69 lines
2.1 KiB
Rust
69 lines
2.1 KiB
Rust
//! Serialization rules specified in [RFC-001#Serialize-Deserialize]
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//!
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//! We automatically serialize and deserialize using serde derivations where possible.
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//! Sometimes we need to implement ourselves, this file holds that code.
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//!
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//! [RFC-001#Serialize-Deserialize]: https://github.com/ZcashFoundation/redjubjub/blob/main/rfcs/0001-messages.md#serializationdeserialization
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use serde::ser::{Serialize, Serializer};
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use serde::de::{self, Deserialize, Deserializer, Visitor};
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use super::constants::{
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AGGREGATOR_PARTICIPANT_ID, DEALER_PARTICIPANT_ID, MAX_SIGNER_PARTICIPANT_ID,
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};
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use super::*;
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use std::fmt;
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impl Serialize for ParticipantId {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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match *self {
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ParticipantId::Signer(id) => {
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assert!(id <= MAX_SIGNER_PARTICIPANT_ID);
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serializer.serialize_u16(id)
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}
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ParticipantId::Dealer => serializer.serialize_u16(DEALER_PARTICIPANT_ID),
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ParticipantId::Aggregator => serializer.serialize_u16(AGGREGATOR_PARTICIPANT_ID),
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}
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}
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}
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struct ParticipantIdVisitor;
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impl<'de> Visitor<'de> for ParticipantIdVisitor {
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type Value = ParticipantId;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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formatter.write_str(
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format!("an integer between {} and {}", std::u16::MIN, std::u16::MAX).as_str(),
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)
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}
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fn visit_u16<E>(self, value: u16) -> Result<Self::Value, E>
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where
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E: de::Error,
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{
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// Note: deserialization can't fail, because all values are valid.
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if value == DEALER_PARTICIPANT_ID {
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Ok(ParticipantId::Dealer)
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} else if value == AGGREGATOR_PARTICIPANT_ID {
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Ok(ParticipantId::Aggregator)
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} else {
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Ok(ParticipantId::Signer(value))
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}
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}
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}
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impl<'de> Deserialize<'de> for ParticipantId {
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fn deserialize<D>(deserializer: D) -> Result<ParticipantId, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_u16(ParticipantIdVisitor)
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}
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}
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