Update browser wallet for Whirlpools SDK (#182)

# Pull Request Description

## Related Issue
Fixes # (issue number)

## Changes Made
This PR adds the following changes:
- Created a custom Wallet class to support browser use of Orca tools


## Transaction executed by agent 
Example transaction:
https://solscan.io/tx/GNmgxM4ZRHURDWcgmhLmBrSG5RgF9yw5B4jzEXzWX2jpNvCbUsQyaMdkkH77au7pisJ89hJdrcs8dv54U8H3J8V?cluster=devnet

## Prompt Used
Using Devnet
```
i want to open a single sided position in pool 7MghXMotsf9CLr6Z9obV8g9Kt2y1Mqn6wXm2mdPhRnMe
```
then provide details

## Additional Notes

## Checklist
- [x] I have tested these changes locally
- [ ] I have updated the documentation
- [x] I have added a transaction link
- [x] I have added the prompt used to test it

src/tools/orca_close_position.ts

@@ -5,7 +5,7 @@ import {
   VersionedTransaction,
 } from "@solana/web3.js";
 import { SolanaAgentKit } from "../agent";
-import { Wallet } from "@coral-xyz/anchor";
+import { Wallet } from "../utils/keypair";
 import {
   ORCA_WHIRLPOOL_PROGRAM_ID,
   WhirlpoolContext,

src/tools/orca_create_clmm.ts

@@ -5,7 +5,7 @@ import {
   VersionedTransaction,
 } from "@solana/web3.js";
 import { SolanaAgentKit } from "../agent";
-import { Wallet } from "@coral-xyz/anchor";
+import { Wallet } from "../utils/keypair";
 import { Decimal } from "decimal.js";
 import {
   ORCA_WHIRLPOOL_PROGRAM_ID,

src/tools/orca_create_single_sided_liquidity_pool.ts

@@ -5,7 +5,8 @@ import {
   VersionedTransaction,
 } from "@solana/web3.js";
 import { SolanaAgentKit } from "../agent";
-import { BN, Wallet } from "@coral-xyz/anchor";
+import { BN } from "@coral-xyz/anchor";
+import { Wallet } from "../utils/keypair";
 import { Decimal } from "decimal.js";
 import {
   PDAUtil,

src/tools/orca_open_centered_position_with_liquidity.ts

@@ -6,7 +6,7 @@ import {
   VersionedTransaction,
 } from "@solana/web3.js";
 import { SolanaAgentKit } from "../agent";
-import { Wallet } from "@coral-xyz/anchor";
+import { Wallet } from "../utils/keypair";
 import { Decimal } from "decimal.js";
 import {
   ORCA_WHIRLPOOL_PROGRAM_ID,

src/tools/orca_open_single_sided_position.ts

@@ -1,11 +1,12 @@
 import {
   Keypair,
   PublicKey,
+  TransactionInstruction,
   TransactionMessage,
   VersionedTransaction,
 } from "@solana/web3.js";
 import { SolanaAgentKit } from "../agent";
-import { Wallet } from "@coral-xyz/anchor";
+import { Wallet } from "../utils/keypair";
 import { Decimal } from "decimal.js";
 import {
   ORCA_WHIRLPOOL_PROGRAM_ID,
@@ -119,17 +120,17 @@ export async function orcaOpenSingleSidedPosition(
       lowerTick,
       upperTick,
     ]);
-    let txIds: string = "";
+    let instructions: TransactionInstruction[] = [];
+    let signers: Keypair[] = [];
     if (txBuilderTickArrays !== null) {
       const txPayloadTickArrays = await txBuilderTickArrays.build();
       const txPayloadTickArraysDecompiled = TransactionMessage.decompile(
         (txPayloadTickArrays.transaction as VersionedTransaction).message,
       );
-      const instructions = txPayloadTickArraysDecompiled.instructions;
-      const signers = txPayloadTickArrays.signers as Keypair[];
-
-      const tickArrayTxId = await sendTx(agent, instructions, signers);
-      txIds += tickArrayTxId + ",";
+      instructions = instructions.concat(
+        txPayloadTickArraysDecompiled.instructions,
+      );
+      signers = signers.concat(txPayloadTickArrays.signers as Keypair[]);
     }
 
     const tokenExtensionCtx: TokenExtensionContextForPool = {
@@ -161,14 +162,13 @@ export async function orcaOpenSingleSidedPosition(
     const txPayloadDecompiled = TransactionMessage.decompile(
       (txPayload.transaction as VersionedTransaction).message,
     );
-    const instructions = txPayloadDecompiled.instructions;
-    const signers = txPayload.signers as Keypair[];
+    instructions = instructions.concat(txPayloadDecompiled.instructions);
+    signers = signers.concat(txPayload.signers as Keypair[]);
 
-    const positionTxId = await sendTx(agent, instructions, signers);
-    txIds += positionTxId;
+    const txId = await sendTx(agent, instructions, signers);
 
     return JSON.stringify({
-      transactionIds: txIds,
+      transactionIds: txId,
       positionMint: positionMint.toString(),
     });
   } catch (error) {

src/utils/keypair.ts

@@ -1,7 +1,35 @@
-import { Keypair } from "@solana/web3.js";
+import { Keypair, PublicKey, Transaction, VersionedTransaction } from "@solana/web3.js";
 import bs58 from "bs58";
 
 export const keypair = Keypair.generate();
 
 console.log(keypair.publicKey.toString());
 console.log(bs58.encode(keypair.secretKey));
+
+
+export class Wallet {
+  private _signer: Keypair;
+
+  constructor(signer: Keypair) {
+    this._signer = signer;
+  }
+
+  async signTransaction<T extends Transaction | VersionedTransaction>(tx: T): Promise<T> {
+    if (tx instanceof Transaction) {
+      tx.sign(this._signer);
+    } else if (tx instanceof VersionedTransaction) {
+      tx.sign([this._signer]);
+    } else {
+      throw new Error("Unsupported transaction type");
+    }
+    return tx;
+  }
+
+  async signAllTransactions<T extends Transaction | VersionedTransaction>(txs: T[]): Promise<T[]> {
+    return Promise.all(txs.map((tx) => this.signTransaction(tx)));
+  }
+
+  get publicKey(): PublicKey {
+    return this._signer.publicKey;
+  }
+}