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Use
previewPoints on contract to compute APY (#390)
* Use `previewPoints` on contract to compute APY * Fix veOGV Amount
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| import { useEffect, useMemo, useState } from "react"; | ||
| import { SECONDS_IN_A_MONTH } from "constants/index"; | ||
| import { useStore } from "utils/store"; | ||
| import { getRewardsApy } from "./apy"; | ||
| import { ethers } from "ethers"; | ||
|
|
||
| const useStakingAPY = (amountStaked, duration) => { | ||
| const { contracts, totalBalances } = useStore(); | ||
|
|
||
| const [loading, setLoading] = useState(true); | ||
| const [veOgvReceived, setVeOGVReceived] = useState(0); | ||
|
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| const { totalSupplyVeOgvAdjusted } = totalBalances; | ||
|
|
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| useEffect(() => { | ||
| if (!contracts.loaded) return; | ||
|
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| let done = false; | ||
|
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| async function go() { | ||
| try { | ||
| const [val] = await contracts.OgvStaking.previewPoints( | ||
| ethers.utils.parseEther(amountStaked.toString()), | ||
| duration * SECONDS_IN_A_MONTH | ||
| ); | ||
|
|
||
| if (!done) { | ||
| setVeOGVReceived(parseFloat(ethers.utils.formatEther(val))); | ||
| setLoading(false); | ||
| } | ||
| } catch (err) { | ||
| console.error("Failed to fetch APY", err); | ||
| } | ||
| } | ||
|
|
||
| go(); | ||
|
|
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| return () => { | ||
| done = true; | ||
| }; | ||
| }, [amountStaked, duration, contracts.loaded]); | ||
|
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||
| const stakingAPY = useMemo(() => { | ||
| if (!veOgvReceived || !totalSupplyVeOgvAdjusted || !amountStaked) { | ||
| return 0; | ||
| } | ||
|
|
||
| return getRewardsApy(veOgvReceived, amountStaked, totalSupplyVeOgvAdjusted); | ||
| }, [veOgvReceived, amountStaked, totalSupplyVeOgvAdjusted]); | ||
|
|
||
| return { | ||
| loading, | ||
| veOgvReceived, | ||
| stakingAPY, | ||
| }; | ||
| }; | ||
|
|
||
| export default useStakingAPY; |