Add Shift Protocol TVL adapter

projects/shift-protocol/config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  base: [
+    "0xaf69Bf9ea9E0166498c0502aF5B5945980Ed1E0E",
+  ],
+};

projects/shift-protocol/index.js

@@ -0,0 +1,79 @@
+const sdk = require('@defillama/sdk');
+const { formatUnits } = require('ethers');
+const contractsByChain = require('./config');
+
+function getChainTvlFunction(chain) {
+  return async (_timestamp, _ethBlock, chainBlocks) => {
+    const block = chainBlocks[chain];
+    let totalTvl = 0;
+
+    const addresses = contractsByChain[chain] || [];
+    for (const address of addresses) {
+      // totalSupply using standard ERC20 short ABI
+      let totalSupply;
+      try {
+        totalSupply = await sdk.api.abi.call({
+          target: address,
+          abi: 'erc20:totalSupply',
+          block,
+          chain,
+        });
+      } catch (e) {
+        // no totalSupply -> skip this contract
+        console.warn(`totalSupply() missing for ${address} on ${chain}: ${e.message || e}`);
+        continue;
+      }
+
+      // decimals using standard ERC20 short ABI (fallback to 18 if fails)
+      let decimals = 18;
+      try {
+        const decRes = await sdk.api.abi.call({
+          target: address,
+          abi: 'erc20:decimals',
+          block,
+          chain,
+        });
+        decimals = Number(decRes.output);
+      } catch (e) {
+        console.warn(`decimals() missing for ${address} on ${chain}, defaulting to 18: ${e.message || e}`);
+        decimals = 18;
+      }
+
+      // getSharePrice() - custom function, format with 6 decimals
+      let sharePrice = 0;
+      try {
+        const spRes = await sdk.api.abi.call({
+          target: address,
+          abi: 'function getSharePrice() view returns (uint256)',
+          block,
+          chain,
+        });
+        // format with 6 decimals as requested
+        sharePrice = Number(formatUnits(spRes.output, 6));
+      } catch (e) {
+        // If contract doesn't expose getSharePrice, log and treat as 0
+        console.warn(`getSharePrice() missing for ${address} on ${chain}, using 0: ${e.message || e}`);
+        sharePrice = 0;
+      }
+
+      const supplyHuman = Number(formatUnits(totalSupply.output, decimals));
+      const tvlForAddress = supplyHuman * sharePrice;
+      totalTvl += tvlForAddress;
+    }
+
+    return {
+      usd: totalTvl,
+    };
+  };
+}
+
+const adapter = {
+  methodology:
+    'TVL is calculated by summing total supply of shares distributed to depositors and multiplied by their share price (comprehensive of profit and loss). Aggregated across configured contracts.',
+};
+
+for (const chain of Object.keys(contractsByChain)) {
+  adapter[chain] = { tvl: getChainTvlFunction(chain) };
+}
+
+module.exports = adapter;