SDK Status

Current implementation status. No roadmaps, no promises.

TypeScript SDK

Published: @selendrajs/sdk on npm

Production Ready (Use in Production)

Substrate Features:

• ✓ Staking operations (bond, nominate, validate, chill, unbond)
• ✓ Treasury (propose spend, query proposals, query approvals)
• ✓ Validator queries (current era, next era, reserved)
• ✓ Council governance (query members, proposals, voting)
• ✓ Democracy (referendums, public proposals, voting, delegation)
• ✓ Council elections (members, candidates, voting, candidacy)
• ✓ Preimage support (for governance proposals)
• ✓ Account management (balance, account info, transfer)
• ✓ Unified accounts (Substrate ↔ EVM conversion)
• ✓ Aleph consensus queries

React Integration:

• ✓ 15 production hooks
• ✓ Provider component
• ✓ Wallet connector
• ✓ Balance display components
• ✓ Transaction buttons
• ✓ Event listeners
• ✓ Block subscriptions

Test Coverage:

• 129 tests written
• 70 passing
• Known failures in network-dependent tests

Beta (Use with Caution)

EVM Features:

• Beta: getBalance() - Works
• Beta: getBlockNumber() - Works
• Beta: getTransactionCount() - Works
• Beta: Basic transfers - Works
• Beta: Contract calls - Limited
• ✗ Contract deployment - Not implemented (5 TODO methods)
• ✗ Gas estimation - Not implemented (2 TODO methods)
• ✗ Transaction history - Not implemented
• ✗ Event filtering - Not implemented
• ✗ EIP-712 signing - Not implemented

Known Issues:

• 17 TODOs in EVM client
• No SEL price oracle integration
• No cross-chain bridge support

Not Ready

Features Not Implemented:

• Contract metadata parsing (incomplete)
• Advanced contract interaction patterns
• Batch transactions (utility pallet needs work)
• Multi-signature operations
• Identity pallet integration

Rust SDK

Development Only (Do Not Use)

Status: 58% complete

What Exists:

• Basic wrapper around selendra_client v1.0.1
• Keypair generation
• Connection management
• Staking methods (newly implemented)
• Governance methods (newly implemented)
• Account info queries (newly implemented)

What Doesn't Work:

• Examples fail to compile (wasmtime conflicts)
• Limited testing
• No production deployments
• Documentation incomplete

Current State:

• Library compiles with 0 errors
• 68 documentation warnings
• Not published to crates.io yet
• Use TypeScript SDK instead

Implementation Percentages

What We're Not Doing

No Roadmap Published:

• We don't promise future features
• We don't commit to timelines
• We don't speculate on capabilities

Use What Works:

• TypeScript + Substrate = Production ready
• TypeScript + EVM = Use web3.js instead
• Rust = Wait or contribute

Known Limitations

TypeScript SDK

Substrate:

• Single nominator only (utility batch not implemented)
• No multi-sig support
• No identity pallet
• No proxy accounts

EVM:

• Can't deploy contracts
• Can't estimate gas accurately
• No transaction history
• No event log filtering
• No ENS support

React:

• Requires React ≥18.0.0
• No React Native support
• Bundle size: ~300KB (medium)

Rust SDK

Major Issues:

• Wasmtime version conflict (6.0.2 vs 8.0.1)
• Examples don't link
• Limited real-world testing
• No production users

Missing Features:

• No async runtime flexibility (tokio only)
• No error recovery
• No connection pooling
• No automatic reconnection

Performance

TypeScript SDK:

• Initial connection: ~1-2 seconds
• Query latency: ~100-300ms (network dependent)
• Transaction submit: ~1 second + block time
• Event subscription: ~50ms overhead

Rust SDK:

• Not benchmarked
• No performance guarantees

Breaking Changes History

v1.0.0 (Current):

• First stable release
• API may change in 1.x updates
• Substrate features locked
• EVM features may change

Migration Risk:

• Substrate APIs: Low (stable)
• EVM APIs: High (incomplete)
• React hooks: Low (stable)

Support Level

What We Support:

• TypeScript Substrate features
• React hooks
• Unified accounts
• Bug fixes for production features

What We Don't Support:

• EVM features (beta, use at own risk)
• Rust SDK (development only)
• Custom chain configurations
• Non-standard pallets

Built on:

• Polkadot.js for Substrate functionality
• Ethers.js for EVM functionality
• Substrate types and runtime

Testing Against Live Network

Testnet:

• Substrate features: Tested
• Staking operations: Tested
• Governance: Tested
• EVM: Partially tested

Mainnet:

• Used in production: Unknown
• Known issues: None reported
• Monitoring: No official tracking

Decision Matrix

Use TypeScript SDK If:

You need:

• Substrate staking
• Governance tools
• React integration
• Unified accounts

Don't Use TypeScript SDK If:

You need:

• Full EVM support (use web3.js)
• Multi-sig operations
• Identity management
• Custom pallets

Don't Use Rust SDK:

✗ Not ready for any use case

Getting Help

Production Issues:

• GitHub Issues (response: best effort)
• GitHub Discussions (community Q&A)
• No SLA, no guaranteed response time

Beta Features:

• We may not fix issues
• Use at own risk
• Contribute fixes welcome

Development Features:

• No support provided
• Contributions welcome
• No timeline for completion

Version Policy

Semantic Versioning:

• Major (X.0.0): Breaking changes
• Minor (1.X.0): New features (backward compatible)
• Patch (1.0.X): Bug fixes

Current: v1.0.0
Next planned: Unknown

Reality Check

We built this for Substrate dApps. EVM support was added but not completed. Rust SDK exists but isn't production ready.

If you need:

• Substrate features - Use this SDK
• EVM features - Use web3.js or ethers.js
• Both - Use both libraries, don't compromise

No marketing promises. Use what works.