reth_codecs/alloy/transaction/
txtype.rs

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1//! Compact implementation for [`TxType`]
2
3use crate::txtype::{COMPACT_EXTENDED_IDENTIFIER_FLAG, COMPACT_IDENTIFIER_EIP1559, COMPACT_IDENTIFIER_EIP2930, COMPACT_IDENTIFIER_LEGACY};
4use alloy_consensus::constants::{EIP4844_TX_TYPE_ID, EIP7702_TX_TYPE_ID};
5use alloy_consensus::TxType;
6
7impl crate::Compact for TxType {
8    fn to_compact<B>(&self, buf: &mut B) -> usize
9    where
10        B: bytes::BufMut + AsMut<[u8]>,
11    {
12        use crate::txtype::*;
13
14        match self {
15            Self::Legacy => COMPACT_IDENTIFIER_LEGACY,
16            Self::Eip2930 => COMPACT_IDENTIFIER_EIP2930,
17            Self::Eip1559 => COMPACT_IDENTIFIER_EIP1559,
18            Self::Eip4844 => {
19                buf.put_u8(EIP4844_TX_TYPE_ID);
20                COMPACT_EXTENDED_IDENTIFIER_FLAG
21            }
22            Self::Eip7702 => {
23                buf.put_u8(EIP7702_TX_TYPE_ID);
24                COMPACT_EXTENDED_IDENTIFIER_FLAG
25            }
26        }
27    }
28
29    // For backwards compatibility purposes only 2 bits of the type are encoded in the identifier
30    // parameter. In the case of a [`COMPACT_EXTENDED_IDENTIFIER_FLAG`], the full transaction type
31    // is read from the buffer as a single byte.
32    fn from_compact(mut buf: &[u8], identifier: usize) -> (Self, &[u8]) {
33        use bytes::Buf;
34        (
35            match identifier {
36                COMPACT_IDENTIFIER_LEGACY => Self::Legacy,
37                COMPACT_IDENTIFIER_EIP2930 => Self::Eip2930,
38                COMPACT_IDENTIFIER_EIP1559 => Self::Eip1559,
39                COMPACT_EXTENDED_IDENTIFIER_FLAG => {
40                    let extended_identifier = buf.get_u8();
41                    match extended_identifier {
42                        EIP4844_TX_TYPE_ID => Self::Eip4844,
43                        EIP7702_TX_TYPE_ID => Self::Eip7702,
44                        _ => panic!("Unsupported TxType identifier: {extended_identifier}"),
45                    }
46                }
47                _ => panic!("Unknown identifier for TxType: {identifier}"),
48            },
49            buf,
50        )
51    }
52}
53
54#[cfg(test)]
55mod tests {
56    use super::*;
57    use rstest::rstest;
58    
59    use alloy_consensus::constants::{EIP4844_TX_TYPE_ID, EIP7702_TX_TYPE_ID};
60    use crate::Compact;
61
62
63    #[rstest]
64    #[case(TxType::Legacy, COMPACT_IDENTIFIER_LEGACY, vec![])]
65    #[case(TxType::Eip2930, COMPACT_IDENTIFIER_EIP2930, vec![])]
66    #[case(TxType::Eip1559, COMPACT_IDENTIFIER_EIP1559, vec![])]
67    #[case(TxType::Eip4844, COMPACT_EXTENDED_IDENTIFIER_FLAG, vec![EIP4844_TX_TYPE_ID])]
68    #[case(TxType::Eip7702, COMPACT_EXTENDED_IDENTIFIER_FLAG, vec![EIP7702_TX_TYPE_ID])]
69    fn test_txtype_to_compact(
70        #[case] tx_type: TxType,
71        #[case] expected_identifier: usize,
72        #[case] expected_buf: Vec<u8>,
73    ) {
74        let mut buf = vec![];
75        let identifier = tx_type.to_compact(&mut buf);
76
77        assert_eq!(identifier, expected_identifier, "Unexpected identifier for TxType {tx_type:?}",);
78        assert_eq!(buf, expected_buf, "Unexpected buffer for TxType {tx_type:?}",);
79    }
80
81    #[rstest]
82    #[case(TxType::Legacy, COMPACT_IDENTIFIER_LEGACY, vec![])]
83    #[case(TxType::Eip2930, COMPACT_IDENTIFIER_EIP2930, vec![])]
84    #[case(TxType::Eip1559, COMPACT_IDENTIFIER_EIP1559, vec![])]
85    #[case(TxType::Eip4844, COMPACT_EXTENDED_IDENTIFIER_FLAG, vec![EIP4844_TX_TYPE_ID])]
86    #[case(TxType::Eip7702, COMPACT_EXTENDED_IDENTIFIER_FLAG, vec![EIP7702_TX_TYPE_ID])]
87    fn test_txtype_from_compact(
88        #[case] expected_type: TxType,
89        #[case] identifier: usize,
90        #[case] buf: Vec<u8>,
91    ) {
92        let (actual_type, remaining_buf) = TxType::from_compact(&buf, identifier);
93
94        assert_eq!(actual_type, expected_type, "Unexpected TxType for identifier {identifier}");
95        assert!(remaining_buf.is_empty(), "Buffer not fully consumed for identifier {identifier}");
96    }
97}
reth_codecs/alloy/transaction/txtype.rs

reth_codecs/alloy/transaction/
txtype.rs
