GPU DAO CosmWasm Smart Contract

A CosmWasm smart contract for managing GPU DAO token purchases, finalization, and cross-chain operations via Paloma network integration.

Table of Contents

• Overview
• Contract Architecture
• State Management
• Function Documentation
• Security Considerations
• Testing
• Building and Deployment

Overview

This smart contract manages a GPU DAO token sale with the following key features:

• Multi-owner access control
• Token purchase tracking
• Cross-chain operations via Paloma network
• Token factory integration for denom creation and minting
• Refund mechanism
• Configurable gas and service fees

Contract Architecture

Core Modules

• contract.rs: Main contract logic with instantiate, execute, and query entry points
• msg.rs: Message definitions for contract interactions
• state.rs: State management and storage structures
• error.rs: Custom error definitions

Dependencies

• cosmwasm-std: Core CosmWasm functionality
• cw-storage-plus: Enhanced storage utilities
• ethabi: Ethereum ABI encoding for cross-chain calls
• cw2: Contract versioning

State Management

Global State

pub struct State {
    pub owners: Vec<Addr>,    // List of authorized contract owners
    pub finished: bool,       // Whether the contract has been finalized
}

Storage Maps

• PURCHASE_LIST: Maps purchaser addresses to their purchase amounts

Function Documentation

Entry Point Functions

instantiate

Purpose: Initializes the contract with initial owners and sets up the contract state.

Parameters:

• deps: Dependencies for contract operations
• _env: Contract environment (unused)
• info: Message information containing sender
• msg: Instantiation message with initial owners list

Security Checks:

• Validates all provided owner addresses
• Automatically adds the sender as an owner if not already included

Example Usage:

{
  "instantiate": {
    "owners": [
      "cosmos1abc123...",
      "cosmos1def456..."
    ]
  }
}

Security Considerations:

• ⚠️ CRITICAL: No maximum limit on number of owners
• ⚠️ CRITICAL: No validation of owner address format beyond basic validation
• ⚠️ MEDIUM: Sender is automatically added as owner without explicit consent

---

execute

Purpose: Main execution entry point that routes messages to appropriate handlers.

Message Types:

• Purchase: Record a token purchase
• Finalize: Complete the token sale and mint tokens
• Refund: Process refunds (placeholder implementation)
• SetPaloma: Configure Paloma network settings
• UpdateCompass: Update compass contract address
• UpdateRefundWallet: Update refund wallet address
• UpdateGasFee: Update gas fee configuration
• UpdateServiceFeeCollector: Update service fee collector address
• UpdateServiceFee: Update service fee amount

---

Core Business Logic Functions

execute::purchase

Purpose: Records a token purchase for a specified purchaser and amount.

Parameters:

• deps: Dependencies for contract operations
• info: Message information containing sender
• purchaser: Address of the purchaser
• amount: Purchase amount in base units

Security Checks:

• Verifies sender is an authorized owner
• Ensures contract is not already finalized

State Changes:

• Updates PURCHASE_LIST map with purchaser's total amount

Example Usage:

{
  "purchase": {
    "purchaser": "cosmos1abc123...",
    "amount": "1000000"
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of purchaser address format
• ⚠️ MEDIUM: No maximum purchase amount limits
• ⚠️ MEDIUM: No duplicate purchase prevention
• ⚠️ LOW: No minimum purchase amount validation

---

execute::finalize

Purpose: Finalizes the token sale, creates denom, and mints initial tokens.

Parameters:

• deps: Dependencies for contract operations
• info: Message information containing sender
• mint_amount: Amount of tokens to mint
• distribute_amount: Amount to distribute
• pusd_amount: PUSD token amount

Security Checks:

• Verifies sender is an authorized owner
• Ensures contract is not already finalized

State Changes:

• Sets finished flag to true
• Creates denom via TokenFactory
• Mints specified amount of tokens

Cross-Chain Operations:

• Sends TokenFactoryMsg to create denom
• Sends TokenFactoryMsg to mint tokens

Example Usage:

{
  "finalize": {
    "mint_amount": "1000000000",
    "distribute_amount": "500000000",
    "pusd_amount": "1000000"
  }
}

Security Considerations:

• ⚠️ CRITICAL: Undefined variables subdenom, metadata, denom, denom_creator in implementation
• ⚠️ HIGH: No validation of mint amounts
• ⚠️ HIGH: No checks for reasonable token economics
• ⚠️ MEDIUM: No reentrancy protection
• ⚠️ LOW: No event emission for transparency

---

execute::refund

Purpose: Processes refunds for purchasers (placeholder implementation).

Parameters:

• deps: Dependencies for contract operations

Current Implementation: Returns success response without actual refund logic.

Security Considerations:

• ⚠️ CRITICAL: Function is not implemented - no refund mechanism exists
• ⚠️ HIGH: No access control checks
• ⚠️ HIGH: No validation of refund eligibility

---

Cross-Chain Configuration Functions

execute::set_paloma

Purpose: Configures Paloma network settings for cross-chain operations.

Parameters:

• deps: Dependencies for contract operations
• chain_id: Target chain identifier

Security Checks:

• Verifies sender is an authorized owner

Cross-Chain Operations:

• Sends SchedulerMsg to execute set_paloma function on target chain

Example Usage:

{
  "set_paloma": {
    "chain_id": "ethereum-1"
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of chain_id format
• ⚠️ MEDIUM: No verification of target chain existence
• ⚠️ LOW: No error handling for failed cross-chain calls

---

execute::update_compass

Purpose: Updates the compass contract address for cross-chain operations.

Parameters:

• deps: Dependencies for contract operations
• chain_id: Target chain identifier
• new_compass: New compass contract address

Security Checks:

• Verifies sender is an authorized owner
• Validates new_compass address format

Cross-Chain Operations:

• Sends SchedulerMsg to execute update_compass function on target chain

Example Usage:

{
  "update_compass": {
    "chain_id": "ethereum-1",
    "new_compass": "0x1234567890abcdef..."
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of contract address checksum
• ⚠️ MEDIUM: No verification that address is a valid contract
• ⚠️ LOW: No event emission for address changes

---

execute::update_refund_wallet

Purpose: Updates the refund wallet address for cross-chain operations.

Parameters:

• deps: Dependencies for contract operations
• chain_id: Target chain identifier
• new_refund_wallet: New refund wallet address

Security Checks:

• Verifies sender is an authorized owner
• Validates new_refund_wallet address format

Cross-Chain Operations:

• Sends SchedulerMsg to execute update_refund_wallet function on target chain

Example Usage:

{
  "update_refund_wallet": {
    "chain_id": "ethereum-1",
    "new_refund_wallet": "0xabcdef1234567890..."
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of wallet address checksum
• ⚠️ MEDIUM: No verification that address can receive funds
• ⚠️ LOW: No event emission for wallet changes

---

execute::update_gas_fee

Purpose: Updates the gas fee configuration for cross-chain operations.

Parameters:

• deps: Dependencies for contract operations
• chain_id: Target chain identifier
• new_gas_fee: New gas fee amount (Uint256)

Security Checks:

• Verifies sender is an authorized owner

Cross-Chain Operations:

• Sends SchedulerMsg to execute update_gas_fee function on target chain

Example Usage:

{
  "update_gas_fee": {
    "chain_id": "ethereum-1",
    "new_gas_fee": "21000000000000"
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of reasonable gas fee ranges
• ⚠️ MEDIUM: No protection against excessive gas fees
• ⚠️ LOW: No event emission for fee changes

---

execute::update_service_fee_collector

Purpose: Updates the service fee collector address for cross-chain operations.

Parameters:

• deps: Dependencies for contract operations
• chain_id: Target chain identifier
• new_service_fee_collector: New service fee collector address

Security Checks:

• Verifies sender is an authorized owner
• Validates new_service_fee_collector address format

Cross-Chain Operations:

• Sends SchedulerMsg to execute update_service_fee_collector function on target chain

Example Usage:

{
  "update_service_fee_collector": {
    "chain_id": "ethereum-1",
    "new_service_fee_collector": "0xfedcba0987654321..."
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of address checksum
• ⚠️ MEDIUM: No verification that address can receive fees
• ⚠️ LOW: No event emission for collector changes

---

execute::update_service_fee

Purpose: Updates the service fee amount for cross-chain operations.

Parameters:

• deps: Dependencies for contract operations
• chain_id: Target chain identifier
• new_service_fee: New service fee amount (Uint256)

Security Checks:

• Verifies sender is an authorized owner

Cross-Chain Operations:

• Sends SchedulerMsg to execute update_service_fee function on target chain

Example Usage:

{
  "update_service_fee": {
    "chain_id": "ethereum-1",
    "new_service_fee": "1000000000000000000"
  }
}

Security Considerations:

• ⚠️ HIGH: No validation of reasonable fee ranges
• ⚠️ MEDIUM: No protection against excessive service fees
• ⚠️ LOW: No event emission for fee changes

---

Query Functions

query

Purpose: Handles query requests (currently unimplemented).

Current Implementation: Returns unimplemented!() error.

Security Considerations:

• ⚠️ CRITICAL: No query functionality implemented
• ⚠️ HIGH: No way to verify contract state
• ⚠️ HIGH: No transparency for purchasers

---

Security Considerations

Critical Issues

1. Incomplete Implementation: Several functions have placeholder implementations or undefined variables
2. Missing Access Control: Some functions lack proper authorization checks
3. No Query Interface: No way to verify contract state or purchase records
4. Undefined Variables: finalize function references undefined variables

High Priority Issues

1. Address Validation: Insufficient validation of cross-chain addresses
2. Amount Limits: No maximum/minimum limits on critical amounts
3. Error Handling: Limited error handling for cross-chain operations
4. Reentrancy: No protection against reentrancy attacks

Medium Priority Issues

1. Event Emission: Limited event emission for transparency
2. Parameter Validation: Insufficient validation of input parameters
3. State Consistency: No checks for state consistency across operations

Low Priority Issues

1. Gas Optimization: Some operations could be optimized for gas efficiency
2. Documentation: Limited inline documentation for complex operations

Testing

Running Tests

# Run unit tests with backtraces
RUST_BACKTRACE=1 cargo unit-test

# Run tests with specific features
cargo test --features library

# Run tests with verbose output
cargo test -- --nocapture

Test Coverage Areas

Critical Test Cases:

• Owner authorization for all privileged functions
• Purchase amount validation and limits
• Finalization state transitions
• Cross-chain message encoding
• Error handling for invalid inputs

Recommended Test Scenarios:

#[test]
fn test_owner_authorization() {
    // Test that only owners can execute privileged functions
}

#[test]
fn test_purchase_validation() {
    // Test purchase amount limits and validation
}

#[test]
fn test_finalization_flow() {
    // Test complete finalization process
}

#[test]
fn test_cross_chain_message_encoding() {
    // Test ABI encoding for cross-chain calls
}

Building and Deployment

Prerequisites

• Rust 1.58.1+
• wasm32-unknown-unknown target
• Docker (for optimization)

Building

# Install wasm target
rustup target add wasm32-unknown-unknown

# Build for development
cargo wasm

# Generate schema
cargo schema

# Optimize for production
docker run --rm -v "$(pwd)":/code \
  --mount type=volume,source="$(basename "$(pwd)")_cache",target=/target \
  --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
  cosmwasm/optimizer:0.16.1

Deployment Checklist

Pre-Deployment:

• Complete implementation of all placeholder functions
• Add comprehensive input validation
• Implement proper error handling
• Add event emission for all state changes
• Complete test coverage
• Security audit review

Deployment:

• Verify contract bytecode hash
• Test on testnet first
• Verify all cross-chain configurations
• Monitor initial transactions

Post-Deployment:

• Monitor contract events
• Verify cross-chain message delivery
• Test emergency procedures
• Document any issues found

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.