89 lines
2.5 KiB
Rust
89 lines
2.5 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
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// This file is part of OpenEthereum.
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// OpenEthereum 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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// OpenEthereum 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 OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! EVM call types.
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use rlp::{Decodable, DecoderError, Encodable, Rlp, RlpStream};
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/// The type of the call-like instruction.
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#[derive(Debug, PartialEq, Clone)]
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pub enum CallType {
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/// Not a CALL.
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None,
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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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}
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impl Encodable for CallType {
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fn rlp_append(&self, s: &mut RlpStream) {
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let v = match *self {
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CallType::None => 0u32,
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CallType::Call => 1,
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CallType::CallCode => 2,
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CallType::DelegateCall => 3,
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CallType::StaticCall => 4,
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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 CallType {
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fn decode(rlp: &Rlp) -> Result<Self, DecoderError> {
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rlp.as_val().and_then(|v| {
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Ok(match v {
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0u32 => CallType::None,
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1 => CallType::Call,
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2 => CallType::CallCode,
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3 => CallType::DelegateCall,
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4 => CallType::StaticCall,
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_ => return Err(DecoderError::Custom("Invalid value of CallType item")),
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})
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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 super::CallType;
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use rlp::*;
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#[test]
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fn encode_call_type() {
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let ct = CallType::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 = CallType::Call;
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let encoded = encode(&original);
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let decoded = decode(&encoded).expect("failure decoding CallType");
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assert_eq!(original, decoded);
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}
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}
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