Constant TAPROOT_SCRIPT_LENGTH 

pub const TAPROOT_SCRIPT_LENGTH: usize = 34 /* 34usize */;

Taproot script length (BIP341)

Taproot P2TR script format: OP_1 <32-byte-program>

• OP_1 (0x51): 1 byte
• Push opcode (0x20): 1 byte
• Program hash: 32 bytes Total: 34 bytes