makeAtomicSwap method in bridge

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.19.57",
+  "version": "0.19.58",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",

src/Orion/bridge/index.ts

@@ -1,4 +1,4 @@
-import type { ethers } from 'ethers';
+import { ethers } from 'ethers';
 import {
   type AtomicSwap, type SupportedChainId,
   type Unit, INTERNAL_PROTOCOL_PRECISION
@@ -7,7 +7,10 @@ import getHistoryExt from './getHistory.js';
 import swapExt from './swap.js';
 
 import { BigNumber } from 'bignumber.js';
+import generateSecret from '../../utils/generateSecret.js';
 
+export const SECONDS_IN_DAY = 60 * 60 * 24;
+export const EXPIRATION_DAYS = 4;
 export default class Bridge {
   constructor(
     private readonly unitsArray: Unit[],
@@ -71,6 +74,32 @@ export default class Bridge {
     });
   }
 
+  makeAtomicSwap = (
+    walletAddress: string,
+    networkFrom: SupportedChainId,
+    networkTo: SupportedChainId,
+    amount: string,
+    asset: string,
+    env?: string | undefined,
+  ) => {
+    const secret = generateSecret();
+    const secretHash = ethers.utils.keccak256(secret);
+    const lockExpiration = Date.now() + SECONDS_IN_DAY * EXPIRATION_DAYS * 1000;
+
+    return {
+      sourceChainId: networkFrom,
+      targetChainId: networkTo,
+      amount,
+      walletAddress,
+      secret,
+      secretHash,
+      assetName: asset,
+      creationDate: Date.now(),
+      lockExpiration,
+      env,
+    };
+  }
+
   getHistory(address: string, limit = 1000) {
     return getHistoryExt(this.unitsArray, address, limit);
   }