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fix: Uniswap v3 pool fee is big endian, not little endian

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--- don't change below this line ---
ENG-4088 Took 18 minutes


Took 17 seconds
This commit is contained in:
Diana Carvalho
2025-02-07 11:02:59 +00:00
parent bef4740a1d
commit 0c9050cf79
1 changed files with 11 additions and 12 deletions
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23
src/encoding/evm/swap_encoder/swap_encoders.rs
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@@ -104,7 +104,7 @@ impl SwapEncoder for UniswapV3SwapEncoder {
let zero_to_one = Self::get_zero_to_one(token_in_address, token_out_address);
let component_id = Address::from_str(&swap.component.id)
.map_err(|_| EncodingError::FatalError("Invalid USV3 component id".to_string()))?;
let mut pool_fee_bytes = swap
let pool_fee_bytes = swap
.component
.static_attributes
.get("fee")
@@ -113,19 +113,16 @@ impl SwapEncoder for UniswapV3SwapEncoder {
"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();
// this is necessary to pad on the left with zeros if the fee is less than 3 bytes
let mut padded_fee_bytes = [0u8; 3];
let start = 3 - pool_fee_bytes.len();
padded_fee_bytes[start..].copy_from_slice(&pool_fee_bytes);
let pool_fee_u24: [u8; 3] = pool_fee_bytes[pool_fee_bytes.len() - 3..]
let pool_fee_u24: [u8; 3] = padded_fee_bytes[(padded_fee_bytes.len() - 3)..]
.try_into()
.map_err(|_| {
EncodingError::FatalError(
"Pool fee static attribute must be at least 3 bytes".to_string(),
)
})?;
.map_err(|_| EncodingError::FatalError("Failed to extract fee bytes".to_string()))?;
let args = (
token_in_address,
@@ -214,6 +211,7 @@ mod tests {
use std::collections::HashMap;
use alloy::hex::encode;
use num_bigint::BigInt;
use tycho_core::{dto::ProtocolComponent, Bytes};
use super::*;
@@ -257,9 +255,10 @@ mod tests {
}
#[test]
fn test_encode_uniswap_v3() {
let encoded_pool_fee: [u8; 4] = 500u32.to_le_bytes();
let fee = BigInt::from(500);
let encoded_pool_fee = Bytes::from(fee.to_signed_bytes_be());
let mut static_attributes: HashMap<String, Bytes> = HashMap::new();
static_attributes.insert("fee".into(), Bytes::from(encoded_pool_fee[..3].to_vec()));
static_attributes.insert("fee".into(), Bytes::from(encoded_pool_fee.to_vec()));
let usv3_pool = ProtocolComponent {
id: String::from("0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640"),