tycho_simulation/evm/protocol/pancakeswap_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::{
8        cpmm::protocol::cpmm_try_from_with_header, pancakeswap_v2::state::PancakeswapV2State,
9    },
10    protocol::{
11        errors::InvalidSnapshotError,
12        models::{DecoderContext, TryFromWithBlock},
13    },
14};
15
16impl TryFromWithBlock<ComponentWithState, BlockHeader> for PancakeswapV2State {
17    type Error = InvalidSnapshotError;
18
19    /// Decodes a `ComponentWithState` into a `PancakeswapV2State`. Errors with a
20    /// `InvalidSnapshotError` if either reserve0 or reserve1 attributes are missing.
21    async fn try_from_with_header(
22        snapshot: ComponentWithState,
23        _block: BlockHeader,
24        _account_balances: &HashMap<Bytes, HashMap<Bytes, Bytes>>,
25        _all_tokens: &HashMap<Bytes, Token>,
26        _decoder_context: &DecoderContext,
27    ) -> Result<Self, Self::Error> {
28        let (reserve0, reserve1) = cpmm_try_from_with_header(snapshot)?;
29        Ok(Self::new(reserve0, reserve1))
30    }
31}
32
33#[cfg(test)]
34mod tests {
35    use std::collections::HashMap;
36
37    use alloy::primitives::U256;
38    use rstest::rstest;
39    use tycho_client::feed::synchronizer::ComponentWithState;
40    use tycho_common::{dto::ResponseProtocolState, Bytes};
41
42    use super::super::state::PancakeswapV2State;
43    use crate::{
44        evm::protocol::test_utils::try_decode_snapshot_with_defaults,
45        protocol::errors::InvalidSnapshotError,
46    };
47
48    #[tokio::test]
49    async fn test_pancakeswap_v2_try_from() {
50        let snapshot = ComponentWithState {
51            state: ResponseProtocolState {
52                component_id: "State1".to_owned(),
53                attributes: HashMap::from([
54                    ("reserve0".to_string(), Bytes::from(vec![0; 32])),
55                    ("reserve1".to_string(), Bytes::from(vec![0; 32])),
56                ]),
57                balances: HashMap::new(),
58            },
59            component: Default::default(),
60            component_tvl: None,
61            entrypoints: Vec::new(),
62        };
63
64        let result = try_decode_snapshot_with_defaults::<PancakeswapV2State>(snapshot).await;
65
66        assert!(result.is_ok());
67        assert_eq!(result.unwrap(), PancakeswapV2State::new(U256::from(0u64), U256::from(0u64)));
68    }
69
70    #[tokio::test]
71    #[rstest]
72    #[case::missing_reserve0("reserve0")]
73    #[case::missing_reserve1("reserve1")]
74    async fn test_pancakeswap_v2_try_from_missing_attribute(#[case] missing_attribute: &str) {
75        let mut attributes = HashMap::from([
76            ("reserve0".to_string(), Bytes::from(vec![0; 32])),
77            ("reserve1".to_string(), Bytes::from(vec![0; 32])),
78        ]);
79        attributes.remove(missing_attribute);
80
81        let snapshot = ComponentWithState {
82            state: ResponseProtocolState {
83                component_id: "State1".to_owned(),
84                attributes,
85                balances: HashMap::new(),
86            },
87            component: Default::default(),
88            component_tvl: None,
89            entrypoints: Vec::new(),
90        };
91
92        let result = try_decode_snapshot_with_defaults::<PancakeswapV2State>(snapshot).await;
93
94        assert!(result.is_err());
95        assert!(matches!(
96            result.unwrap_err(),
97            InvalidSnapshotError::MissingAttribute(ref x) if x == missing_attribute
98        ));
99    }
100}
tycho_simulation/evm/protocol/pancakeswap_v2/decoder.rs

tycho_simulation/evm/protocol/pancakeswap_v2/
decoder.rs
