Cypher Protocol Substreams

A comprehensive Substreams package for monitoring and processing Cypher Protocol events and calls on Ethereum networks. This project provides foundational modules for extracting, filtering, and processing blockchain data with a specific focus on the Cypher Protocol ecosystem.

Overview

This Substreams package is designed to monitor and process events from the Cypher Protocol smart contracts, including:

• VotingEscrow: NFT-based voting power system
• Election: Voting and bribe management
• CypherToken: ERC-20 governance token
• RewardDistributor: Merkle tree-based reward distribution
• DistributionModule: Token emission management
• Airdrop: Merkle tree-based airdrop distribution

Features

Core Functionality

• Event Processing: Extract and decode all Ethereum events from successful transactions
• Call Processing: Monitor all contract calls including internal calls
• Advanced Filtering: Filter events and calls using complex expressions with logical operators
• Transfer Tracking: Monitor both ERC-20 and ERC-721 transfer events
• Contract-Specific Processing: Specialized event decoding for Cypher Protocol contracts
• Dynamic Configuration: Configurable contract addresses without code changes

Key Modules

Basic Event and Call Processing

• all_events: Extracts all events from successful transactions
• all_calls: Extracts all calls including internal calls
• index_events: Creates searchable indexes for events
• index_calls: Creates searchable indexes for calls
• index_events_and_calls: Combined indexing for both events and calls

Advanced Filtering

• filtered_events: Filter events by address and signature
• filtered_calls: Filter calls by contract, caller, and method
• filtered_transactions: Filter complete transactions
• filtered_events_and_calls: Combined filtering of events and calls

Cypher Protocol Specific

• filter_cypher_events: Enhanced processor with configurable contract addresses

Installation and Setup

Prerequisites

• Rust toolchain (latest stable)
• Substreams CLI
• WASM target: rustup target add wasm32-unknown-unknown

Building

# Build the WASM module
cargo build --target wasm32-unknown-unknown --release

# The compiled module will be available at:
# target/wasm32-unknown-unknown/release/cypher_protocol.wasm

Configuration

The package uses configurable contract addresses that can be set via parameters:

# Example parameter format for filter_cypher_events:
"query_string|contract_addresses_string"

# Where contract_addresses_string is:
"voting_escrow:0xaddr1,election:0xaddr2,cypher_token:0xaddr3,reward_distributor:0xaddr4,distribution_module:0xaddr5,airdrop:0xaddr6"

Usage Examples

Basic Event Filtering

# Filter events by address and signature
substreams run substreams.yaml filtered_events \
  --param='(evt_addr:0x1234... || evt_addr:0x5678...) && evt_sig:0xdeadbeef...'

Call Filtering

# Filter calls by contract and method
substreams run substreams.yaml filtered_calls \
  --param='call_method:0xa9059cbb && call_to:0xdac17f958d2ee523a2206206994597c13d831ec7'

Cypher Protocol Events

# Process Cypher Protocol events with configurable addresses
substreams run substreams.yaml filter_cypher_events \
  --param='(call_to:0x3cb7367ac1e6a439da1f1717f8055f02e3c9d56e || call_to:0xcccd218a58b53c67fc17d8c87cb90d83614e35fd)|voting_escrow:0xf65e1e90269373a60b2abdaf2dc52b2a5a8fdb5c,election:0x0c132c3841b9cdbb3a305275ee02d571a551ce70,cypher_token:0xd36f05bc341b3286c1fd15a809d3315741796f26,reward_distributor:0x7f91980325a294b2affaac6f26e1644864160d41,distribution_module:0x636bdc02170e04c917204f858fa110ce9a5bf05f,airdrop:0xfcbebe31e067a8c460563bcb1d7458fae1949f29'

Supported Event Types

VotingEscrow Events

• CreateLock: User creates new lock position
• DepositFor: Add tokens to existing lock
• Withdraw: Withdraw expired lock
• IncreaseUnlockTime: Extend lock duration
• LockIndefinite: Convert to indefinite lock
• UnlockIndefinite: Convert back to timed lock
• Merge: Merge two lock positions
• Transfer: NFT Transfer (ERC-721)
• Approval: NFT Approval (ERC-721)

Election Events

• Vote: User votes for candidate
• BribeClaimed: User claims bribe reward
• BribeAdded: Bribe added for candidate
• CandidateEnabled: Candidate enabled for voting
• CandidateDisabled: Candidate disabled
• BribeTokenEnabled: Token approved for bribes
• BribeTokenDisabled: Token disabled for bribes

CypherToken Events (ERC-20)

• Transfer: ERC-20 Transfer
• Approval: ERC-20 Approval

RewardDistributor Events

• RootAdded: New merkle root added
• Claimed: User claimed reward

DistributionModule Events

• TokensEmitted: Tokens emitted to recipient
• EmissionAddressUpdated: Emission address changed

Airdrop Events

• CypherTokenClaimed: CypherToken claimed
• VeCypherNftClaimed: VeCypherNft claimed

Query Language

The package supports a powerful query language for filtering events and calls:

Operators

• ||: Logical OR
• &&: Logical AND
• (): Parentheses for grouping

Event Filters

• evt_addr:0x...: Filter by event contract address
• evt_sig:0x...: Filter by event signature

Call Filters

• call_to:0x...: Filter by called contract address
• call_from:0x...: Filter by caller address
• call_method:0x...: Filter by method signature (4 bytes)

Example Queries

# Complex event filtering
'(evt_addr:0x1234... || evt_addr:0x5678...) && evt_sig:0xdeadbeef...'

# Combined event and call filtering
'evt_sig:0x9bb8f83800000000000000000000000000000000000000000000000000000000 || (call_method:0xa9059cbb && call_to:0xdac17f958d2ee523a2206206994597c13d831ec7)'

Output Formats

ProcessedEvents

The filter_cypher_events module outputs structured data:

message ProcessedEvents {
  repeated TransferEvent transfer_events = 1;
  repeated ContractEvent contract_events = 2;
  Clock clock = 3;
}

message TransferEvent {
  string from = 1;
  string to = 2;
  string value = 3;
  string token_id = 4;
  string hash = 5;
  uint64 block_number = 6;
  uint64 timestamp = 7;
}

message ContractEvent {
  string contract_name = 1;
  string event_name = 2;
  map<string, string> event_data = 3;
  uint64 block_number = 4;
  string transaction_hash = 5;
  uint64 timestamp = 6;
  string contract_address = 7;
}

Error Handling and Logging

The package includes comprehensive error handling and logging:

• Verbose Comments: All functions include detailed documentation
• Standard Logging: Uses Substreams logging framework
• Error Handling: Graceful handling of malformed data
• Debug Information: Extensive debug logging for troubleshooting

Development

Project Structure

src/
├── calls.rs          # Call processing modules
├── events.rs         # Event processing modules
├── combined.rs       # Combined processing and Cypher Protocol specific logic
├── lib.rs           # Module exports and initialization
└── pb/              # Generated protobuf bindings

Testing

# Run unit tests
cargo test

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

Adding New Event Types

To add support for new event types:

1. Add event signature constants in combined.rs
2. Add event processing logic in extract_event_data()
3. Create specific extractor functions for the new event
4. Update the event matching logic in process_contract_event()

Dependencies

• substreams: Core Substreams framework
• substreams-ethereum: Ethereum-specific functionality
• num-bigint: Big integer arithmetic for token amounts
• hex: Hexadecimal encoding/decoding
• ethabi: Ethereum ABI parsing
• anyhow: Error handling

License

This project is part of the Substreams foundational modules ecosystem.

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes with comprehensive logging and error handling
4. Add tests for new functionality
5. Submit a pull request

Support

For issues and questions:

• Check the Substreams documentation
• Review the extensive logging output for debugging
• Ensure contract addresses are correctly configured
• Verify event signatures match your contract ABIs