From 832921d6d3ce9a2c6edbd23ebbd8d7586116625e Mon Sep 17 00:00:00 2001
From: Asilbek <azizjonogliasilbek@gmail.com>
Date: Mon, 6 Oct 2025 10:20:14 +0500
Subject: [PATCH] feat: add ZeroBase CeDefi adapter with yield calculation and
 multi-chain support for fee adapter

---
 fees/ZEROBASE-CeDefi/index.ts | 153 ++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 fees/ZEROBASE-CeDefi/index.ts

diff --git a/fees/ZEROBASE-CeDefi/index.ts b/fees/ZEROBASE-CeDefi/index.ts
new file mode 100644
index 0000000000..f3d046f937
--- /dev/null
+++ b/fees/ZEROBASE-CeDefi/index.ts
@@ -0,0 +1,153 @@
+import { FetchOptions, SimpleAdapter } from "../../adapters/types";
+import { CHAIN } from "../../helpers/chains";
+import BigNumber from "bignumber.js";
+
+const CONFIG = {
+  [CHAIN.ETHEREUM]: {
+    vault: '0x9eF52D8953d184840F2c69096B7b3A7dA7093685',
+    tokens: [
+      '0xdac17f958d2ee523a2206206994597c13d831ec7', // USDT
+      '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48'  // USDC
+    ]
+  },
+  [CHAIN.BSC]: {
+    vault: '0xCc5Df5C68d8c991035B6A437D4e00A99875228E4',
+    tokens: [
+      '0x55d398326f99059ff775485246999027b3197955', // USDT
+      '0x8ac76a51cc950d9822d68b83fe1ad97b32cd580d'  // USDC
+    ]
+  },
+  [CHAIN.POLYGON]: {
+    vault: '0xCc5Df5C68d8c991035B6A437D4e00A99875228E4',
+    tokens: [
+      '0xc2132d05d31c914a87c6611c10748aeb04b58e8f', // USDT
+      '0x3c499c542cef5e3811e1192ce70d8cc03d5c3359'  // USDC
+    ]
+  },
+  [CHAIN.ARBITRUM]: {
+    vault: '0xCc5Df5C68d8c991035B6A437D4e00A99875228E4',
+    tokens: [
+      '0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9', // USDT
+      '0xaf88d065e77c8cc2239327c5edb3a432268e5831'  // USDC
+    ]
+  },
+  [CHAIN.OPTIMISM]: {
+    vault: '0xCc5Df5C68d8c991035B6A437D4e00A99875228E4',
+    tokens: [
+      '0x94b008aa00579c1307b0ef2c499ad98a8ce58e58', // USDT
+      '0x0b2c639c533813f4aa9d7837caf62653d097ff85'  // USDC
+    ]
+  },
+  [CHAIN.AVAX]: {
+    vault: '0xC3e9006559cB209a987e99257986aA5Ce324F829',
+    tokens: [
+      '0x9702230a8ea53601f5cd2dc00fdbc13d4df4a8c7', // USDt
+      '0xb97ef9ef8734c71904d8002f8b6bc66dd9c48a6e'  // USDC
+    ]
+  },
+  [CHAIN.BASE]: {
+    vault: '0xCc5Df5C68d8c991035B6A437D4e00A99875228E4',
+    tokens: [
+      '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913'  // USDC
+    ]
+  }
+}
+
+const abis = {
+  getTVL: "function getTVL(address _token) view returns (uint256)"
+}
+
+// APY rates - update these as needed
+const USDT_APY = 0.09;      // 9.00% - user yield
+const ZBT_APY = 0.0873;     // 8.73% - protocol revenue  
+const TOTAL_APY = USDT_APY + ZBT_APY; // 17.73% - total yield generated
+
+const fetch = async (options: FetchOptions) => {
+  const config = CONFIG[options.chain];
+  if (!config) {
+    throw new Error(`Chain ${options.chain} not supported`);
+  }
+
+  const { vault, tokens } = config;
+  
+  const dailyFees = options.createBalances();
+  const dailyRevenue = options.createBalances();
+  const dailySupplySideRevenue = options.createBalances();
+  
+  // Get TVL for each token
+  const tvlBalances = await options.api.multiCall({ 
+    abi: abis.getTVL, 
+    calls: tokens.map((t) => ({ target: vault, params: [t]})) 
+  });
+  
+  // Calculate number of days in the period
+  const secondsInPeriod = options.endTimestamp - options.startTimestamp;
+  const daysInPeriod = secondsInPeriod / 86400;
+  
+  // Calculate yields for each token
+  tokens.forEach((token, i) => {
+    const tvl = new BigNumber(tvlBalances[i].toString());
+    
+    // Total yield generated from basis trading (17.73% APY)
+    const totalYield = tvl.multipliedBy(TOTAL_APY).multipliedBy(daysInPeriod).dividedBy(365);
+    
+    // User yield in USDT/USDC (9.00% APY)
+    const userYield = tvl.multipliedBy(USDT_APY).multipliedBy(daysInPeriod).dividedBy(365);
+    
+    // Protocol revenue (8.73% APY)
+    const protocolYield = tvl.multipliedBy(ZBT_APY).multipliedBy(daysInPeriod).dividedBy(365);
+    
+    dailyFees.add(token, totalYield.toFixed(0));
+    dailySupplySideRevenue.add(token, userYield.toFixed(0));
+    dailyRevenue.add(token, protocolYield.toFixed(0));
+  });
+  
+  return {
+    dailyFees,
+    dailyRevenue,
+    dailyProtocolRevenue: dailyRevenue,
+    dailySupplySideRevenue
+  };
+};
+
+const adapter: SimpleAdapter = {
+  version: 2,
+  adapter: {
+    [CHAIN.ETHEREUM]: {
+      fetch,
+      start: '2025-07-01',
+    },
+    [CHAIN.BSC]: {
+      fetch,
+      start: '2025-07-01',
+    },
+    [CHAIN.POLYGON]: {
+      fetch,
+      start: '2025-07-01',
+    },
+    [CHAIN.ARBITRUM]: {
+      fetch,
+      start: '2025-07-01',
+    },
+    [CHAIN.OPTIMISM]: {
+      fetch,
+      start: '2025-07-01',
+    },
+    [CHAIN.AVAX]: {
+      fetch,
+      start: '2025-07-01',
+    },
+    [CHAIN.BASE]: {
+      fetch,
+      start: '2025-07-01',
+    },
+  },
+  methodology: {
+    Fees: 'Total yield generated from delta-neutral basis trading on centralized exchanges (17.73% APY across all staked assets)',
+    Revenue: 'Protocol retains 8.73% APY of trading yield as protocol revenue, which is converted and distributed to stakers in ZBT tokens',
+    ProtocolRevenue: 'The 8.73% APY portion is used for ZBT token emissions to incentivize stakers',
+    SupplySideRevenue: 'Stakers receive 9.00% APY in USDT/USDC (51% of trading yield) plus 8.73% APY in ZBT token rewards (49% of trading yield)'
+  }
+};
+
+export default adapter;
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