166 lines
6.2 KiB
Markdown
166 lines
6.2 KiB
Markdown
**English** | [Русский](../../docs.ru/back-docs/blockchain-integration-technical.md)
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# Digital Legal Entity (DLE) Blockchain Integration
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## Table of Contents
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1. [Introduction](#introduction)
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2. [Smart Contract Architecture](#smart-contract-architecture)
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3. [DLE Core Contract](#dle-core-contract)
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4. [Module System](#module-system)
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5. [Multichain Architecture](#multichain-architecture)
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6. [Voting (Governance) System](#voting-governance-system)
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7. [Smart Contract Deployment](#smart-contract-deployment)
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8. [Wallet Authentication](#wallet-authentication)
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9. [Frontend Integration](#frontend-integration)
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10. [Security](#security)
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11. [Practical Examples](#practical-examples)
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---
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## Introduction
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Digital Legal Entity (DLE) uses blockchain for **tokenized governance** (similar to a blockchain-based joint-stock company) and **transparent decision-making** via smart contracts.
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### Why Blockchain in DLE?
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1. **Governance like a joint-stock company** — decisions by token holders through on-chain voting
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2. **Transparency** — all votes and operations recorded on blockchain
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3. **Censorship resistance** — smart contract enforces token holder rights
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4. **Immutability** — decision history cannot be altered
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5. **Multichain support** — operation across multiple chains
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### DLE Governance Model
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| Aspect | Implementation |
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|--------|----------------|
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| **Voting** | Token holders (as shareholders) |
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| **Quorum** | 51%+ of tokens to pass decisions |
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| **Asset distribution** | Via voting (as in JSC) |
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| **Parameter changes** | Via token holder voting |
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| **Application code** | Proprietary (author) |
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| **Updates** | Author develops; token holders vote on priorities |
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### Supported Blockchains
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DLE works with **EVM-compatible** networks: Ethereum (mainnet & testnets), Polygon, Arbitrum, BSC, Base, and others.
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---
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## Smart Contract Architecture
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DLE ecosystem: **DLE Core Contract** (ERC20Votes, tokens, proposals, multichain) ↔ **Modules** (HierarchicalVotingModule, TreasuryModule, TimelockModule) ↔ **DLEReader** (batch reads, RPC optimization).
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Standards: OpenZeppelin ERC20, ERC20Votes, ERC20Permit, ReentrancyGuard, ECDSA.
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---
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## DLE Core Contract
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File: `backend/contracts/DLE.sol`
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Structures: **DLEInfo** (name, symbol, location, coordinates, jurisdiction, okvedCodes, kpp, creationTimestamp, isActive), **Proposal** (id, description, forVotes, againstVotes, executed, canceled, deadline, initiator, operation, governanceChainId, targetChains, snapshotTimepoint, hasVoted).
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### Main Features
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- **Governance tokens (ERC20):** 1 token = 1 vote; transfers disabled (only via governance); EIP-712 for meta-transactions.
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- **Voting (ERC20Votes):** snapshots (flash-loan protection), votes from past block, optional delegation.
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- **Multichain:** same address across chains (deterministic deploy); voting on one chain; execution on target chains.
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- **Modules:** mapping(bytes32 => address) modules, activeModules; add/remove only via voting.
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### Operations Available via Voting
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_addModule, _removeModule, _addSupportedChain, _removeSupportedChain, _transferTokens, _updateDLEInfo, _updateQuorumPercentage, _updateVotingDurations.
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---
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## Module System
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### 1. HierarchicalVotingModule
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DLE can hold tokens of other DLEs and vote in them. Functions: addExternalDLE, createProposalInExternalDLE, voteInExternalDLE.
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### 2. TreasuryModule
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Treasury and asset management. transferTokens(token, recipient, amount) only callable by DLE contract. getTokenBalance(token).
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### 3. TimelockModule
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Delayed execution (timelock), cancel before execution. scheduleProposal(proposalId, operation, delay), executeTimelockProposal(operationHash).
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### 4. DLEReader
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Batch read: getDLEFullInfo(dleAddress), getAllProposals(dleAddress).
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---
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## Multichain Architecture
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Deterministic deploy: same address on all chains. Voting on one chain (governance chain); execution on target chains via executeWithSignatures(proposalId, operationHash, signers, signatures).
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---
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## Voting (Governance) System
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**createProposal(description, duration, operation, chainId, targetChains, initiator)** — returns proposalId.
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**vote(proposalId, support)** — true = For, false = Against.
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**execute(proposalId)** — when deadline passed, quorum reached, For > Against, not executed.
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**Quorum:** quorumPercentage of totalSupply; change only via voting.
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---
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## Smart Contract Deployment
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**Script:** `backend/scripts/deploy/deploy-multichain.js` — multichain deploy, deterministic address, verification, retry, nonce management. Run: `yarn deploy:multichain`.
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**Modules:** `backend/scripts/deploy/deploy-modules.js` — `yarn deploy:modules`. Config in DB (settings: supported_chain_ids, rpc_providers, dle_config). Verification via Etherscan API; supported: Etherscan, Polygonscan, Arbiscan, BSCScan, Basescan.
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---
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## Wallet Authentication
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**SIWE (Sign-In with Ethereum):** request nonce → sign message in wallet → POST signature → backend verifies signature and token balance → session created. getUserAccessLevel(address) from contract balance and thresholds (editor, readonly).
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---
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## Frontend Integration
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Connect wallet (MetaMask/WalletConnect), sign SIWE message, authenticateWithWallet. getDLEContract, createProposal, voteOnProposal, getProposal. Vue component example for proposal card and vote buttons.
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---
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## Security
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See [DLE Security](../security.md). Summary: ReentrancyGuard, transfers disabled, vote snapshots, EIP-712, parameter validation, custom errors.
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---
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## Practical Examples
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See [Blockchain for Business](../blockchain-for-business.md). Technical scenarios: multichain deploy, adding modules, hierarchical voting, treasury management.
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---
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## Conclusion
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Blockchain in DLE provides: governance like a JSC, full transparency, multichain support, modular design, OpenZeppelin-based security.
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### Resources
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- [Main README](../../README.md)
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- [FAQ](https://github.com/VC-HB3-Accelerator/.github/blob/main/en/FAQ.md)
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- [Setup](./setup-instruction.md)
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- [Terms](../service-terms.md)
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- [Legal](../../legal.en/README.md)
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**Contacts:** https://hb3-accelerator.com/ | info@hb3-accelerator.com | https://github.com/VC-HB3-Accelerator
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---
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**© 2024-2025 Alexander Viktorovich Tarabanov. All rights reserved.**
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**Last updated:** October 2025
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