contract-processor.ts

/**
 * Contract Processing Processor
 *
 * Handles heavy contract operations including creation, updates, and finalization.
 * Integrates with blockchain for contract state management.
 */

import { ContractProcessingPayload, JobResult } from '../types';
import { createLogger } from '../../logger';

/**
 * Process contract-related operations
 *
 * @param payload - Contract processing data
 * @returns Job result with contract operation status
 * @throws Error if contract operation fails
 */
export async function processContractProcessing(
  payload: ContractProcessingPayload,
): Promise<JobResult> {
  const log = createLogger({
    processor: 'contract',
    action: payload.action,
    ...(payload.correlationId && { correlationId: payload.correlationId }),
    ...(payload.requestId && { requestId: payload.requestId }),
  });

  // Validate contract ID format
  if (!payload.contractId || payload.contractId.length < 10) {
    log.warn('Contract processing rejected: invalid contractId format');
    throw new Error('Invalid contract ID');
  }

  // contractId is treated as an internal identifier — log at debug only
  log.debug('Contract processing started', { contractId: payload.contractId });
  log.info('Processing contract operation', { action: payload.action });

  // Process based on action type — unknown actions fall through to default
  switch (payload.action) {
    case 'create':
      return await createContract(payload, log);
    case 'update':
      return await updateContract(payload, log);
    case 'finalize':
      return await finalizeContract(payload, log);
    default: {
      log.warn('Contract processing rejected: unsupported action', { action: payload.action });
      throw new Error(`Unsupported action: ${payload.action}`);
    }
  }
}

async function createContract(
  payload: ContractProcessingPayload,
  log: ReturnType<typeof createLogger>,
): Promise<JobResult> {
  await simulateBlockchainOperation(500);
  log.info('Contract created', { action: 'create' });

  return {
    success: true,
    message: `Contract ${payload.contractId} created`,
    data: {
      contractId: payload.contractId,
      status: 'active',
      timestamp: new Date().toISOString(),
    },
  };
}

async function updateContract(
  payload: ContractProcessingPayload,
  log: ReturnType<typeof createLogger>,
): Promise<JobResult> {
  await simulateBlockchainOperation(300);
  log.info('Contract updated', { action: 'update' });

  return {
    success: true,
    message: `Contract ${payload.contractId} updated`,
    data: {
      contractId: payload.contractId,
      metadata: payload.metadata,
      timestamp: new Date().toISOString(),
    },
  };
}

async function finalizeContract(
  payload: ContractProcessingPayload,
  log: ReturnType<typeof createLogger>,
): Promise<JobResult> {
  await simulateBlockchainOperation(800);
  log.info('Contract finalized', { action: 'finalize' });

  return {
    success: true,
    message: `Contract ${payload.contractId} finalized`,
    data: {
      contractId: payload.contractId,
      status: 'completed',
      timestamp: new Date().toISOString(),
    },
  };
}

async function simulateBlockchainOperation(delayMs: number): Promise<void> {
  return new Promise((resolve) => setTimeout(resolve, delayMs));
}