Build LangChain Tool: NEAR Transaction Builder

Overview

Create a LangChain tool that helps agents construct and simulate NEAR transactions before execution.

Why This Matters

Agents need to build complex transactions safely. This tool provides transaction construction with validation.

Technical Requirements

• Build transfer transactions
• Construct function calls
• Batch multiple actions
• Simulate before sending
• Gas estimation

Deliverables

1. PyPI package
2. Transaction templates
3. Simulation capability
4. Clear error messages