89 lines
2.0 KiB
Rust
89 lines
2.0 KiB
Rust
use util::*;
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pub enum Action {
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Create,
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Call(Address),
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}
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/// A set of information describing an externally-originating message call
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/// or contract creation operation.
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pub struct Transaction {
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pub nonce: U256,
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pub gas_price: U256,
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pub gas: U256,
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pub action: Action,
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pub value: U256,
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pub data: Bytes,
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hash: RefCell<Option<H256>>, //TODO: make this private
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}
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impl RlpStandard for Transaction {
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fn rlp_append(&self, s: &mut RlpStream) {
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s.append_list(6);
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s.append(&self.nonce);
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s.append(&self.gas_price);
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s.append(&self.gas);
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match self.action {
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Action::Create => s.append_empty_data(),
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Action::Call(ref to) => s.append(to),
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};
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s.append(&self.value);
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s.append(&self.data);
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}
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}
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impl Transaction {
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/// Get the hash of this header (sha3 of the RLP).
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pub fn hash(&self) -> H256 {
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let mut hash = self.hash.borrow_mut();
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match &mut *hash {
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&mut Some(ref h) => h.clone(),
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hash @ &mut None => {
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*hash = Some(self.rlp_sha3());
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hash.as_ref().unwrap().clone()
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}
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}
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}
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/// Note that some fields have changed. Resets the memoised hash.
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pub fn note_dirty(&self) {
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*self.hash.borrow_mut() = None;
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}
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/// Returns transaction type.
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pub fn action(&self) -> &Action { &self.action }
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/// Returns transaction sender.
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pub fn sender(&self) -> Address { Address::new() }
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}
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impl Decodable for Action {
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fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
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let rlp = decoder.as_rlp();
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if rlp.is_empty() {
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Ok(Action::Create)
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} else {
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Ok(Action::Call(try!(rlp.as_val())))
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}
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}
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}
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impl Decodable for Transaction {
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fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
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let d = try!(decoder.as_list());
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let transaction = Transaction {
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nonce: try!(Decodable::decode(&d[0])),
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gas_price: try!(Decodable::decode(&d[1])),
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gas: try!(Decodable::decode(&d[2])),
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action: try!(Decodable::decode(&d[3])),
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value: try!(Decodable::decode(&d[4])),
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data: try!(Decodable::decode(&d[5])),
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hash: RefCell::new(None)
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};
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Ok(transaction)
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}
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}
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