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Solana Operations ​

Balance Requirements ​

When performing transactions on Solana, it's crucial to maintain minimum SOL balances in both source and destination addresses:

  • Minimum Balance: 0.00089088 SOL (890,880 lamports)
  • This minimum balance is required to:
    • Keep the account rent-exempt
    • Allow for future transactions
    • Maintain account viability on the network

Transaction Behavior ​

Sweep Operation ​

The SweepSolanaWalletAddress service automatically ensures this minimum balance is maintained by:

  • Calculating the maximum amount that can be swept while leaving the minimum balance
  • Preventing transactions that would leave either address with less than the minimum
  • Logging warnings when balances are insufficient for sweeping

Example Calculation ​

If an address has 0.001 SOL:

  • Minimum required: 0.00089088 SOL
  • Available for sweep: 0.00010912 SOL (0.001 - 0.00089088)

If the balance is less than or equal to 0.00089088 SOL, the sweep operation will not proceed to protect the account's viability.

Implementation Details ​

Key Derivation ​

Solana addresses are derived using the following BIP44 path:

m/44'/501'/{account_index}'/0'

Where:

  • 44' - BIP44 purpose
  • 501' - Solana coin type
  • {account_index}' - Account index (0 for main account)
  • 0' - Change (always 0 for Solana)

Important Notes ​

  • Always ensure both sending and receiving addresses maintain at least 0.00089088 SOL
  • This minimum balance requirement is separate from transaction fees
  • When implementing new transaction types, remember to account for this minimum balance requirement
  • All amounts in transactions should consider this minimum balance to prevent account deactivation