cardano_serialization_lib/serialization/
fixed_tx.rs

1use crate::serialization::utils::deserilized_with_orig_bytes;
2use crate::*;
3
4impl cbor_event::se::Serialize for FixedTransaction {
5    fn serialize<'se, W: Write>(
6        &self,
7        serializer: &'se mut Serializer<W>,
8    ) -> cbor_event::Result<&'se mut Serializer<W>> {
9        serializer.write_array(cbor_event::Len::Len(4))?;
10        serializer.write_raw_bytes(&self.body_bytes_ref())?;
11        self.witnesses_set_ref().serialize(serializer)?;
12        serializer.write_special(CBORSpecial::Bool(self.is_valid()))?;
13        match &self.auxiliary_bytes_ref() {
14            Some(auxiliary_bytes) => serializer.write_raw_bytes(auxiliary_bytes)?,
15            None => serializer.write_special(CBORSpecial::Null)?,
16        };
17        Ok(serializer)
18    }
19}
20
21impl Deserialize for FixedTransaction {
22    fn deserialize<R: BufRead + Seek>(raw: &mut Deserializer<R>) -> Result<Self, DeserializeError> {
23        (|| -> Result<_, DeserializeError> {
24            let len = raw.array()?;
25            let ret = Self::deserialize_as_embedded_group(raw, len);
26            match len {
27                cbor_event::Len::Len(_) =>
28                /* TODO: check finite len somewhere */
29                {
30                    ()
31                }
32                cbor_event::Len::Indefinite => match raw.special()? {
33                    CBORSpecial::Break =>
34                    /* it's ok */
35                    {
36                        ()
37                    }
38                    _ => return Err(DeserializeFailure::EndingBreakMissing.into()),
39                },
40            }
41            ret
42        })()
43        .map_err(|e| e.annotate("Transaction"))
44    }
45}
46
47impl DeserializeEmbeddedGroup for FixedTransaction {
48    fn deserialize_as_embedded_group<R: BufRead + Seek>(
49        raw: &mut Deserializer<R>,
50        _: cbor_event::Len,
51    ) -> Result<Self, DeserializeError> {
52        let (body, body_bytes) =
53            deserilized_with_orig_bytes(raw, |raw| TransactionBody::deserialize(raw))
54                .map_err(|e| e.annotate("body"))?;
55        let witness_set =
56            FixedTxWitnessesSet::deserialize(raw).map_err(|e| e.annotate("witness_set"))?;
57        let mut checked_auxiliary_data = false;
58        let mut auxiliary_data = None;
59        let mut auxiliary_bytes = None;
60        let is_valid = (|| -> Result<_, DeserializeError> {
61            match raw.cbor_type()? == CBORType::Special {
62                true => {
63                    // if it's special it can be either a bool or null. if it's null, then it's empty auxiliary data, otherwise not a valid encoding
64                    let special = raw.special()?;
65                    if let CBORSpecial::Bool(b) = special {
66                        return Ok(b);
67                    } else if special == CBORSpecial::Null {
68                        checked_auxiliary_data = true;
69                        return Ok(true);
70                    } else {
71                        return Err(DeserializeFailure::ExpectedBool.into());
72                    }
73                }
74                false => {
75                    let (auxiliary_data_deser, auxiliary_bytes_deser) =
76                        deserilized_with_orig_bytes(raw, |raw| AuxiliaryData::deserialize(raw))
77                            .map_err(|e| e.annotate("auxiliary_data"))?;
78                    auxiliary_data = Some(auxiliary_data_deser);
79                    auxiliary_bytes = Some(auxiliary_bytes_deser);
80                    // if no special symbol was detected, it must have auxiliary data
81                    checked_auxiliary_data = true;
82                    return Ok(true);
83                }
84            }
85        })()
86        .map_err(|e| e.annotate("is_valid"))?;
87        if !checked_auxiliary_data {
88            // this branch is reached, if the 3rd argument was a bool. then it simply follows the rules for checking auxiliary data
89            (auxiliary_data, auxiliary_bytes) = (|| -> Result<_, DeserializeError> {
90                Ok(match raw.cbor_type()? != CBORType::Special {
91                    true => {
92                        let (auxiliary_data_deser, auxiliary_bytes_deser) =
93                            deserilized_with_orig_bytes(raw, |raw| {
94                                AuxiliaryData::deserialize(raw)
95                            })?;
96                        (Some(auxiliary_data_deser), Some(auxiliary_bytes_deser))
97                    }
98                    false => {
99                        if raw.special()? != CBORSpecial::Null {
100                            return Err(DeserializeFailure::ExpectedNull.into());
101                        }
102                        (None, None)
103                    }
104                })
105            })()
106            .map_err(|e| e.annotate("auxiliary_data"))?;
107        }
108        FixedTransaction::new_with_original_bytes(
109            body,
110            body_bytes,
111            witness_set,
112            is_valid,
113            auxiliary_data,
114            auxiliary_bytes,
115        )
116        .map_err(|_| {
117            DeserializeError::new(
118                "FixedTransaction",
119                DeserializeFailure::CustomError("Failed to create FixedTransaction. \
120                Smth wrong with FixedTransaction::new_with_original_bytes()".to_string()),
121            )
122        })
123    }
124}
cardano_serialization_lib/serialization/fixed_tx.rs

cardano_serialization_lib/serialization/
fixed_tx.rs
