proxmox/docs/01-getting-started/METAMASK_QUICK_START_GUIDE.md

MetaMask Quick Start Guide - ChainID 138

Last Updated: 2026-01-31
Document Version: 1.0
Status: Active Documentation

---

Date: $(date)
Network: SMOM-DBIS-138 (ChainID 138)
Purpose: Get started with MetaMask on ChainID 138 in 5 minutes

---

🚀 Quick Start (5 Minutes)

Step 1: Add Network to MetaMask

Option A: Manual Addition (Recommended for first-time users)

1. Open MetaMask extension
2. Click network dropdown (top of MetaMask)
3. Click "Add Network" → "Add a network manually"
4. Enter the following:
   • Network Name: Defi Oracle Meta Mainnet or SMOM-DBIS-138
   • RPC URL: https://rpc-http-pub.d-bis.org ⚠️ Important: Must be public endpoint
   • Chain ID: 138 (must be decimal, not hex)
   • Currency Symbol: ETH
   • Block Explorer URL: https://explorer.d-bis.org (optional)
5. Click "Save"

Note: If you get "Could not fetch chain ID" error, the RPC endpoint may require authentication. The public endpoint (rpc-http-pub.d-bis.org) should NOT require authentication. If it does, contact network administrators.

Option B: Programmatic Addition (For dApps)

If you're building a dApp, you can add the network programmatically:

await window.ethereum.request({
  method: 'wallet_addEthereumChain',
  params: [{
    chainId: '0x8a', // 138 in hex
    chainName: 'SMOM-DBIS-138',
    nativeCurrency: {
      name: 'Ether',
      symbol: 'ETH',
      decimals: 18
    },
    rpcUrls: ['https://rpc-http-pub.d-bis.org'],
    blockExplorerUrls: ['https://explorer.d-bis.org']
  }]
});

---

Step 2: Import Tokens

WETH9 (Wrapped Ether)

1. In MetaMask, click "Import tokens"
2. Enter:
   • Token Contract Address: 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
   • Token Symbol: WETH
   • Decimals of Precision: 18 ⚠️ Important: Must be 18
3. Click "Add Custom Token"

WETH10 (Wrapped Ether v10)

1. Click "Import tokens" again
2. Enter:
   • Token Contract Address: 0xf4BB2e28688e89fCcE3c0580D37d36A7672E8A9f
   • Token Symbol: WETH10
   • Decimals of Precision: 18
3. Click "Add Custom Token"

Note: If you see incorrect balances (like "6,000,000,000.0T"), ensure decimals are set to 18. See WETH9 Display Fix for details.

---

Step 3: Get Test ETH

For Testing Purposes:

If you need test ETH on ChainID 138:

1. Contact network administrators
2. Use a faucet (if available)
3. Bridge from another chain (if configured)

Current Network Status:

• ✅ Network: Operational
• ✅ RPC: https://rpc-core.d-bis.org
• ✅ Explorer: https://explorer.d-bis.org

---

Step 4: Verify Connection

Check Network:

1. In MetaMask, verify you're on "SMOM-DBIS-138"
2. Check your ETH balance (should display correctly)
3. Verify token balances (WETH, WETH10)

Test Transaction (Optional):

1. Send a small amount of ETH to another address
2. Verify transaction appears in block explorer
3. Confirm balance updates

---

📊 Reading Price Feeds

Get ETH/USD Price

Oracle Contract: 0x3304b747e565a97ec8ac220b0b6a1f6ffdb837e6

Using Web3.js:

const Web3 = require('web3');
const web3 = new Web3('https://rpc-core.d-bis.org');

const oracleABI = [{
  "inputs": [],
  "name": "latestRoundData",
  "outputs": [
    {"name": "roundId", "type": "uint80"},
    {"name": "answer", "type": "int256"},
    {"name": "startedAt", "type": "uint256"},
    {"name": "updatedAt", "type": "uint256"},
    {"name": "answeredInRound", "type": "uint80"}
  ],
  "stateMutability": "view",
  "type": "function"
}];

const oracle = new web3.eth.Contract(oracleABI, '0x3304b747e565a97ec8ac220b0b6a1f6ffdb837e6');

async function getPrice() {
  const result = await oracle.methods.latestRoundData().call();
  const price = result.answer / 1e8; // Convert from 8 decimals
  console.log(`ETH/USD: $${price}`);
  return price;
}

getPrice();

Using Ethers.js:

const { ethers } = require('ethers');
const provider = new ethers.providers.JsonRpcProvider('https://rpc-core.d-bis.org');

const oracleABI = [
  "function latestRoundData() external view returns (uint80, int256, uint256, uint256, uint80)"
];

const oracle = new ethers.Contract(
  '0x3304b747e565a97ec8ac220b0b6a1f6ffdb837e6',
  oracleABI,
  provider
);

async function getPrice() {
  const result = await oracle.latestRoundData();
  const price = result.answer.toNumber() / 1e8;
  console.log(`ETH/USD: $${price}`);
  return price;
}

getPrice();

---

🔧 Common Tasks

Send ETH

1. Click "Send" in MetaMask
2. Enter recipient address
3. Enter amount
4. Review gas fees
5. Confirm transaction

Wrap ETH to WETH9

1. Go to WETH9 contract: 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
2. Call deposit() function
3. Send ETH amount with transaction
4. Receive WETH9 tokens

Check Transaction Status

1. Copy transaction hash from MetaMask
2. Visit: https://explorer.d-bis.org/tx/<tx-hash>
3. View transaction details, gas used, status

---

⚠️ Troubleshooting

Network Not Connecting

Issue: Can't connect to network

Solutions:

1. Verify RPC URL: https://rpc-core.d-bis.org
2. Check Chain ID: Must be 138 (not 0x8a in decimal)
3. Try removing and re-adding network
4. Clear MetaMask cache and reload

Token Balance Display Incorrect

Issue: Shows "6,000,000,000.0T WETH" instead of "6 WETH"

Solution:

• Remove token from MetaMask
• Re-import with decimals set to 18
• See WETH9 Display Fix for details

Price Feed Not Updating

Issue: Oracle price seems stale

Solutions:

1. Check Oracle contract: 0x3304b747e565a97ec8ac220b0b6a1f6ffdb837e6
2. Verify updatedAt timestamp is recent (within 60 seconds)
3. Check Oracle Publisher service status

Transaction Failing

Issue: Transactions not going through

Solutions:

1. Check you have sufficient ETH for gas
2. Verify network is selected correctly
3. Check transaction nonce (may need to reset)
4. Increase gas limit if needed

---

📚 Additional Resources

• MetaMask Troubleshooting Guide (integration, Oracle, WETH9 fixes)
• Contract Addresses Reference

---

✅ Verification Checklist

After setup, verify:

• Network "SMOM-DBIS-138" appears in MetaMask
• Can switch to ChainID 138 network
• ETH balance displays correctly
• WETH9 token imported with correct decimals (18)
• WETH10 token imported with correct decimals (18)
• Can read price from Oracle contract
• Can send test transaction
• Transaction appears in block explorer

---

🎯 Next Steps

1. Explore dApps: Connect to dApps built on ChainID 138
2. Bridge Assets: Use CCIP bridges to transfer assets cross-chain
3. Deploy Contracts: Deploy your own smart contracts
4. Build dApps: Create applications using the network

---

Last Updated: $(date)