pallas/pallas-localstate/src/codec.rs
2021-11-28 17:36:39 -03:00

117 lines
3.4 KiB
Rust

use super::*;
use pallas_machines::*;
impl EncodePayload for AcquireFailure {
fn encode_payload(&self, e: &mut PayloadEncoder) -> Result<(), Box<dyn std::error::Error>> {
let code = match self {
AcquireFailure::PointTooOld => 0,
AcquireFailure::PointNotInChain => 1,
};
e.u16(code)?;
Ok(())
}
}
impl DecodePayload for AcquireFailure {
fn decode_payload(d: &mut PayloadDecoder) -> Result<Self, Box<dyn std::error::Error>> {
let code = d.u16()?;
match code {
0 => Ok(AcquireFailure::PointTooOld),
1 => Ok(AcquireFailure::PointNotInChain),
_ => Err(Box::new(CodecError::UnexpectedCbor("can't infer acquire failure from variant id"))),
}
}
}
impl<Q: Query> EncodePayload for Message<Q> {
fn encode_payload(&self, e: &mut PayloadEncoder) -> Result<(), Box<dyn std::error::Error>> {
match self {
Message::Acquire(Some(point)) => {
e.array(2)?.u16(0)?;
e.encode_payload(point)?;
Ok(())
}
Message::Acquire(None) => {
e.array(1)?.u16(8)?;
Ok(())
}
Message::Acquired => {
e.array(1)?.u16(1)?;
Ok(())
}
Message::Failure(failure) => {
e.array(2)?.u16(2)?;
e.encode_payload(failure)?;
Ok(())
}
Message::Query(query) => {
e.array(2)?.u16(3)?;
e.array(1)?;
e.encode_payload(query)?;
Ok(())
}
Message::Result(result) => {
e.array(2)?.u16(4)?;
e.array(1)?;
e.encode_payload(result)?;
Ok(())
}
Message::ReAcquire(Some(point)) => {
e.array(2)?.u16(6)?;
e.encode_payload(point)?;
Ok(())
}
Message::ReAcquire(None) => {
e.array(1)?.u16(9)?;
Ok(())
}
Message::Release => {
e.array(1)?.u16(5)?;
Ok(())
}
Message::Done => {
e.array(1)?.u16(7)?;
Ok(())
}
}
}
}
impl<Q: Query> DecodePayload for Message<Q> {
fn decode_payload(d: &mut PayloadDecoder) -> Result<Self, Box<dyn std::error::Error>> {
d.array()?;
let label = d.u16()?;
match label {
0 => {
let point = d.decode_payload()?;
Ok(Message::Acquire(Some(point)))
}
8 => Ok(Message::Acquire(None)),
1 => Ok(Message::Acquired),
2 => {
let failure = d.decode_payload()?;
Ok(Message::Failure(failure))
}
3 => {
let query = d.decode_payload()?;
Ok(Message::Query(query))
}
4 => {
let response = d.decode_payload()?;
Ok(Message::Result(response))
}
5 => Ok(Message::Release),
6 => {
let point = d.decode_payload()?;
Ok(Message::ReAcquire(point))
}
9 => Ok(Message::ReAcquire(None)),
7 => Ok(Message::Done),
x => Err(Box::new(CodecError::BadLabel(x))),
}
}
}