Adding MI4 (#16764)

Co-authored-by: Ariel Lipschutz <ariellipschutz@gmail.com>

projects/mi4/abi.json

@@ -0,0 +1,4 @@
+{
+  "latestRoundData": "function latestRoundData() view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)",
+  "priceDecimals": "function decimals() view returns (uint8)"
+}

projects/mi4/index.js

@@ -0,0 +1,74 @@
+const abi = require('./abi.json');
+
+const MI4_ADDRESSES = {
+  mantle: {
+    token: '0x671642Ac281C760e34251d51bC9eEF27026F3B7a',
+    priceFeed: '0x24c8964338Deb5204B096039147B8e8C3AEa42Cc'
+  }
+};
+
+async function tvl(api) {
+  const { chain } = api;
+  const chainAddresses = MI4_ADDRESSES[chain];
+
+  if (!chainAddresses) {
+    console.log(`No MI4 addresses configured for chain: ${chain}`);
+    return {};
+  }
+
+  try {
+    // Get total supply of MI4 tokens
+    const totalSupply = await api.call({
+      abi: 'erc20:totalSupply',
+      target: chainAddresses.token,
+    });
+
+    // Get price from price feed using your custom ABI
+    const priceData = await api.call({
+      abi: abi.latestRoundData,
+      target: chainAddresses.priceFeed,
+    });
+
+    // Get price decimals from the feed
+    const priceDecimals = await api.call({
+      abi: abi.priceDecimals,
+      target: chainAddresses.priceFeed,
+    });
+
+    // Get token decimals
+    const tokenDecimals = await api.call({
+      abi: 'erc20:decimals',
+      target: chainAddresses.token,
+    });
+
+    console.log(`MI4 Total Supply on ${chain}: ${totalSupply}`);
+    console.log(`MI4 Latest Price: ${priceData.answer} (decimals: ${priceDecimals})`);
+    console.log(`Token decimals: ${tokenDecimals}, Price decimals: ${priceDecimals}`);
+
+    // Calculate the price per token in USD
+    const pricePerTokenUsd = Number(priceData.answer) / (10 ** Number(priceDecimals));
+    
+    // Calculate actual token supply
+    const tokenSupplyFloat = Number(totalSupply) / (10 ** Number(tokenDecimals));
+    
+    // Calculate TVL in USD
+    const tvlUsd = tokenSupplyFloat * pricePerTokenUsd;
+    
+    console.log(`Price per MI4 token: $${pricePerTokenUsd}`);
+    console.log(`Token supply: ${tokenSupplyFloat.toLocaleString()} MI4`);
+    console.log(`Calculated TVL: $${tvlUsd.toLocaleString()}`);
+
+    // Return TVL as USD value
+    api.addUSDValue(tvlUsd);
+
+  } catch (error) {
+    console.error(`Error calculating TVL for ${chain}:`, error.message);
+  }
+
+  return api.getBalances();
+}
+
+module.exports = {
+  methodology: 'TVL is calculated as the total supply of MI4 tokens multiplied by the price of MI4 from the price feed contract.',
+  mantle: { tvl },
+};