Helius SDK - v3.1.0
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    Type Alias SupportedTxVersion

    SupportedTxVersion: TransactionVersion

    A transaction version the SDK can build: "legacy", 0, or 1.

    Version 1 (SIMD-0385) raises the size limit from 1,232 to 4,096 bytes (SIMD-0296). It carries its compute-unit limit and priority fee in a header config rather than in ComputeBudgetProgram instructions, and it does not support address lookup tables.