90 lines
2.0 KiB
Rust
90 lines
2.0 KiB
Rust
use util::*;
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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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nonce: U256,
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gas_price: U256,
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gas: U256,
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to: Option<Address>,
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value: U256,
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data: Bytes,
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hash: RefCell<Option<H256>>, //TODO: make this private
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}
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impl Transaction {
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/// Is this transaction meant to create a contract?
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pub fn is_contract_creation(&self) -> bool {
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self.to.is_none()
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}
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/// Is this transaction meant to send a message?
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pub fn is_message_call(&self) -> bool {
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!self.is_contract_creation()
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}
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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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s.append(&self.to);
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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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}
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impl Encodable for Transaction {
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fn encode<E>(&self, encoder: &mut E) where E: Encoder {
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encoder.emit_list(| e | {
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self.nonce.encode(e);
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self.gas_price.encode(e);
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self.gas.encode(e);
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self.to.encode(e);
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self.value.encode(e);
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self.data.encode(e);
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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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to: 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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