Added getSwapInfo

src/OrionUnit/Exchange/getSwapInfo.ts

@@ -0,0 +1,138 @@
+import BigNumber from 'bignumber.js';
+import { ethers } from 'ethers';
+import { utils } from '../..';
+import { NATIVE_CURRENCY_PRECISION, SWAP_THROUGH_ORION_POOL_GAS_LIMIT } from '../../constants';
+import { OrionAggregator } from '../../services/OrionAggregator';
+import { OrionBlockchain } from '../../services/OrionBlockchain';
+
+import simpleFetch from '../../simpleFetch';
+import getNativeCryptocurrency from '../../utils/getNativeCryptocurrency';
+
+export type GetSwapInfoParams = {
+  type: 'exactSpend' | 'exactReceive',
+  assetIn: string,
+  assetOut: string,
+  amount: BigNumber.Value,
+  feeAsset: string,
+  orionBlockchain: OrionBlockchain,
+  orionAggregator: OrionAggregator
+  options?: {
+    instantSettlement?: boolean,
+    poolOnly?: boolean,
+  }
+}
+
+export default async function getSwapInfo({
+  type,
+  assetIn,
+  assetOut,
+  amount,
+  feeAsset,
+  orionBlockchain,
+  orionAggregator,
+  options,
+}: GetSwapInfoParams) {
+  if (amount === '') throw new Error('Amount can not be empty');
+  if (assetIn === '') throw new Error('AssetIn can not be empty');
+  if (assetOut === '') throw new Error('AssetOut can not be empty');
+  if (feeAsset === '') throw new Error('Fee asset can not be empty');
+
+  const amountBN = new BigNumber(amount);
+  if (amountBN.isNaN()) throw new Error(`Amount '${amount.toString()}' is not a number`);
+  if (amountBN.lte(0)) throw new Error(`Amount '${amount.toString()}' should be greater than 0`);
+
+  const {
+    assetToAddress,
+  } = await simpleFetch(orionBlockchain.getInfo)();
+  const nativeCryptocurrency = getNativeCryptocurrency(assetToAddress);
+
+  const feeAssets = await simpleFetch(orionBlockchain.getTokensFee)();
+  const pricesInOrn = await simpleFetch(orionBlockchain.getPrices)();
+  const gasPriceWei = await simpleFetch(orionBlockchain.getGasPriceWei)();
+
+  const gasPriceGwei = ethers.utils.formatUnits(gasPriceWei, 'gwei').toString();
+
+  const assetInAddress = assetToAddress[assetIn];
+  if (!assetInAddress) throw new Error(`Asset '${assetIn}' not found`);
+  const feeAssetAddress = assetToAddress[feeAsset];
+  if (!feeAssetAddress) throw new Error(`Fee asset '${feeAsset}' not found. Available assets: ${Object.keys(feeAssets).join(', ')}`);
+
+  const swapInfo = await simpleFetch(orionAggregator.getSwapInfo)(
+    type,
+    assetIn,
+    assetOut,
+    amount.toString(),
+    options?.instantSettlement,
+    options?.poolOnly ? 'pools' : undefined,
+  );
+
+  if (swapInfo.orderInfo !== null && options?.poolOnly === true && options.poolOnly !== swapInfo.isThroughPoolOptimal) {
+    throw new Error(`Unexpected Orion Aggregator response. Please, contact support. Report swap request id: ${swapInfo.id}`);
+  }
+
+  // if (swapInfo.type === 'exactReceive' && amountBN.lt(swapInfo.minAmountOut)) {
+  //   throw new Error(`Amount is too low. Min amountOut is ${swapInfo.minAmountOut} ${assetOut}`);
+  // }
+
+  // if (swapInfo.type === 'exactSpend' && amountBN.lt(swapInfo.minAmountIn)) {
+  //   throw new Error(`Amount is too low. Min amountIn is ${swapInfo.minAmountIn} ${assetIn}`);
+  // }
+
+  // if (swapInfo.orderInfo === null) throw new Error(swapInfo.executionInfo);
+
+  let isThroughPoolOptimal: boolean;
+  if (options?.poolOnly) isThroughPoolOptimal = true;
+  else isThroughPoolOptimal = swapInfo.isThroughPoolOptimal;
+
+  if (isThroughPoolOptimal) {
+    const transactionCost = ethers.BigNumber.from(SWAP_THROUGH_ORION_POOL_GAS_LIMIT).mul(gasPriceWei);
+    const denormalizedTransactionCost = utils.denormalizeNumber(transactionCost, NATIVE_CURRENCY_PRECISION);
+
+    return {
+      swapInfo,
+      fee: {
+        assetName: nativeCryptocurrency,
+        assetAddress: ethers.constants.AddressZero,
+        amount: denormalizedTransactionCost.toString(),
+      },
+    };
+  }
+
+  let feeAmount: string | undefined;
+
+  if (swapInfo.orderInfo) {
+    const [baseAssetName] = swapInfo.orderInfo.assetPair.split('-');
+    if (baseAssetName === undefined) throw new Error('Base asset name is undefined');
+    const baseAssetAddress = assetToAddress[baseAssetName];
+    if (!baseAssetAddress) throw new Error(`No asset address for ${baseAssetName}`);
+
+    // Fee calculation
+    const baseAssetPriceInOrn = pricesInOrn?.[baseAssetAddress];
+    if (!baseAssetPriceInOrn) throw new Error(`Base asset price ${baseAssetName} in ORN not found`);
+    const baseCurrencyPriceInOrn = pricesInOrn[ethers.constants.AddressZero];
+    if (!baseCurrencyPriceInOrn) throw new Error('Base currency price in ORN not found');
+    const feeAssetPriceInOrn = pricesInOrn[feeAssetAddress];
+    if (!feeAssetPriceInOrn) throw new Error(`Fee asset price ${feeAsset} in ORN not found`);
+    const feePercent = feeAssets?.[feeAsset];
+    if (!feePercent) throw new Error(`Fee asset ${feeAsset} not available`);
+
+    const { totalFeeInFeeAsset } = utils.calculateFeeInFeeAsset(
+      swapInfo.orderInfo.amount,
+      feeAssetPriceInOrn,
+      baseAssetPriceInOrn,
+      baseCurrencyPriceInOrn,
+      gasPriceGwei,
+      feePercent,
+    );
+    feeAmount = totalFeeInFeeAsset;
+  }
+
+  return {
+    swapInfo,
+    fee: {
+      assetName: feeAsset,
+      assetAddress: feeAssetAddress,
+      amount: feeAmount,
+    },
+  };
+}

src/OrionUnit/Exchange/index.ts

@@ -1,13 +1,13 @@
 import OrionUnit from '..';
 import deposit, { DepositParams } from './deposit';
-import getSwapMarketFeeInfo, { GetSwapMarketInfoParams } from './getSwapMarketFeeInfo';
+import getSwapInfo, { GetSwapInfoParams } from './getSwapInfo';
 import swapMarket, { SwapMarketParams } from './swapMarket';
 import withdraw, { WithdrawParams } from './withdraw';
 
 type PureSwapMarketParams= Omit<SwapMarketParams, 'orionUnit'>
 type PureDepositParams = Omit<DepositParams, 'orionUnit'>
 type PureWithdrawParams = Omit<WithdrawParams, 'orionUnit'>
-type PureGetSwapMarketInfoParams= Omit<GetSwapMarketInfoParams, 'orionBlockchain' | 'orionAggregator'>
+type PureGetSwapMarketInfoParams= Omit<GetSwapInfoParams, 'orionBlockchain' | 'orionAggregator'>
 
 export default class Exchange {
   private readonly orionUnit: OrionUnit;
@@ -23,8 +23,8 @@ export default class Exchange {
     });
   }
 
-  public getSwapMarketFeeInfo(params: PureGetSwapMarketInfoParams) {
-    return getSwapMarketFeeInfo({
+  public getSwapInfo(params: PureGetSwapMarketInfoParams) {
+    return getSwapInfo({
       orionAggregator: this.orionUnit.orionAggregator,
       orionBlockchain: this.orionUnit.orionBlockchain,
       ...params,