DeFiCh/scan

import {
  LoanVaultTokenAmount,
  CollateralToken,
} from "@defichain/whale-api-client/dist/api/loan";
import BigNumber from "bignumber.js";
import { getActivePrice } from "./ActivePrice";

export function useNextCollateralizationRatio(
  collateralAmounts: LoanVaultTokenAmount[],
  loanAmounts: LoanVaultTokenAmount[],
  collateralTokens: CollateralToken[]
): BigNumber {
  const collaterals = collateralAmounts?.map((collateral) => {
    const priceFactor =
      collateralTokens.find((token) => token.token.id === collateral.id)
        ?.factor ?? "1";
    return new BigNumber(collateral.amount).multipliedBy(
      getActivePrice(
        collateral.symbol,
        collateral.activePrice,
        priceFactor,
        "NEXT"
      )
    );
  });
  const loans = loanAmounts?.map((loan) => {
    return new BigNumber(loan.amount).multipliedBy(
      getActivePrice(loan.symbol, loan.activePrice, "1", "NEXT")
    );
  });

  if (
    collaterals === undefined ||
    loans === undefined ||
    collaterals?.length === 0 ||
    loans?.length === 0
  ) {
    return new BigNumber(-1);
  }
  return collaterals
    ?.reduce((prev, next) => prev.plus(next))
    .dividedBy(loans?.reduce((prev, next) => prev.plus(next)))
    .multipliedBy(100);
}