IND-369 | Add support for batched UserOperations

[enis-incentiv]

Story

https://incentiv-net.atlassian.net/browse/IND-369

Description

This PR implements support for batched transactions in the UI-SDK, allowing developers to submit multiple transactions as a single UserOperation. This feature optimizes gas fees and ensures atomicity for dependent transactions.

Key Features

• Added batch transaction support in SimpleAccountAPI and ERC4337EthersSigner
• Implemented atomic execution for batched operations
• Added gas estimation for batch transactions

Technical Implementation

1. Batch Transaction Interface:

   • Added BatchTransactionRequest interface supporting multiple transactions
   • Each transaction includes: target address, value, and calldata

2. Atomic Execution:

   • Implemented encodeExecuteBatch for bundling multiple transactions
   • All transactions in a batch are executed atomically
   • If any transaction fails, the entire batch is reverted

3. Gas Handling:

   • Added gas estimation for batch operations
   • Proper handling of gas limits for the entire batch
   • Support for custom gas parameters (maxFeePerGas, maxPriorityFeePerGas)

Example Usage

await signer.sendBatchTransaction({
  targets: ["0xaddress1", "0xaddress2"],
  datas: ["0x", "0x"],
  values: [
    ethers.utils.parseEther("1.5"),
    ethers.utils.parseEther("2.0")
  ]
});

Testing

• Verified atomic execution of batch transactions
• Tested transfer functionality
• Validated gas estimation for batch operations
• Confirmed proper handling of transaction failures

Breaking Changes

None. This is a new feature that maintains compatibility with existing functionality.