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use util::{Bytes, U256, Address, U512};
use rlp::*;
use evm;
use trace::{VMTrace, FlatTrace};
use types::log_entry::LogEntry;
use types::state_diff::StateDiff;
use std::fmt;
#[derive(Debug, PartialEq, Clone)]
#[cfg_attr(feature = "ipc", binary)]
pub enum CallType {
None,
Call,
CallCode,
DelegateCall,
}
impl Encodable for CallType {
fn rlp_append(&self, s: &mut RlpStream) {
let v = match *self {
CallType::None => 0u32,
CallType::Call => 1,
CallType::CallCode => 2,
CallType::DelegateCall => 3,
};
s.append(&v);
}
}
impl Decodable for CallType {
fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
decoder.as_rlp().as_val().and_then(|v| Ok(match v {
0u32 => CallType::None,
1 => CallType::Call,
2 => CallType::CallCode,
3 => CallType::DelegateCall,
_ => return Err(DecoderError::Custom("Invalid value of CallType item")),
}))
}
}
#[derive(Debug, PartialEq, Clone)]
#[cfg_attr(feature = "ipc", binary)]
pub struct Executed {
pub exception: Option<evm::Error>,
pub gas: U256,
pub gas_used: U256,
pub refunded: U256,
pub cumulative_gas_used: U256,
pub logs: Vec<LogEntry>,
pub contracts_created: Vec<Address>,
pub output: Bytes,
pub trace: Vec<FlatTrace>,
pub vm_trace: Option<VMTrace>,
pub state_diff: Option<StateDiff>,
}
#[derive(PartialEq, Debug, Clone)]
#[cfg_attr(feature = "ipc", binary)]
pub enum ExecutionError {
NotEnoughBaseGas {
required: U256,
got: U256
},
BlockGasLimitReached {
gas_limit: U256,
gas_used: U256,
gas: U256
},
InvalidNonce {
expected: U256,
got: U256
},
NotEnoughCash {
required: U512,
got: U512
},
Internal,
TransactionMalformed(String),
}
impl fmt::Display for ExecutionError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::ExecutionError::*;
let msg = match *self {
NotEnoughBaseGas { required, got } =>
format!("Not enough base gas. {} is required, but only {} paid", required, got),
BlockGasLimitReached { gas_limit, gas_used, gas } =>
format!("Block gas limit reached. The limit is {}, {} has \
already been used, and {} more is required", gas_limit, gas_used, gas),
InvalidNonce { expected, got } =>
format!("Invalid transaction nonce: expected {}, found {}", expected, got),
NotEnoughCash { required, got } =>
format!("Cost of transaction exceeds sender balance. {} is required \
but the sender only has {}", required, got),
Internal => "Internal evm error".into(),
TransactionMalformed(ref err) => format!("Malformed transaction: {}", err),
};
f.write_fmt(format_args!("Transaction execution error ({}).", msg))
}
}
#[derive(PartialEq, Debug, Clone)]
#[cfg_attr(feature = "ipc", binary)]
pub enum CallError {
TransactionNotFound,
StatePruned,
Exceptional,
Execution(ExecutionError),
}
impl From<ExecutionError> for CallError {
fn from(error: ExecutionError) -> Self {
CallError::Execution(error)
}
}
impl fmt::Display for CallError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::CallError::*;
let msg = match *self {
TransactionNotFound => "Transaction couldn't be found in the chain".into(),
StatePruned => "Couldn't find the transaction block's state in the chain".into(),
Exceptional => "An exception happened in the execution".into(),
Execution(ref e) => format!("{}", e),
};
f.write_fmt(format_args!("Transaction execution error ({}).", msg))
}
}
pub type ExecutionResult = Result<Executed, ExecutionError>;
#[test]
fn should_encode_and_decode_call_type() {
use rlp;
let original = CallType::Call;
let encoded = rlp::encode(&original);
let decoded = rlp::decode(&encoded);
assert_eq!(original, decoded);
}