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feat: 1% slippage check in quickstart #156

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merged 1 commit into from
Feb 27, 2025
Merged

feat: 1% slippage check in quickstart #156

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12 changes: 8 additions & 4 deletions examples/quickstart/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -163,7 +163,7 @@ async fn main() {

while let Some(message) = protocol_stream.next().await {
let message = message.expect("Could not receive message");
let best_pool = get_best_swap(
let best_swap = get_best_swap(
message,
&mut pairs,
amount_in.clone(),
Expand All @@ -172,7 +172,7 @@ async fn main() {
&mut amounts_out,
);

if let Some(best_pool) = best_pool {
if let Some((best_pool, expected_amount)) = best_swap {
let component = pairs
.get(&best_pool)
.expect("Best pool not found")
Expand All @@ -185,6 +185,7 @@ async fn main() {
buy_token.clone(),
amount_in.clone(),
Bytes::from(wallet.address().to_vec()),
expected_amount,
);

if cli.swapper_pk == FAKE_PK {
Expand Down Expand Up @@ -307,7 +308,7 @@ fn get_best_swap(
sell_token: Token,
buy_token: Token,
amounts_out: &mut HashMap<String, BigUint>,
) -> Option<String> {
) -> Option<(String, BigUint)> {
println!("==================== Received block {:?} ====================", message.block_number);
for (id, comp) in message.new_pairs.iter() {
pairs
Expand Down Expand Up @@ -355,7 +356,7 @@ fn get_best_swap(
"swap: {:?} {:} -> {:?} {:}",
amount_in, sell_token.symbol, amount_out, buy_token.symbol
);
Some(key.to_string())
Some((key.to_string(), amount_out.clone()))
} else {
println!("There aren't pools with the tokens we are looking for");
None
Expand All @@ -369,6 +370,7 @@ fn encode(
buy_token: Token,
sell_amount: BigUint,
user_address: Bytes,
expected_amount: BigUint,
) -> Transaction {
// Prepare data to encode. First we need to create a swap object
let simple_swap = Swap::new(
Expand All @@ -387,6 +389,8 @@ fn encode(
given_token: sell_token.address,
given_amount: sell_amount,
checked_token: buy_token.address,
slippage: Some(0.01), // 1% slippage
expected_amount: Some(expected_amount),
exact_out: false, // it's an exact in solution
checked_amount: None, // the amount out will not be checked in execution
swaps: vec![simple_swap],
Expand Down