feat: Add Solana network support

[AugustoL]

Summary

Add support for Solana network exploration in OpenScan.

Context

Solana is non-EVM but has smart contract capabilities (programs). Key differences:

• Different RPC methods (Solana JSON-RPC API)
• Account-based model (not EVM accounts, not UTXOs)
• Programs instead of smart contracts
• SPL tokens instead of ERC standards
• Different transaction structure (instructions, signers)

Scope

explorer-network-connectors

• Create Solana RPC client adapter
• Implement Solana-specific data fetchers (blocks/slots, transactions, accounts)
• Handle program account lookups

explorer-metadata

• Add Solana network configuration
• Add Solana logo and branding assets

explorer (this repo)

• Add Solana network to networks.json
• Create Solana-specific adapters in services/
• Adapt UI components for Solana data model
  • Slots instead of blocks
  • Instructions instead of internal calls
  • Program interactions
• Handle Solana address format (base58)
• SPL token display and balances

Technical Considerations

• Solana RPC endpoints (public nodes, self-hosted)
• High throughput chain - pagination and data limits
• Different fee structure (lamports, priority fees)
• Program IDL integration for decoded instruction display
• NFT standards (Metaplex)

Labels

enhancement, network-support