Add TEMP staking yields (#1040)

src/adaptors/tempus-finance/abis/TempStaking.json

@@ -0,0 +1,43 @@
+{
+  "totalStakedSupply": {
+    "inputs": [],
+    "name": "totalStakedSupply",
+    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  "rewardPrograms": {
+    "inputs": [
+      { "internalType": "contract IERC20", "name": "", "type": "address" }
+    ],
+    "name": "rewardPrograms",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "rewardPerSecond",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "lastRewardPerTokenCached",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "lastUpdateTime",
+        "type": "uint256"
+      },
+      { "internalType": "uint256", "name": "startTime", "type": "uint256" },
+      { "internalType": "uint256", "name": "finishTime", "type": "uint256" }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  "timeMultiplierIncreasePerSec": {
+    "inputs": [],
+    "name": "timeMultiplierIncreasePerSec",
+    "outputs": [{ "internalType": "uint256", "name": "", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  }
+}

src/adaptors/tempus-finance/index.js

@@ -0,0 +1,105 @@
+const { default: BigNumber } = require('bignumber.js');
+const axios = require('axios');
+const sdk = require('@defillama/sdk4');
+const tempStaking = require('./abis/TempStaking.json');
+
+const STAKING = '0x6C6D4753a1107585121599746c2E398cCbEa5119';
+const TEMP = '0xA36FDBBAE3c9d55a1d67EE5821d53B50B63A1aB9';
+const RAFT = '0x4C5Cb5D87709387f8821709f7a6664f00DcF0C93';
+
+async function getEstimatedApy(
+  rewardPerSecond,
+  timeMultiplierIncreasePerSec,
+  stakeAmount,
+  totalTempStaked,
+  tempPrice,
+  raftPrice,
+  stakeStart,
+  stakeEnd
+) {
+  // rewards = (stakeAmount / (stakeAmount + totalTempStaked)) * rewardsPerSecond * (stakeEnd - stakeStart) * (1 + timeMultiplierIncreasePerSec * (stakeEnd - stakeStart));
+  const rewards = stakeAmount
+    .times(1e18)
+    .div(stakeAmount.plus(totalTempStaked))
+    .times(rewardPerSecond)
+    .div(1e18)
+    .times(stakeEnd - stakeStart)
+    .times(
+      BigNumber(1).plus(
+        timeMultiplierIncreasePerSec.times(stakeEnd - stakeStart).div(1e18)
+      )
+    );
+
+  // apr = rewards * (raftPrice / tempPrice) * (SECONDS_IN_A_YEAR / stakeEnd) / stakeAmount;
+  return rewards
+    .times(raftPrice / tempPrice)
+    .times((60 * 60 * 24 * 365) / stakeEnd)
+    .div(stakeAmount);
+}
+
+async function getTokenPrice(token) {
+  const networkTokenPair = `ethereum:${token}`;
+  return (
+    await axios.get(`https://coins.llama.fi/prices/current/${networkTokenPair}`)
+  ).data.coins[networkTokenPair].price;
+}
+
+async function apy() {
+  const totalStaked = BigNumber(
+    (
+      await sdk.api.abi.call({
+        target: STAKING,
+        abi: tempStaking.totalStakedSupply,
+      })
+    ).output
+  );
+  const rewardPerSecond = BigNumber(
+    (
+      await sdk.api.abi.call({
+        target: STAKING,
+        abi: tempStaking.rewardPrograms,
+        params: [RAFT],
+      })
+    ).output.rewardPerSecond
+  );
+  const timeMultiplierIncreasePerSec = BigNumber(
+    (
+      await sdk.api.abi.call({
+        target: STAKING,
+        abi: tempStaking.timeMultiplierIncreasePerSec,
+      })
+    ).output
+  );
+  const tempPrice = await getTokenPrice(TEMP);
+  const raftPrice = await getTokenPrice(RAFT);
+
+  const apy = await getEstimatedApy(
+    rewardPerSecond,
+    timeMultiplierIncreasePerSec,
+    BigNumber(1),
+    totalStaked,
+    tempPrice,
+    raftPrice,
+    0,
+    1
+  );
+  const totalStakedUsd = totalStaked.times(tempPrice).div(1e18).toNumber();
+
+  return [
+    {
+      pool: `${STAKING}-${RAFT}`.toLowerCase(),
+      project: 'tempus-finance',
+      symbol: 'TEMP',
+      chain: 'Ethereum',
+      poolMeta: 'TEMP Staking',
+      apyReward: apy.toNumber() * 100,
+      rewardTokens: [RAFT],
+      tvlUsd: totalStakedUsd,
+    },
+  ];
+}
+
+module.exports = {
+  apy,
+  url: 'https://stake.tempus.finance/',
+};