diff --git a/src/encoding/evm/swap_encoder/encoders.rs b/src/encoding/evm/swap_encoder/encoders.rs index 3b6ff9a..4eee678 100644 --- a/src/encoding/evm/swap_encoder/encoders.rs +++ b/src/encoding/evm/swap_encoder/encoders.rs @@ -70,6 +70,84 @@ impl SwapEncoder for UniswapV2SwapEncoder { } } +pub struct UniswapV3SwapEncoder { + executor_address: String, +} + +impl UniswapV3SwapEncoder { + fn get_zero_to_one(sell_token_address: Address, buy_token_address: Address) -> bool { + sell_token_address < buy_token_address + } +} + +impl SwapEncoder for UniswapV3SwapEncoder { + fn new(executor_address: String) -> Self { + Self { executor_address } + } + + fn encode_swap( + &self, + swap: Swap, + encoding_context: EncodingContext, + ) -> Result, EncodingError> { + let token_in_address = bytes_to_address(&swap.token_in)?; + let token_out_address = bytes_to_address(&swap.token_out)?; + + let zero_for_one = Self::get_zero_to_one(token_in_address, token_out_address); + let component_id = Bytes::from( + decode( + swap.component + .id + .trim_start_matches("0x"), + ) + .map_err(|_| { + EncodingError::FatalError(format!( + "Failed to parse component id for Uniswap v3: {}", + swap.component.id + )) + })?, + ); + let mut pool_fee_bytes = swap + .component + .static_attributes + .get("pool_fee") + .ok_or_else(|| { + EncodingError::FatalError( + "Pool fee not found in Uniswap v3 static attributes".to_string(), + ) + })? + .as_ref() + .to_vec(); + + // Reverse to get be bytes, since this is encoded as le bytes + pool_fee_bytes.reverse(); + + let pool_fee_u24: [u8; 3] = pool_fee_bytes[pool_fee_bytes.len() - 3..] + .try_into() + .map_err(|_| { + EncodingError::FatalError( + "Pool fee static attribute must be at least 3 bytes".to_string(), + ) + })?; + + let args = ( + token_in_address, + token_out_address, + pool_fee_u24, + bytes_to_address(&encoding_context.receiver)?, + bytes_to_address(&component_id)?, + zero_for_one, + encoding_context.exact_out, + ); + + Ok(args.abi_encode_packed()) + } + + fn executor_address(&self) -> &str { + &self.executor_address + } +} + pub struct BalancerV2SwapEncoder { executor_address: String, vault_address: String, @@ -116,6 +194,8 @@ impl SwapEncoder for BalancerV2SwapEncoder { #[cfg(test)] mod tests { + use std::collections::HashMap; + use alloy::hex::encode; use tycho_core::{dto::ProtocolComponent, Bytes}; @@ -159,6 +239,53 @@ mod tests { )) ); } + #[tokio::test] + async fn test_encode_uniswap_v3() { + let encoded_pool_fee: [u8; 4] = 500u32.to_le_bytes(); + let mut static_attributes: HashMap = HashMap::new(); + static_attributes.insert("pool_fee".into(), Bytes::from(encoded_pool_fee[..3].to_vec())); + + let usv3_pool = ProtocolComponent { + id: String::from("0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640"), + static_attributes, + ..Default::default() + }; + let swap = Swap { + component: usv3_pool, + token_in: Bytes::from("0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"), + token_out: Bytes::from("0x6b175474e89094c44da98b954eedeac495271d0f"), + split: 0f64, + }; + let encoding_context = EncodingContext { + receiver: Bytes::from("0x0000000000000000000000000000000000000001"), + exact_out: false, + router_address: Bytes::zero(20), + }; + let encoder = UniswapV3SwapEncoder::new(String::from("0x")); + let encoded_swap = encoder + .encode_swap(swap, encoding_context) + .unwrap(); + let hex_swap = encode(&encoded_swap); + assert_eq!( + hex_swap, + String::from(concat!( + // in token + "c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2", + // out token + "6b175474e89094c44da98b954eedeac495271d0f", + // fee + "0001f4", + // receiver + "0000000000000000000000000000000000000001", + // pool id + "88e6a0c2ddd26feeb64f039a2c41296fcb3f5640", + // zero for one + "00", + // exact out + "00", + )) + ); + } #[test] fn test_encode_balancer_v2() { @@ -191,7 +318,7 @@ mod tests { "c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2", // token out "6b175474e89094c44da98b954eedeac495271d0f", - // pool id + // pool id "307838386536413063326444443236464545623634463033396132633431323936466342336635363430", // receiver "0000000000000000000000000000000000000001",