Created
October 19, 2021 08:36
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AAVE APR
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| import { fetchMultiReserveInfo, DECIMAL, RAY, YEAR_TO_SECONDS, toBN } from "./subgraph" | |
| const main = async () => { | |
| const ids = [ | |
| "0x6b175474e89094c44da98b954eedeac495271d0f0xb53c1a33016b2dc2ff3653530bff1848a515c8c5", | |
| "0x7fc66500c84a76ad7e9c93437bfc5ac33e2ddae90xb53c1a33016b2dc2ff3653530bff1848a515c8c5" | |
| ] | |
| const rewardToken = "0x7fc66500c84a76ad7e9c93437bfc5ac33e2ddae9" | |
| const { reserves } = (await fetchMultiReserveInfo(ids)) | |
| const reward = reserves.filter((r: Record<string, any>) => r.underlyingAsset === rewardToken)[0] | |
| return reserves.filter((r: Record<string, any>) => r.underlyingAsset !== rewardToken) | |
| .map((r: Record<string, any>) => { | |
| let totalVariableDebt = toBN(r.variableBorrowIndex).multipliedBy(toBN(r.totalScaledVariableDebt)).dividedBy(DECIMAL).dividedBy(RAY) | |
| let totalStableDebt = toBN(r.totalPrincipalStableDebt).dividedBy(DECIMAL) | |
| let availableLiquidity = toBN(r.availableLiquidity).dividedBy(DECIMAL) | |
| let totalLiquidity = totalVariableDebt.plus(totalStableDebt).plus(availableLiquidity) | |
| let rewardPrice = toBN(reward.price.priceInEth) | |
| let tokenPrice = toBN(r.price.priceInEth) | |
| let emissionRewards = toBN(r.aEmissionPerSecond).multipliedBy(YEAR_TO_SECONDS).multipliedBy(rewardPrice).dividedBy(DECIMAL) | |
| let total = totalLiquidity.multipliedBy(tokenPrice) | |
| return emissionRewards.dividedBy(total).toString() | |
| }) | |
| } | |
| main() | |
| .then(console.log) | |
| .catch(console.error) |
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| { | |
| "name": "aaveapr", | |
| "version": "1.0.0", | |
| "description": "only for test", | |
| "main": "aave.ts", | |
| "keywords": [], | |
| "author": "", | |
| "license": "", | |
| "dependencies": { | |
| "@typescript-eslint/eslint-plugin": "^5.1.0", | |
| "@typescript-eslint/parser": "^5.1.0", | |
| "abort-controller": "^3.0.0", | |
| "bignumber.js": "^9.0.1", | |
| "graphql": "^15.6.1", | |
| "graphql-request": "^3.6.1", | |
| "typescript": "^4.4.4" | |
| } | |
| } |
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| import { GraphQLClient, gql } from 'graphql-request' | |
| import BN from 'bignumber.js' | |
| import AbortController from 'abort-controller' | |
| const AAVE_THE_GRAPH = 'https://api.thegraph.com/subgraphs/name/aave/protocol-v2' | |
| export const DECIMAL = new BN(10 ** 18) | |
| export const RAY = new BN(10 ** 27) | |
| export const YEAR_TO_SECONDS = new BN(31536000) | |
| const timeout = 2 * 60 * 1000 | |
| const request = async (url: string, query: any, variables: any = {}) => { | |
| const controller = new AbortController(); | |
| const timeoutId = setTimeout(() => { | |
| controller.abort() | |
| }, timeout) | |
| const client = new GraphQLClient(url, { | |
| signal: controller.signal | |
| }) | |
| try { | |
| const resp = await client.request(query, variables) | |
| clearTimeout(timeoutId) | |
| return resp | |
| } catch (err) { | |
| clearTimeout(timeoutId) | |
| throw err | |
| } | |
| } | |
| export const fetchMultiReserveInfo = async (reserveIds: string[]) => { | |
| const query = gql` | |
| query QueryMultiReserveInfo( | |
| $reserveIds: [ID!] | |
| ) { | |
| reserves( | |
| where: { | |
| id_in: $reserveIds | |
| } | |
| ) { | |
| id | |
| aEmissionPerSecond | |
| underlyingAsset | |
| price { | |
| priceInEth | |
| } | |
| underlyingAsset | |
| totalScaledVariableDebt | |
| totalPrincipalStableDebt | |
| variableBorrowIndex | |
| stableBorrowRate | |
| availableLiquidity | |
| lastUpdateTimestamp | |
| } | |
| } | |
| ` | |
| const resp = await request(AAVE_THE_GRAPH, query, { | |
| reserveIds: reserveIds.map(reserveId => reserveId.toLowerCase()) | |
| }) | |
| return { | |
| reserves: resp.reserves | |
| } | |
| } | |
| export const toBN = (n: any): BN => { | |
| return new BN(n) | |
| } |
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| { | |
| "compilerOptions": { | |
| "baseUrl": "./", | |
| "outDir": "dist", | |
| "strictNullChecks": true, | |
| "noImplicitAny": true, | |
| "noImplicitThis": true, | |
| "resolveJsonModule": true, | |
| "declaration": true, | |
| "declarationDir": "lib", | |
| "experimentalDecorators": true, | |
| "allowSyntheticDefaultImports": true, | |
| "forceConsistentCasingInFileNames": true, | |
| "esModuleInterop": true, | |
| "moduleResolution": "node", | |
| "pretty": true, | |
| "lib": ["ESNext", "DOM"] | |
| }, | |
| "exclude": ["node_modules"] | |
| } |
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