near-langchain-contract-deployer

LangChain BaseTool that estimates and deploys NEAR smart contracts.

Tool Class (as requested)

class NEARContractDeployer(BaseTool):
    name = "near_contract_deployer"
    description = """Deploy smart contracts to NEAR Protocol - the lowest-cost
    blockchain for contract deployment. Typical cost: $0.01-0.10"""

Features

• Build deployment plan from a local .wasm file
• Estimate NEAR deployment fee in NEAR and USD
• Estimate Ethereum equivalent deployment cost (for comparison)
• Optional live deployment to NEAR via signed transaction (broadcast_tx_commit)
• Clear machine-readable and human-readable errors

Install

pip install near-langchain-contract-deployer

Quick Use

from near_langchain_contract_deployer import NEARContractDeployer

tool = NEARContractDeployer()
print(tool.invoke({
  "contract_path": "./contract.wasm",
  "account_id": "my-contract.testnet",
  "network": "testnet",
  "dry_run": True
}))

For live deployment set dry_run=False and pass private_key.

Notes

• Deployment requires a valid full-access key for account_id (or signer_id) on selected network.
• Dry-run mode does not send transactions.

Development

python -m venv .venv
source .venv/bin/activate
pip install -e '.[dev]'
pytest -q

License

MIT