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fix: rent for SIMD 0194 #30

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fix: rent for SIMD 0194 #30

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9 changes: 8 additions & 1 deletion src/trident_svm.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -204,7 +204,14 @@ impl TridentSVM {
&latest_blockhash,
fees.fee_calculator.lamports_per_signature,
)]));
self.set_sysvar(&Rent::default());
// Match SIMD-0194 / LiteSVM: Pinocchio 0.11+ reads only the first 8 bytes as
// lamports_per_byte and does not apply exemption_threshold. Classic Rent::default()
// (3480 / 2.0) would under-quote by 2x vs runtime settlement and SPL Token-2022.
let mut rent_account = Rent::default();
rent_account.exemption_threshold = 1.0;
rent_account.lamports_per_byte_year =
solana_rent::DEFAULT_LAMPORTS_PER_BYTE_YEAR.saturating_mul(2);
self.set_sysvar(&rent_account);
self.set_sysvar(&SlotHashes::new(&[(0, latest_blockhash)]));
self.set_sysvar(&SlotHistory::default());
self.set_sysvar(&StakeHistory::default());
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