Deployed Contracts

Base Sepolia Testnet Deployment

The Skyocean smart contract architecture has been deployed to the Base Sepolia Testnet for testing and demonstration purposes. Below are the deployed contract addresses and instructions for interacting with them.

Contract Addresses

Contract	Address
SkyoceanToken	0x3E419e3Ef9F638007050D53a696E492270e11870
TradeAgreement	0x19a191c66093CEF91095C524f326A96F63992Fdb
DocumentVerificationRegistry	0x6a1FeA5Ac170D8F7bf10aa8490d14FB8A1b8B05E
KnowledgeAssetRegistry	0xFB33433a4Ee4Ca67649F9c6ad6e21096Af54Ab82
TokenManagementSystem	0x8052cBaA0Ac0050951f24EEC17Cc0e227AeFC439

Network Information

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

Interacting with the Contracts

You can interact with these contracts using various methods:

1. Web Interface (coming soon)
2. Hardhat Scripts (locally)
3. Programmatic API (via ethers.js)
4. Block Explorer (via Basescan)

Adding Base Sepolia to MetaMask

To interact with the contracts using MetaMask:

1. Open MetaMask
2. Click on the network dropdown at the top
3. Select “Add Network”
4. Click “Add Network Manually” and enter the following:
   • Network Name: Base Sepolia Testnet
   • RPC URL: https://sepolia.base.org
   • Chain ID: 84532
   • Currency Symbol: ETH
   • Block Explorer URL: https://sepolia.basescan.org

Getting Test ETH

To get test ETH for the Base Sepolia Testnet:

1. Get Sepolia ETH from Alchemy Sepolia Faucet
2. Bridge your Sepolia ETH to Base Sepolia using the Base Bridge

Using Hardhat Scripts

You can interact with the deployed contracts using Hardhat scripts. Example:

const { ethers } = require("hardhat");

async function main() {
  // Contract ABIs are in the artifacts directory
  const SkyoceanToken = await ethers.getContractFactory("SkyoceanToken");
  
  // Connect to the deployed contract
  const tokenContract = SkyoceanToken.attach("0x3E419e3Ef9F638007050D53a696E492270e11870");
  
  // Call contract functions
  const balance = await tokenContract.balanceOf("YOUR_ADDRESS_HERE");
  console.log("Token balance:", balance.toString());
}

main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

Run this script with: npx hardhat run scripts/yourScript.js --network baseSepolia

Using ethers.js in Your Application

To interact with the contracts in a frontend or Node.js application:

const { ethers } = require("ethers");
const SkyoceanTokenABI = require("./abis/SkyoceanToken.json");

async function getTokenBalance() {
  // Connect to Base Sepolia
  const provider = new ethers.providers.JsonRpcProvider("https://sepolia.base.org");
  
  // Connect to the contract
  const tokenContract = new ethers.Contract(
    "0x3E419e3Ef9F638007050D53a696E492270e11870",
    SkyoceanTokenABI,
    provider
  );
  
  // Read the balance
  const balance = await tokenContract.balanceOf("YOUR_ADDRESS_HERE");
  console.log("Token balance:", ethers.utils.formatEther(balance));
}

getTokenBalance().catch(console.error);

Contract Interaction Examples

Below are some common interactions with the deployed contracts:

Creating a Transaction

const TradeAgreement = await ethers.getContractFactory("TradeAgreement");
const tradeAgreement = TradeAgreement.attach("0x19a191c66093CEF91095C524f326A96F63992Fdb");

const tx = await tradeAgreement.createTransaction(
  "DKG:example:123", // Knowledge Asset UAL
  "", // Buyer off-chain ID (empty for on-chain payment)
  "0xYourBuyerAddress", // Buyer wallet address
  "0xYourSellerAddress", // Seller address
  4, // Payment method (4 = OnChainEscrow)
  ethers.utils.parseEther("1000"), // Financing amount
  350 // Reward rate (3.5%)
);

const receipt = await tx.wait();
console.log("Transaction created:", receipt);

Staking Tokens as a Financier

// First approve token spending
const SkyoceanToken = await ethers.getContractFactory("SkyoceanToken");
const token = SkyoceanToken.attach("0x3E419e3Ef9F638007050D53a696E492270e11870");

await token.approve(
  "0x8052cBaA0Ac0050951f24EEC17Cc0e227AeFC439", // TokenManagementSystem address
  ethers.utils.parseEther("1000") // Amount to stake
);

// Then stake the tokens
const TokenManagementSystem = await ethers.getContractFactory("TokenManagementSystem");
const tokenManagement = TokenManagementSystem.attach("0x8052cBaA0Ac0050951f24EEC17Cc0e227AeFC439");

await tokenManagement.stakeTokens(
  "0xYourTransactionId", // Transaction ID
  "0xYourFinancierAddress", // Financier address
  ethers.utils.parseEther("1000") // Amount to stake
);

Submitting Documents

const DocumentVerificationRegistry = await ethers.getContractFactory("DocumentVerificationRegistry");
const docRegistry = DocumentVerificationRegistry.attach("0x6a1FeA5Ac170D8F7bf10aa8490d14FB8A1b8B05E");

await docRegistry.submitDocument(
  "0xYourTransactionId", // Transaction ID
  "Invoice", // Document type
  "0xHashOfDocument", // Document hash
  "ipfs://QmYourIpfsHash" // IPFS hash
);

Testing with the DKG

For instructions on how to test the integration between these smart contracts and the Decentralized Knowledge Graph (DKG), please refer to the DKG Workflow.

Next Steps

Now that the contracts are deployed, you can:

1. Test the contract interactions using the examples above
2. Integrate with the DKG for document verification
3. Build a frontend for easy interaction with the smart contracts
4. Develop additional test cases for comprehensive validation

For any questions or issues, please contact the development team.