on BaseScan
Attestation Schema Registry	0x64DaE82fE64D2fE96f90017FE51069C107BFe9d5	View on BaseScan
Trust Graph	0x8DC39B04A9C32e16DD7bd8906a8ea0d9DE6cCbDF	View on BaseScan

Network Details

Parameter	Value
Network Name	Base Sepolia
Chain ID	84532
Currency Symbol	ETH
RPC URL	https://sepolia.base.org
Block Explorer	https://sepolia.basescan.org
Faucet	Base Sepolia Faucet

SDK Configuration

Use these addresses to initialize the SDK:

import { AgentTrustSDK } from '@open-agent-economy/trust-sdk';

const sdk = new AgentTrustSDK({
  rpcUrl: 'https://sepolia.base.org',
  privateKey: process.env.AGENT_PRIVATE_KEY!,
  contracts: {
    interactionRegistry: '0x12F5C3fD1893bf9b2DeaA43AE1A2CCb122C3E707',
    attestationSchemaRegistry: '0x64DaE82fE64D2fE96f90017FE51069C107BFe9d5',
    trustGraph: '0x8DC39B04A9C32e16DD7bd8906a8ea0d9DE6cCbDF'
  }
});

Environment Variables

Create a .env file with these values:

# Network
RPC_URL=https://sepolia.base.org
CHAIN_ID=84532

# Your agent's credentials
AGENT_PRIVATE_KEY=0x...

# Contract Addresses (Base Sepolia)
INTERACTION_REGISTRY=0x12F5C3fD1893bf9b2DeaA43AE1A2CCb122C3E707
ATTESTATION_REGISTRY=0x64DaE82fE64D2fE96f90017FE51069C107BFe9d5
TRUST_GRAPH=0x8DC39B04A9C32e16DD7bd8906a8ea0d9DE6cCbDF

Then use in your code:

import 'dotenv/config';

const sdk = new AgentTrustSDK({
  rpcUrl: process.env.RPC_URL!,
  privateKey: process.env.AGENT_PRIVATE_KEY!,
  contracts: {
    interactionRegistry: process.env.INTERACTION_REGISTRY!,
    attestationSchemaRegistry: process.env.ATTESTATION_REGISTRY!,
    trustGraph: process.env.TRUST_GRAPH!
  }
});

Why Base Sepolia?

Benefits of Base

• Low Cost: Transactions cost a fraction of a cent
• Fast: 2-second block times
• EVM Compatible: Works with all Ethereum tools
• Coinbase Backed: Reliable infrastructure
• Easy Onboarding: Simple faucet access

Base Sepolia Testnet Features

• Free ETH: Get testnet ETH from faucets
• No Risk: Test without real money
• Fast Iteration: Deploy and test quickly
• Production-like: Same behavior as mainnet

Getting Testnet ETH

Your agent needs ETH to pay for transaction gas fees.

Option 1: Base Sepolia Faucet

1. Visit: https://www.coinbase.com/faucets/base-sepolia-faucet
2. Connect wallet or enter address
3. Complete verification
4. Receive 0.05-0.1 ETH

Option 2: Bridge from Sepolia

If you have Sepolia ETH:

1. Get Sepolia ETH: https://sepoliafaucet.com
2. Bridge to Base: https://bridge.base.org/deposit
3. Switch to Base Sepolia network

Option 3: Multi-Chain Faucets

• QuickNode: https://faucet.quicknode.com/base/sepolia
• Alchemy: https://www.alchemy.com/faucets/base-sepolia
• Chainlist: https://chainlist.org (search "Base Sepolia")

Contract ABIs

The SDK includes contract ABIs, but if you need them separately:

Interaction Registry ABI

Located in the SDK at: node_modules/@open-agent-economy/trust-sdk/dist/contracts/InteractionRegistry.json

Attestation Schema Registry ABI

Located in the SDK at: node_modules/@open-agent-economy/trust-sdk/dist/contracts/AttestationSchemaRegistry.json

Trust Graph ABI

Located in the SDK at: node_modules/@open-agent-economy/trust-sdk/dist/contracts/TrustGraph.json

Verifying Contracts

All contracts are verified on BaseScan. You can:

1. View source code
2. Read contract state
3. Write to contract (if you have ETH)
4. View transaction history

Example: View Interaction Count

1. Go to: https://sepolia.basescan.org/address/0x12F5C3fD1893bf9b2DeaA43AE1A2CCb122C3E707#readContract
2. Connect wallet (optional, for read operations)
3. Call getInteraction with two addresses
4. View interaction count and details

Gas Costs

Approximate gas costs on Base Sepolia:

Operation	Gas Used	ETH Cost	USD Cost
Register Interaction	~50,000	~0.0001 ETH	~$0.0002
Submit Attestation	~80,000	~0.00016 ETH	~$0.0003
Set Trust	~45,000	~0.00009 ETH	~$0.00018
Register Schema	~100,000	~0.0002 ETH	~$0.0004
Query (read)	0	0 ETH	$0

TIP

0.1 ETH on Base Sepolia is enough for approximately 600+ transactions!

Future Deployments

Coming Soon

• Base Mainnet: Production deployment (Q2 2024)
• Optimism: Layer 2 deployment
• Arbitrum: Additional L2 option
• Polygon: EVM sidechain support

Multi-Chain Strategy

The protocol is designed to be chain-agnostic. Future versions will support:

• Cross-chain agent identity
• Multi-chain reputation aggregation
• Bridge-based trust transfer

Upgradeability

Current Status

Contracts on Base Sepolia are non-upgradeable to ensure:

• Immutable history
• Predictable behavior
• No rug-pull risk

New Features

New features will be deployed as:

• Additional contracts (modular design)
• Optional extensions
• Backward compatible

Monitoring

Block Explorer

Monitor all on-chain activity:

• Base Sepolia Explorer: https://sepolia.basescan.org

Search by:

• Transaction hash
• Wallet address
• Contract address
• Block number

Network Status

Check network health:

• Base Status: https://status.base.org
• RPC Health: https://chainlist.org/chain/84532

Developer Tools

Hardhat Configuration

// hardhat.config.js
require("@nomicfoundation/hardhat-toolbox");

module.exports = {
  networks: {
    baseSepolia: {
      url: "https://sepolia.base.org",
      accounts: [process.env.PRIVATE_KEY],
      chainId: 84532
    }
  },
  etherscan: {
    apiKey: {
      baseSepolia: process.env.BASESCAN_API_KEY
    }
  }
};

Foundry Configuration

# foundry.toml
[profile.default]
src = "src"
out = "out"
libs = ["lib"]

[rpc_endpoints]
base_sepolia = "https://sepolia.base.org"

[etherscan]
base_sepolia = { key = "${BASESCAN_API_KEY}", chain = 84532 }

Web3.py Configuration

from web3 import Web3

# Connect to Base Sepolia
w3 = Web3(Web3.HTTPProvider('https://sepolia.base.org'))

# Verify connection
print(f"Connected: {w3.is_connected()}")
print(f"Chain ID: {w3.eth.chain_id}")

# Load contract
interaction_registry = w3.eth.contract(
    address='0x12F5C3fD1893bf9b2DeaA43AE1A2CCb122C3E707',
    abi=interaction_registry_abi
)

Support & Resources

Official Links

• Documentation: https://docs.open-agent-economy.org
• GitHub: https://github.com/Open-Agent-Economy/open-agent-trust
• NPM Package: https://www.npmjs.com/package/@open-agent-economy/trust-sdk

Base Resources

• Base Docs: https://docs.base.org
• Base Discord: https://discord.gg/buildonbase
• Base Twitter: https://twitter.com/base

Getting Help

• Issues: GitHub Issues
• Discussions: GitHub Discussions

Testing Checklist

Before going to production, verify:

• [ ] Contracts are correct addresses
• [ ] Network is Base Sepolia (Chain ID: 84532)
• [ ] Agent wallet has testnet ETH
• [ ] RPC endpoint is responding
• [ ] Transactions are being confirmed
• [ ] Read operations return expected data
• [ ] Explorer shows your transactions

Next Steps

Now that you know the deployment details:

1. Get Testnet ETH - Fund your agent wallet
2. Quick Start - Start building
3. Test Your Integration - Verify everything works