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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| const fetch = require('node-fetch'); | ||
|
|
||
| function isLeapYear(year) { | ||
| return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0; | ||
| } | ||
|
|
||
| async function getDistributions(endpoint = 'evaa.space') { | ||
| try { | ||
| let result = await fetch(`https://${endpoint}/query/distributions/list`, { | ||
| headers: { accept: 'application/json' }, | ||
| }); | ||
| let resData = await result.json(); | ||
| return resData; | ||
| } catch (error) { | ||
| console.error(error); | ||
| return undefined; | ||
| } | ||
| } | ||
| const isLeap = isLeapYear(new Date().getFullYear()); | ||
| const totalSecsInYear = (isLeap ? 366 : 365) * 24 * 60 * 60; | ||
|
|
||
| function calcApy( | ||
| rewardAmount, | ||
| totalAmount, | ||
| rewardingAssetPrice, | ||
| rewardsAssetPrice, | ||
| rewardingScaleFactor, | ||
| rewardsScaleFactor, | ||
| totalSecsInCurrentSeason | ||
| ) { | ||
| const rate = rewardingScaleFactor / Number(totalAmount); | ||
| const rewardForUnit = | ||
| rate * | ||
| (((Number(rewardAmount) / rewardsScaleFactor) * (rewardsAssetPrice ?? 0)) / | ||
| (rewardingAssetPrice || 1)) * | ||
| rewardingScaleFactor; | ||
|
|
||
| return ( | ||
| ((rewardForUnit * totalSecsInYear) / | ||
| (totalSecsInCurrentSeason * rewardingScaleFactor)) * | ||
| 100 | ||
| ); | ||
| } | ||
|
|
||
| function calculateRewardApy(distributionsResp, pool, data, prices) { | ||
| try { | ||
| if ( | ||
| !distributionsResp?.distributions || | ||
| distributionsResp.distributions.length === 0 | ||
| ) { | ||
| console.log('Invalid distributions data:', distributionsResp); | ||
| return []; | ||
| } | ||
|
|
||
| const currentCampaign = distributionsResp?.distributions.find( | ||
| (campaign) => campaign.started && !campaign.expired | ||
| ); | ||
|
|
||
| if (!currentCampaign) { | ||
| return []; | ||
| } | ||
|
|
||
| const seasonsApy = currentCampaign.seasons | ||
| ?.filter((season) => season.started && !season.expired) | ||
| ?.filter((season) => season.pool === pool) | ||
| ?.map((season) => { | ||
| const rewardingAssetId = BigInt(season?.rewarding_asset_id ?? 0); | ||
| const rewardsAssetId = BigInt(season?.rewards_asset_id ?? 0); | ||
|
|
||
| const rewardingAssetData = data.assetsData.get(rewardingAssetId); | ||
| const rewardsAssetData = data.assetsData.get(rewardsAssetId); | ||
|
|
||
| if (!rewardingAssetData || !rewardsAssetData) { | ||
| return undefined; | ||
| } | ||
|
|
||
| const rewardType = | ||
| season?.reward_type?.toLowerCase() === 'borrow' ? 'Borrow' : 'Supply'; | ||
|
|
||
| let rewardAmount = Number(season?.rewards_amount) || 0; | ||
|
|
||
| if (rewardType === 'Borrow' && season?.borrow_budget) { | ||
| rewardAmount = season.borrow_budget; | ||
| } else if (rewardType === 'Supply' && season?.supply_budget) { | ||
| rewardAmount = season.supply_budget; | ||
| } | ||
|
|
||
| const totalAmountSupply = | ||
| rewardingAssetData.totalSupply?.original ?? | ||
| rewardingAssetData.totalSupply; | ||
| const totalAmountBorrow = | ||
| rewardingAssetData.totalBorrow?.original ?? | ||
| rewardingAssetData.totalBorrow; | ||
|
|
||
| const totalAmount = | ||
| rewardType === 'Borrow' ? totalAmountBorrow : totalAmountSupply; | ||
|
|
||
| if (!totalAmount || totalAmount === '0') { | ||
| return []; | ||
| } | ||
|
|
||
| const rewardingAssetConfig = data.assetsConfig.get(rewardingAssetId); | ||
| const rewardsAssetConfig = data.assetsConfig.get(rewardsAssetId); | ||
|
|
||
| const rewardingScaleFactor = | ||
| 10 ** Number(rewardingAssetConfig?.decimals ?? 0); | ||
| const rewardsScaleFactor = | ||
| 10 ** Number(rewardsAssetConfig?.decimals ?? 0); | ||
|
|
||
| const rewardingPriceData = prices.dict.get(rewardingAssetId); | ||
| const rewardsPriceData = prices.dict.get(rewardsAssetId); | ||
|
|
||
| const rewardingAssetPrice = Number(rewardingPriceData); | ||
| const rewardsAssetPrice = Number(rewardsPriceData); | ||
|
|
||
| const seasonStart = new Date(season?.campaign_start ?? 0); | ||
| const seasonEnd = new Date(season?.campaign_end ?? 0); | ||
| const totalSecsInCurrentSeason = (seasonEnd - seasonStart) / 1000; | ||
|
|
||
| if (totalSecsInCurrentSeason <= 0) { | ||
| return undefined; | ||
| } | ||
|
|
||
| const baseApy = calcApy( | ||
| rewardAmount, | ||
| totalAmount, | ||
| rewardingAssetPrice, | ||
| rewardsAssetPrice, | ||
| rewardingScaleFactor, | ||
| rewardsScaleFactor, | ||
| totalSecsInCurrentSeason | ||
| ); | ||
|
|
||
| const result = [ | ||
| { | ||
| apy: baseApy, | ||
| rewardType, | ||
| rewardingAssetId, | ||
| rewardsAssetId, | ||
| }, | ||
| ]; | ||
|
|
||
| if ( | ||
| rewardType === 'Borrow' && | ||
| season?.supply_budget && | ||
| season.supply_budget > 0 | ||
| ) { | ||
| const supplyApy = calcApy( | ||
| season.supply_budget, | ||
| totalAmountSupply, | ||
| rewardingAssetPrice, | ||
| rewardsAssetPrice, | ||
| rewardingScaleFactor, | ||
| rewardsScaleFactor, | ||
| totalSecsInCurrentSeason | ||
| ); | ||
| result.push({ | ||
| apy: supplyApy, | ||
| rewardType: 'Supply', | ||
| rewardingAssetId, | ||
| rewardsAssetId, | ||
| }); | ||
| } | ||
|
|
||
| return result; | ||
| }); | ||
| return seasonsApy.flat(); | ||
| } catch (error) { | ||
| console.error(error); | ||
| return undefined; | ||
| } | ||
| } | ||
|
|
||
| module.exports = { | ||
| getDistributions, | ||
| calculateRewardApy, | ||
| }; |