tycho_simulation/evm/protocol/uniswap_v2/
decoder.rs

1use std::collections::HashMap;
2
3use tycho_client::feed::{synchronizer::ComponentWithState, BlockHeader};
4use tycho_common::{models::token::Token, Bytes};
5
6use crate::{
7    evm::protocol::{cpmm::protocol::cpmm_try_from_with_header, uniswap_v2::state::UniswapV2State},
8    protocol::{
9        errors::InvalidSnapshotError,
10        models::{DecoderContext, TryFromWithBlock},
11    },
12};
13
14impl TryFromWithBlock<ComponentWithState, BlockHeader> for UniswapV2State {
15    type Error = InvalidSnapshotError;
16
17    /// Decodes a `ComponentWithState` into a `UniswapV2State`. Errors with a `InvalidSnapshotError`
18    /// if either reserve0 or reserve1 attributes are missing.
19    async fn try_from_with_header(
20        snapshot: ComponentWithState,
21        _block: BlockHeader,
22        _account_balances: &HashMap<Bytes, HashMap<Bytes, Bytes>>,
23        _all_tokens: &HashMap<Bytes, Token>,
24        _decoder_context: &DecoderContext,
25    ) -> Result<Self, Self::Error> {
26        let (reserve0, reserve1) = cpmm_try_from_with_header(snapshot)?;
27        Ok(Self::new(reserve0, reserve1))
28    }
29}
30
31#[cfg(test)]
32mod tests {
33    use std::collections::HashMap;
34
35    use alloy::primitives::U256;
36    use rstest::rstest;
37    use tycho_client::feed::synchronizer::ComponentWithState;
38    use tycho_common::{dto::ResponseProtocolState, Bytes};
39
40    use super::super::state::UniswapV2State;
41    use crate::{
42        evm::protocol::test_utils::try_decode_snapshot_with_defaults,
43        protocol::errors::InvalidSnapshotError,
44    };
45
46    #[tokio::test]
47    async fn test_usv2_try_from() {
48        let snapshot = ComponentWithState {
49            state: ResponseProtocolState {
50                component_id: "State1".to_owned(),
51                attributes: HashMap::from([
52                    ("reserve0".to_string(), Bytes::from(vec![0; 32])),
53                    ("reserve1".to_string(), Bytes::from(vec![0; 32])),
54                ]),
55                balances: HashMap::new(),
56            },
57            component: Default::default(),
58            component_tvl: None,
59            entrypoints: Vec::new(),
60        };
61
62        let result = try_decode_snapshot_with_defaults::<UniswapV2State>(snapshot).await;
63
64        assert!(result.is_ok());
65        assert_eq!(result.unwrap(), UniswapV2State::new(U256::from(0u64), U256::from(0u64)));
66    }
67
68    #[tokio::test]
69    #[rstest]
70    #[case::missing_reserve0("reserve0")]
71    #[case::missing_reserve1("reserve1")]
72    async fn test_usv2_try_from_missing_attribute(#[case] missing_attribute: &str) {
73        let mut attributes = HashMap::from([
74            ("reserve0".to_string(), Bytes::from(vec![0; 32])),
75            ("reserve1".to_string(), Bytes::from(vec![0; 32])),
76        ]);
77        attributes.remove(missing_attribute);
78
79        let snapshot = ComponentWithState {
80            state: ResponseProtocolState {
81                component_id: "State1".to_owned(),
82                attributes,
83                balances: HashMap::new(),
84            },
85            component: Default::default(),
86            component_tvl: None,
87            entrypoints: Vec::new(),
88        };
89
90        let result = try_decode_snapshot_with_defaults::<UniswapV2State>(snapshot).await;
91
92        assert!(result.is_err());
93        assert!(matches!(
94            result.unwrap_err(),
95            InvalidSnapshotError::MissingAttribute(ref x) if x == missing_attribute
96        ));
97    }
98}
tycho_simulation/evm/protocol/uniswap_v2/decoder.rs

tycho_simulation/evm/protocol/uniswap_v2/
decoder.rs
