feat: Goa GEL Blockchain e-Licensing Platform - Full Stack Implementation
Complete implementation of the Goa Government e-Licensing platform with: Backend: - NestJS API with JWT authentication - PostgreSQL database with Knex ORM - Redis caching and session management - MinIO document storage - Hyperledger Besu blockchain integration - Multi-department workflow system - Comprehensive API tests (266/282 passing) Frontend: - Angular 21 with standalone components - Angular Material + TailwindCSS UI - Visual workflow builder - Document upload with progress tracking - Blockchain explorer integration - Role-based dashboards (Admin, Department, Citizen) - E2E tests with Playwright (37 tests) Infrastructure: - Docker Compose orchestration - Blockscout blockchain explorer - Development and production configurations
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Mahi
188
blockchain/contracts/WorkflowRegistry.sol
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188
blockchain/contracts/WorkflowRegistry.sol
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import "@openzeppelin/contracts/access/Ownable.sol";
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/**
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* @title WorkflowRegistry
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* @notice Registers and tracks workflow definitions on-chain
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* @dev Placeholder for future workflow verification capabilities
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*/
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contract WorkflowRegistry is Ownable {
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struct WorkflowDefinition {
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bytes32 id;
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string workflowType;
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string name;
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bytes32 definitionHash;
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uint256 version;
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uint256 timestamp;
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bool isActive;
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}
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// Mapping from workflow ID to definition
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mapping(bytes32 => WorkflowDefinition) private _workflows;
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// Mapping from workflow type to latest workflow ID
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mapping(string => bytes32) private _latestWorkflows;
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// Array of all workflow IDs
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bytes32[] private _workflowIds;
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// Counter for unique IDs
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uint256 private _workflowCounter;
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// Events
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event WorkflowRegistered(
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bytes32 indexed workflowId,
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string indexed workflowType,
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string name,
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bytes32 definitionHash,
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uint256 version
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);
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event WorkflowDeactivated(bytes32 indexed workflowId);
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event WorkflowActivated(bytes32 indexed workflowId);
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constructor() Ownable(msg.sender) {}
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/**
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* @notice Register a new workflow definition
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* @param workflowType The type of workflow (e.g., "RESORT_LICENSE")
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* @param name Human-readable name
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* @param definitionHash Hash of the workflow definition JSON
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* @return workflowId The unique workflow ID
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*/
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function registerWorkflow(
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string calldata workflowType,
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string calldata name,
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bytes32 definitionHash
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) public onlyOwner returns (bytes32) {
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require(bytes(workflowType).length > 0, "Workflow type required");
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require(bytes(name).length > 0, "Name required");
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require(definitionHash != bytes32(0), "Definition hash required");
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_workflowCounter++;
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bytes32 workflowId = keccak256(
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abi.encodePacked(workflowType, _workflowCounter, block.timestamp)
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);
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// Determine version
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uint256 version = 1;
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bytes32 latestId = _latestWorkflows[workflowType];
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if (latestId != bytes32(0)) {
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version = _workflows[latestId].version + 1;
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// Deactivate previous version
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_workflows[latestId].isActive = false;
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}
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WorkflowDefinition storage workflow = _workflows[workflowId];
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workflow.id = workflowId;
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workflow.workflowType = workflowType;
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workflow.name = name;
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workflow.definitionHash = definitionHash;
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workflow.version = version;
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workflow.timestamp = block.timestamp;
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workflow.isActive = true;
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_latestWorkflows[workflowType] = workflowId;
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_workflowIds.push(workflowId);
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emit WorkflowRegistered(
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workflowId,
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workflowType,
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name,
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definitionHash,
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version
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);
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return workflowId;
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}
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/**
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* @notice Get workflow definition by ID
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* @param workflowId The workflow ID
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* @return The WorkflowDefinition struct
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*/
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function getWorkflow(bytes32 workflowId)
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public
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view
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returns (WorkflowDefinition memory)
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{
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require(_workflows[workflowId].timestamp > 0, "Workflow not found");
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return _workflows[workflowId];
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}
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/**
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* @notice Get the latest active workflow for a type
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* @param workflowType The workflow type
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* @return The WorkflowDefinition struct
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*/
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function getLatestWorkflow(string calldata workflowType)
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public
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view
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returns (WorkflowDefinition memory)
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{
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bytes32 workflowId = _latestWorkflows[workflowType];
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require(workflowId != bytes32(0), "No workflow found for type");
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return _workflows[workflowId];
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}
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/**
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* @notice Verify a workflow definition hash
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* @param workflowId The workflow ID
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* @param definitionHash The hash to verify
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* @return True if the hash matches
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*/
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function verifyWorkflow(bytes32 workflowId, bytes32 definitionHash)
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public
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view
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returns (bool)
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{
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WorkflowDefinition memory workflow = _workflows[workflowId];
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return workflow.isActive && workflow.definitionHash == definitionHash;
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}
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/**
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* @notice Deactivate a workflow
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* @param workflowId The workflow ID
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*/
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function deactivateWorkflow(bytes32 workflowId) public onlyOwner {
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require(_workflows[workflowId].timestamp > 0, "Workflow not found");
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require(_workflows[workflowId].isActive, "Workflow already inactive");
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_workflows[workflowId].isActive = false;
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emit WorkflowDeactivated(workflowId);
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}
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/**
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* @notice Activate a workflow
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* @param workflowId The workflow ID
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*/
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function activateWorkflow(bytes32 workflowId) public onlyOwner {
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require(_workflows[workflowId].timestamp > 0, "Workflow not found");
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require(!_workflows[workflowId].isActive, "Workflow already active");
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_workflows[workflowId].isActive = true;
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emit WorkflowActivated(workflowId);
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}
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/**
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* @notice Get total workflow count
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* @return The number of registered workflows
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*/
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function getWorkflowCount() public view returns (uint256) {
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return _workflowIds.length;
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}
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/**
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* @notice Check if a workflow is active
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* @param workflowId The workflow ID
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* @return True if active
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*/
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function isWorkflowActive(bytes32 workflowId) public view returns (bool) {
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return _workflows[workflowId].isActive;
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}
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}
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