141 lines
3.9 KiB
Python
Executable File
141 lines
3.9 KiB
Python
Executable File
"""
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Smart Contract Processing Logic
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This file contains the transaction processing logic for your smart contract.
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Modify the `process` function to implement your business logic.
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"""
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import json
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from dataclasses import dataclass
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from typing import Any, Optional
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# =============================================================================
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# SMART CONTRACT IMPLEMENTATION - MODIFY THIS FILE
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# =============================================================================
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@dataclass
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class TransactionHeader:
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"""Transaction metadata from Dragonchain."""
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tag: str
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dc_id: str
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txn_id: str
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block_id: str
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txn_type: str
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timestamp: str
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invoker: str
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@classmethod
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def from_dict(cls, data: dict[str, Any]) -> "TransactionHeader":
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"""Parse header from dictionary."""
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return cls(
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tag=data.get("tag", ""),
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dc_id=data.get("dc_id", ""),
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txn_id=data.get("txn_id", ""),
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block_id=data.get("block_id", ""),
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txn_type=data.get("txn_type", ""),
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timestamp=data.get("timestamp", ""),
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invoker=data.get("invoker", ""),
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)
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@dataclass
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class Transaction:
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"""
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Parsed transaction from the server.
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Customize this class to match your transaction payload structure.
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"""
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version: str
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header: TransactionHeader
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payload: dict[str, Any]
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@classmethod
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def from_json(cls, json_str: str) -> "Transaction":
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"""Parse a transaction from JSON string."""
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data = json.loads(json_str)
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return cls(
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version=data.get("version", ""),
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header=TransactionHeader.from_dict(data.get("header", {})),
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payload=data.get("payload", {}),
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)
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@dataclass
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class ProcessResult:
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"""Result from the process function."""
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data: Optional[dict[str, Any]] = None
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output_to_chain: bool = True
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error: Optional[str] = None
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def process(
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tx_json: str,
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env_vars: dict[str, str],
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secrets: dict[str, str],
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) -> ProcessResult:
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"""
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Process an incoming transaction.
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Implement your smart contract logic here.
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Args:
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tx_json: Raw transaction JSON string
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env_vars: Environment variables passed from the server
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secrets: Secrets passed from the server (e.g., API keys, credentials)
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Returns:
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ProcessResult containing the result data, whether to output to chain, and any error
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"""
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try:
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# Parse the transaction JSON
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tx = Transaction.from_json(tx_json)
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except json.JSONDecodeError as e:
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return ProcessResult(error=f"Failed to parse transaction: {e}")
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# ==========================================================================
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# TODO: Implement your smart contract logic here
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# ==========================================================================
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#
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# Example: Access transaction data
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# txn_id = tx.header.txn_id
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# txn_type = tx.header.txn_type
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# payload = tx.payload
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#
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# Example: Access environment variables
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# sc_name = env_vars.get("SMART_CONTRACT_NAME")
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# dc_id = env_vars.get("DRAGONCHAIN_ID")
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#
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# Example: Access secrets
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# api_key = secrets.get("SC_SECRET_MY_API_KEY")
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#
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# Example: Process based on payload action
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# action = tx.payload.get("action")
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# if action == "create":
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# # Handle create operation
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# pass
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# elif action == "update":
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# # Handle update operation
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# pass
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# else:
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# return ProcessResult(error=f"Unknown action: {action}")
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# Default implementation: echo back the transaction
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result = {
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"status": "processed",
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"transaction_id": tx.header.txn_id,
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"txn_type": tx.header.txn_type,
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"payload": tx.payload,
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"message": "Transaction processed successfully",
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}
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return ProcessResult(
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data=result,
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output_to_chain=True,
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error=None,
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)
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