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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| use std::marker::PhantomData; | ||
|
|
||
| use crate::evm_circuit::{ | ||
| execution::ExecutionGadget, | ||
| step::ExecutionState, | ||
| util::{ | ||
| constraint_builder::{EVMConstraintBuilder, StepStateTransition}, | ||
| CachedRegion, | ||
| }, | ||
| witness::{Block, Call, ExecStep, Transaction}, | ||
| }; | ||
| use eth_types::Field; | ||
| use halo2_proofs::plonk::Error; | ||
|
|
||
| #[derive(Clone, Debug)] | ||
| pub(crate) struct PaddingGadget<F> { | ||
| _phantom: PhantomData<F>, | ||
| } | ||
|
|
||
| impl<F: Field> ExecutionGadget<F> for PaddingGadget<F> { | ||
| const NAME: &'static str = "Padding"; | ||
|
|
||
| const EXECUTION_STATE: ExecutionState = ExecutionState::Padding; | ||
|
|
||
| fn configure(cb: &mut EVMConstraintBuilder<F>) -> Self { | ||
| cb.require_step_state_transition(StepStateTransition { | ||
| ..StepStateTransition::same() | ||
| }); | ||
|
|
||
| Self { | ||
| _phantom: PhantomData, | ||
| } | ||
| } | ||
|
|
||
| fn assign_exec_step( | ||
| &self, | ||
| _region: &mut CachedRegion<'_, '_, F>, | ||
| _offset: usize, | ||
| _block: &Block<F>, | ||
| _: &Transaction, | ||
| _: &Call, | ||
| _step: &ExecStep, | ||
| ) -> Result<(), Error> { | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod test { | ||
| use crate::test_util::CircuitTestBuilder; | ||
|
|
||
| use eth_types::bytecode; | ||
|
|
||
| use mock::TestContext; | ||
|
|
||
| fn test_circuit(evm_circuit_pad_to: usize) { | ||
| let bytecode = bytecode! { | ||
| PUSH1(0) | ||
| STOP | ||
| }; | ||
|
|
||
| let ctx = TestContext::<2, 1>::simple_ctx_with_bytecode(bytecode).unwrap(); | ||
|
|
||
| // finish required tests using this witness block | ||
| CircuitTestBuilder::<2, 1>::new_from_test_ctx(ctx) | ||
| .block_modifier(Box::new(move |block| { | ||
| block.circuits_params.max_evm_rows = evm_circuit_pad_to | ||
| })) | ||
| .run(); | ||
| } | ||
|
|
||
| // Test where the EVM circuit has a fixed size and contains several Padding | ||
| // at the end after the trace steps | ||
| #[test] | ||
| fn padding() { | ||
| test_circuit(50); | ||
| } | ||
| } |
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