use super::Opcode;
use crate::{
circuit_input_builder::{CircuitInputStateRef, ExecStep},
operation::CallContextField,
Error,
};
use eth_types::GethExecStep;
#[derive(Debug, Copy, Clone)]
pub(crate) struct GasPrice;
impl Opcode for GasPrice {
fn gen_associated_ops(
state: &mut CircuitInputStateRef,
geth_steps: &[GethExecStep],
) -> Result<Vec<ExecStep>, Error> {
let geth_step = &geth_steps[0];
let mut exec_step = state.new_step(geth_step)?;
let value = geth_steps[1].stack.last()?;
let tx_id = state.tx_ctx.id();
state.call_context_read(
&mut exec_step,
state.call()?.call_id,
CallContextField::TxId,
tx_id.into(),
)?;
state.stack_write(
&mut exec_step,
geth_step.stack.last_filled().map(|a| a - 1),
value,
)?;
Ok(vec![exec_step])
}
}
#[cfg(test)]
mod gasprice_tests {
use crate::{
circuit_input_builder::ExecState,
evm::OpcodeId,
mock::BlockData,
operation::{CallContextField, CallContextOp, StackOp, RW},
Error,
};
use eth_types::{bytecode, evm_types::StackAddress, geth_types::GethData, Word};
use mock::test_ctx::{helpers::*, TestContext};
use pretty_assertions::assert_eq;
#[test]
fn gasprice_opcode_impl() -> Result<(), Error> {
let code = bytecode! {
#[start]
GASPRICE
STOP
};
let two_gwei = Word::from(2_000_000_000u64);
let block: GethData = TestContext::<2, 1>::new(
None,
account_0_code_account_1_no_code(code),
|mut txs, accs| {
txs[0]
.from(accs[1].address)
.to(accs[0].address)
.gas_price(two_gwei);
},
|block, _tx| block.number(0xcafeu64),
)
.unwrap()
.into();
let builder = BlockData::new_from_geth_data(block.clone()).new_circuit_input_builder();
let builder = builder
.handle_block(&block.eth_block, &block.geth_traces)
.unwrap();
let step = builder.block.txs()[0]
.steps()
.iter()
.find(|step| step.exec_state == ExecState::Op(OpcodeId::GASPRICE))
.unwrap();
let op_gasprice = &builder.block.container.stack[step.bus_mapping_instance[1].as_usize()];
assert_eq!(
(op_gasprice.rw(), op_gasprice.op()),
(
RW::WRITE,
&StackOp::new(1, StackAddress(1023usize), two_gwei)
)
);
let call_id = builder.block.txs()[0].calls()[0].call_id;
assert_eq!(
{
let operation =
&builder.block.container.call_context[step.bus_mapping_instance[0].as_usize()];
(operation.rw(), operation.op())
},
(
RW::READ,
&CallContextOp {
call_id,
field: CallContextField::TxId,
value: Word::one(),
}
)
);
Ok(())
}
}