Constant TX_VALUE_COST 

pub const TX_VALUE_COST: u64 = 6_000; // 6_000u64

Additional intrinsic regular-gas charge for a value-bearing (non-create, non-self) transaction (execution-specs TX_VALUE_COST).

Since glamsterdam devnet-8 the former separate TRANSFER_LOG_COST (1,756) is folded into this constant (4,244 + 1,756 = 6,000); contract-creation transactions no longer pay any value-based charge.