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vault.token-helper.ts
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vault.token-helper.ts
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import { isPromise } from 'util/types';
import { Inject, Injectable } from '@nestjs/common';
import { compact } from 'lodash';
import { APP_TOOLKIT, IAppToolkit } from '~app-toolkit/app-toolkit.interface';
import {
buildDollarDisplayItem,
buildNumberDisplayItem,
buildPercentageDisplayItem,
} from '~app-toolkit/helpers/presentation/display-item.present';
import { getImagesFromToken } from '~app-toolkit/helpers/presentation/image.present';
import { EthersMulticall } from '~multicall';
import { ContractType } from '~position/contract.interface';
import { StatsItem } from '~position/display.interface';
import { AppTokenPosition, ExchangeableAppTokenDataProps, Token } from '~position/position.interface';
import { AppGroupsDefinition } from '~position/position.service';
import { Network } from '~types/network.interface';
export type VaultTokenDataProps = ExchangeableAppTokenDataProps & {
liquidity: number;
reserve: number;
};
export type VaultTokenHelperParams<T> = {
network: Network;
appId: string;
groupId: string;
dependencies?: AppGroupsDefinition[];
exchangeable?: boolean;
resolveContract: (opts: { address: string; network: Network }) => T;
resolveVaultAddresses: (opts: { multicall: EthersMulticall; network: Network }) => string[] | Promise<string[]>;
resolveUnderlyingTokenAddress: (opts: { multicall: EthersMulticall; contract: T }) => string | Promise<string | null>;
resolveReserve: (opts: {
address: string;
contract: T;
multicall: EthersMulticall;
underlyingToken: Token;
network: Network;
}) => number | Promise<number>;
resolvePricePerShare: (opts: {
contract: T;
multicall: EthersMulticall;
underlyingToken: Token;
reserve: number;
supply: number;
}) => number | Promise<number>;
resolveApy?: (opts: { vaultAddress: string; multicall: EthersMulticall; contract: T }) => Promise<number>;
resolvePrimaryLabel?: (opts: { symbol: string; vaultAddress: string; underlyingToken: Token }) => string;
resolveImages?: (opts: { underlyingToken: Token }) => string[];
};
@Injectable()
export class VaultTokenHelper {
constructor(@Inject(APP_TOOLKIT) private readonly appToolkit: IAppToolkit) {}
async getTokens<T>({
network,
appId,
groupId,
dependencies = [],
exchangeable = false,
resolveVaultAddresses,
resolveContract,
resolveUnderlyingTokenAddress,
resolveReserve,
resolvePricePerShare,
resolveApy,
resolvePrimaryLabel = ({ symbol }) => symbol,
resolveImages = ({ underlyingToken }) => getImagesFromToken(underlyingToken),
}: VaultTokenHelperParams<T>) {
const multicall = this.appToolkit.getMulticall(network);
const baseTokens = await this.appToolkit.getBaseTokenPrices(network);
const appTokens = await this.appToolkit.getAppTokenPositions(...dependencies);
const allTokens = [...appTokens, ...baseTokens];
const vaultAddresses = await resolveVaultAddresses({ multicall, network });
const curvePoolTokens = await Promise.all(
vaultAddresses.map(async vaultAddress => {
const type = ContractType.APP_TOKEN;
const erc20Contract = this.appToolkit.globalContracts.erc20({ address: vaultAddress, network });
const contract = resolveContract({ address: vaultAddress, network });
const [symbol, decimals, supplyRaw] = await Promise.all([
multicall.wrap(erc20Contract).symbol(),
multicall.wrap(erc20Contract).decimals(),
multicall.wrap(erc20Contract).totalSupply(),
]);
// Find underlying token in dependencies
const underlyingTokenAddressRawMaybePromise = resolveUnderlyingTokenAddress({ multicall, contract });
const underlyingTokenAddressRaw = isPromise(underlyingTokenAddressRawMaybePromise)
? await underlyingTokenAddressRawMaybePromise.catch(() => null)
: underlyingTokenAddressRawMaybePromise;
if (!underlyingTokenAddressRaw) return null;
const underlyingTokenAddress = underlyingTokenAddressRaw.toLowerCase();
const underlyingToken = allTokens.find(p => p.address === underlyingTokenAddress);
if (!underlyingToken) return null;
// Data props
const supply = Number(supplyRaw) / 10 ** decimals;
const reserve = await resolveReserve({ address: vaultAddress, contract, multicall, underlyingToken, network });
const pricePerShare = await resolvePricePerShare({ multicall, contract, reserve, supply, underlyingToken });
const apy = resolveApy ? await resolveApy({ multicall, contract, vaultAddress }) : 0;
const price = underlyingToken.price * pricePerShare;
const tokens = [underlyingToken];
const liquidity = price * supply;
// Display props
const label = resolvePrimaryLabel({ vaultAddress, symbol, underlyingToken });
const secondaryLabel = buildDollarDisplayItem(price);
const tertiaryLabel = resolveApy ? `${(apy * 100).toFixed(3)}% APY` : '';
const images = resolveImages({ underlyingToken });
const statsItems: StatsItem[] = [{ label: 'Liquidity', value: buildDollarDisplayItem(liquidity) }];
if (reserve > 0) statsItems.push({ label: 'Reserve', value: buildNumberDisplayItem(reserve) });
if (resolveApy) statsItems.push({ label: 'APY', value: buildPercentageDisplayItem(apy) });
const vaultToken: AppTokenPosition<VaultTokenDataProps> = {
type,
address: vaultAddress,
network,
appId,
groupId,
symbol,
decimals,
supply,
price,
pricePerShare,
tokens,
dataProps: {
liquidity,
reserve,
exchangeable,
},
displayProps: {
label,
secondaryLabel,
tertiaryLabel,
images,
statsItems,
},
};
return vaultToken;
}),
);
return compact(curvePoolTokens).filter(v => v.price > 0 && v.supply > 0);
}
}