91 lines
2.3 KiB
Rust
91 lines
2.3 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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//! EVM action types.
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use rlp::{Encodable, Decodable, DecoderError, RlpStream, Rlp};
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/// The type of the instruction.
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#[derive(Debug, PartialEq, Clone)]
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pub enum ActionType {
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/// CREATE.
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Create,
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/// CALL.
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Call,
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/// CALLCODE.
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CallCode,
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/// DELEGATECALL.
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DelegateCall,
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/// STATICCALL.
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StaticCall,
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/// CREATE2.
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Create2
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}
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impl Encodable for ActionType {
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fn rlp_append(&self, s: &mut RlpStream) {
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let v = match *self {
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ActionType::Create => 0u32,
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ActionType::Call => 1,
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ActionType::CallCode => 2,
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ActionType::DelegateCall => 3,
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ActionType::StaticCall => 4,
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ActionType::Create2 => 5,
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};
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Encodable::rlp_append(&v, s);
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}
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}
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impl Decodable for ActionType {
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fn decode(rlp: &Rlp) -> Result<Self, DecoderError> {
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rlp.as_val().and_then(|v| Ok(match v {
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0u32 => ActionType::Create,
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1 => ActionType::Call,
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2 => ActionType::CallCode,
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3 => ActionType::DelegateCall,
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4 => ActionType::StaticCall,
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5 => ActionType::Create2,
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_ => return Err(DecoderError::Custom("Invalid value of ActionType item")),
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}))
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}
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}
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#[cfg(test)]
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mod tests {
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use rlp::*;
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use super::ActionType;
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#[test]
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fn encode_call_type() {
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let ct = ActionType::Call;
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let mut s = RlpStream::new_list(2);
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s.append(&ct);
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assert!(!s.is_finished(), "List shouldn't finished yet");
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s.append(&ct);
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assert!(s.is_finished(), "List should be finished now");
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s.out();
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}
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#[test]
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fn should_encode_and_decode_call_type() {
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let original = ActionType::Call;
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let encoded = encode(&original);
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let decoded = decode(&encoded).expect("failure decoding ActionType");
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assert_eq!(original, decoded);
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}
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}
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