add usdc (#41)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@fuseio/earn-sdk",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "description": "",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/constants/index.ts

@@ -22,6 +22,7 @@ export const FUSD = '0xd0ce1b4A349C35e61Af02f5971e71ac502441E49'
 export const FUSD_V3 = '0xCE86a1cf3cFf48139598De6bf9B1dF2E0f79F86F'
 export const sFUSE = '0xb1DD0B683d9A56525cC096fbF5eec6E60FE79871'
 export const WFUSE = '0x0BE9e53fd7EDaC9F859882AfdDa116645287C629'
+export const USDC_V2 = '0x28C3d1cD466Ba22f6cae51b1a4692a831696391A'
 
 export const LIQUID_STAKING = '0xa3dc222eC847Aac61FB6910496295bF344Ea46be'
 

src/rewards/ChefRewardProgram.ts

@@ -4,7 +4,7 @@ import LIQUID_STAKING_ABI from '../constants/abi/LiquidStaking.json'
 import { calculateReserves, getChef, weiToNumber } from '../utils'
 import { ethCall, ethTransaction } from '../utils/eth'
 import { getChefPool, getChefUser } from '../graphql/fetcher'
-import { FUSD, FUSD_V3, LIQUID_STAKING, sFUSE, VOLT, WFUSE, xVOLT } from '../constants'
+import { FUSD, FUSD_V3, LIQUID_STAKING, sFUSE, USDC_V2, VOLT, WFUSE, xVOLT } from '../constants'
 import fetchVoltageTokenPrice from '../utils/fetchVoltageTokenPrice'
 import fetchTokenInfo from '../utils/fetchTokenInfo'
 import fetchChefPairInfo from '../utils/fetchChefPairInfo'
@@ -91,6 +91,13 @@ export default class ChefRewardProgram extends RewardProgram {
 
         reserves = [globalTotalStake, null]
 
+        pairPrice = 1
+      } else if (pairAddress.toLowerCase() === USDC_V2.toLowerCase()) {
+        const token0 = await fetchTokenInfo(USDC_V2, this.web3)
+        tokens = [{ id: USDC_V2, ...token0 }, null]
+
+        reserves = [globalTotalStake, null]
+
         pairPrice = 1
       } else if (pairAddress.toLowerCase() === FUSD_V3.toLowerCase()) {
         const token0 = await fetchTokenInfo(FUSD_V3, this.web3)