diff --git a/crates/autopilot/src/arguments.rs b/crates/autopilot/src/arguments.rs
index 00062dfd94..8ea3903270 100644
--- a/crates/autopilot/src/arguments.rs
+++ b/crates/autopilot/src/arguments.rs
@@ -26,7 +26,7 @@ pub struct Arguments {
     #[clap(
         long,
         env,
-        default_value = "0x26c3801b4840dab317cedfd7aeaf9f45fdd22830"
+        default_value = "0x76aAf674848311C7F21fc691B0b952f016dA49F3"
     )]
     pub ethflow_contract: H160,
 
diff --git a/crates/autopilot/src/database/events.rs b/crates/autopilot/src/database/events.rs
index 9e84e5887a..b009340a89 100644
--- a/crates/autopilot/src/database/events.rs
+++ b/crates/autopilot/src/database/events.rs
@@ -99,7 +99,7 @@ pub fn meta_to_event_index(meta: &EventMetadata) -> EventIndex {
     }
 }
 
-fn bytes_to_order_uid(bytes: &[u8]) -> Result<OrderUid> {
+pub fn bytes_to_order_uid(bytes: &[u8]) -> Result<OrderUid> {
     bytes
         .try_into()
         .context("order_uid has wrong number of bytes")
diff --git a/crates/autopilot/src/database/onchain_order_events.rs b/crates/autopilot/src/database/onchain_order_events.rs
index 4c31c6cb30..3251efdd35 100644
--- a/crates/autopilot/src/database/onchain_order_events.rs
+++ b/crates/autopilot/src/database/onchain_order_events.rs
@@ -1,9 +1,13 @@
 pub mod ethflow_events;
 
-use super::{events::meta_to_event_index, Metrics, Postgres};
+use super::{
+    events::{bytes_to_order_uid, meta_to_event_index},
+    Metrics, Postgres,
+};
 use anyhow::{anyhow, bail, Context, Result};
 use contracts::cowswap_onchain_orders::{
-    event_data::OrderPlacement as ContractOrderPlacement, Event as ContractEvent,
+    event_data::{OrderInvalidation, OrderPlacement as ContractOrderPlacement},
+    Event as ContractEvent,
 };
 use database::{
     byte_array::ByteArray,
@@ -134,11 +138,14 @@ impl<T: Sync + Send + Clone, W: Sync + Send + Clone> EventStoring<ContractEvent>
         range: RangeInclusive<u64>,
     ) -> Result<()> {
         let order_placement_events = events
+            .clone()
             .into_iter()
             .filter(|EthContractEvent { data, .. }| {
                 matches!(data, ContractEvent::OrderPlacement(_))
             })
             .collect();
+        let invalidation_events = get_invalidation_events(events)?;
+        let invalided_order_uids = extract_invalidated_order_uids(invalidation_events)?;
         let (custom_onchain_data, quotes, broadcasted_order_data, orders) = self
             .extract_custom_and_general_order_data(order_placement_events)
             .await?;
@@ -157,6 +164,20 @@ impl<T: Sync + Send + Clone, W: Sync + Send + Clone> EventStoring<ContractEvent>
         .await
         .context("mark_onchain_order_events failed")?;
 
+        database::onchain_invalidations::delete_invalidations(
+            &mut transaction,
+            *range.start() as i64,
+        )
+        .await
+        .context("invalidating_onchain_order_events failed")?;
+
+        database::onchain_invalidations::insert_onchain_invalidations(
+            &mut transaction,
+            invalided_order_uids.as_slice(),
+        )
+        .await
+        .context("insert_onchain_invalidations failed")?;
+
         self.custom_onchain_data_parser
             .append_custom_order_info_to_db(&mut transaction, custom_onchain_data)
             .await
@@ -182,11 +203,14 @@ impl<T: Sync + Send + Clone, W: Sync + Send + Clone> EventStoring<ContractEvent>
 
     async fn append_events(&mut self, events: Vec<EthContractEvent<ContractEvent>>) -> Result<()> {
         let order_placement_events = events
+            .clone()
             .into_iter()
             .filter(|EthContractEvent { data, .. }| {
                 matches!(data, ContractEvent::OrderPlacement(_))
             })
             .collect();
+        let invalidation_events = get_invalidation_events(events)?;
+        let invalided_order_uids = extract_invalidated_order_uids(invalidation_events)?;
         let (custom_order_data, quotes, broadcasted_order_data, orders) = self
             .extract_custom_and_general_order_data(order_placement_events)
             .await?;
@@ -197,6 +221,12 @@ impl<T: Sync + Send + Clone, W: Sync + Send + Clone> EventStoring<ContractEvent>
             .start_timer();
         let mut transaction = self.db.0.begin().await?;
 
+        database::onchain_invalidations::insert_onchain_invalidations(
+            &mut transaction,
+            invalided_order_uids.as_slice(),
+        )
+        .await
+        .context("insert_onchain_invalidations failed")?;
         database::onchain_broadcasted_orders::append(
             &mut transaction,
             broadcasted_order_data.as_slice(),
@@ -294,6 +324,45 @@ impl<T: Send + Sync + Clone, W: Send + Sync> OnchainOrderParser<T, W> {
     }
 }
 
+fn get_invalidation_events(
+    events: Vec<EthContractEvent<ContractEvent>>,
+) -> Result<Vec<(EventIndex, OrderInvalidation)>> {
+    events
+        .into_iter()
+        .filter_map(|EthContractEvent { data, meta }| {
+            let meta = match meta {
+                Some(meta) => meta,
+                None => return Some(Err(anyhow!("invalidation event without metadata"))),
+            };
+            let data = match data {
+                ContractEvent::OrderInvalidation(event) => event,
+                _ => {
+                    return None;
+                }
+            };
+            Some(Ok((meta_to_event_index(&meta), data)))
+        })
+        .collect()
+}
+
+fn extract_invalidated_order_uids(
+    invalidations: Vec<(EventIndex, OrderInvalidation)>,
+) -> Result<Vec<(EventIndex, database::OrderUid)>> {
+    invalidations
+        .into_iter()
+        .map(|(event_index, invalidation)| {
+            Ok((
+                event_index,
+                // The following conversion should not error, as the contract
+                // enforces that the enough bytes are sent
+                // If the error happens anyways, we want to stop indexing and
+                // hence escalate the error
+                bytes_to_order_uid(invalidation.order_uid.0.as_slice())?,
+            ))
+        })
+        .collect()
+}
+
 type GeneralOnchainOrderPlacementData = (
     EventIndex,
     database::orders::Quote,
diff --git a/crates/contracts/artifacts/CoWSwapEthFlow.json b/crates/contracts/artifacts/CoWSwapEthFlow.json
index 9d1b70d560..50effce44f 100644
--- a/crates/contracts/artifacts/CoWSwapEthFlow.json
+++ b/crates/contracts/artifacts/CoWSwapEthFlow.json
@@ -1 +1 @@
-{"abi":[{"inputs":[{"internalType":"contract ICoWSwapSettlement","name":"_cowSwapSettlement","type":"address"},{"internalType":"contract IWrappedNativeToken","name":"_wrappedNativeToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"EthTransferFailed","type":"error"},{"inputs":[],"name":"IncorrectEthAmount","type":"error"},{"inputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"name":"NotAllowedToInvalidateOrder","type":"error"},{"inputs":[],"name":"NotAllowedZeroSellAmount","type":"error"},{"inputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"name":"OrderIsAlreadyOwned","type":"error"},{"inputs":[],"name":"ReceiverMustBeSet","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes","name":"orderUid","type":"bytes"}],"name":"OrderInvalidation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"components":[{"internalType":"contract IERC20","name":"sellToken","type":"address"},{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"bytes32","name":"kind","type":"bytes32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"bytes32","name":"sellTokenBalance","type":"bytes32"},{"internalType":"bytes32","name":"buyTokenBalance","type":"bytes32"}],"indexed":false,"internalType":"struct GPv2Order.Data","name":"order","type":"tuple"},{"components":[{"internalType":"enum ICoWSwapOnchainOrders.OnchainSigningScheme","name":"scheme","type":"uint8"},{"internalType":"bytes","name":"data","type":"bytes"}],"indexed":false,"internalType":"struct ICoWSwapOnchainOrders.OnchainSignature","name":"signature","type":"tuple"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"OrderPlacement","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes","name":"orderUid","type":"bytes"},{"indexed":true,"internalType":"address","name":"refunder","type":"address"}],"name":"OrderRefund","type":"event"},{"inputs":[],"name":"cowSwapSettlement","outputs":[{"internalType":"contract ICoWSwapSettlement","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"int64","name":"quoteId","type":"int64"}],"internalType":"struct EthFlowOrder.Data","name":"order","type":"tuple"}],"name":"createOrder","outputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"int64","name":"quoteId","type":"int64"}],"internalType":"struct EthFlowOrder.Data","name":"order","type":"tuple"}],"name":"invalidateOrder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"int64","name":"quoteId","type":"int64"}],"internalType":"struct EthFlowOrder.Data[]","name":"orderArray","type":"tuple[]"}],"name":"invalidateOrdersIgnoringNotAllowed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"isValidSignature","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"orders","outputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint32","name":"validTo","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"unwrap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"wrap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wrapAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wrappedNativeToken","outputs":[{"internalType":"contract IWrappedNativeToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}],"bytecode":"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\ No newline at end of file
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IWrappedNativeToken","name":"_wrappedNativeToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"EthTransferFailed","type":"error"},{"inputs":[],"name":"IncorrectEthAmount","type":"error"},{"inputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"name":"NotAllowedToInvalidateOrder","type":"error"},{"inputs":[],"name":"NotAllowedZeroSellAmount","type":"error"},{"inputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"name":"OrderIsAlreadyOwned","type":"error"},{"inputs":[],"name":"ReceiverMustBeSet","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes","name":"orderUid","type":"bytes"}],"name":"OrderInvalidation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"components":[{"internalType":"contract IERC20","name":"sellToken","type":"address"},{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"bytes32","name":"kind","type":"bytes32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"bytes32","name":"sellTokenBalance","type":"bytes32"},{"internalType":"bytes32","name":"buyTokenBalance","type":"bytes32"}],"indexed":false,"internalType":"struct GPv2Order.Data","name":"order","type":"tuple"},{"components":[{"internalType":"enum ICoWSwapOnchainOrders.OnchainSigningScheme","name":"scheme","type":"uint8"},{"internalType":"bytes","name":"data","type":"bytes"}],"indexed":false,"internalType":"struct ICoWSwapOnchainOrders.OnchainSignature","name":"signature","type":"tuple"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"OrderPlacement","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes","name":"orderUid","type":"bytes"},{"indexed":true,"internalType":"address","name":"refunder","type":"address"}],"name":"OrderRefund","type":"event"},{"inputs":[],"name":"cowSwapSettlement","outputs":[{"internalType":"contract ICoWSwapSettlement","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"int64","name":"quoteId","type":"int64"}],"internalType":"struct EthFlowOrder.Data","name":"order","type":"tuple"}],"name":"createOrder","outputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"contract 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IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"int64","name":"quoteId","type":"int64"}],"internalType":"struct EthFlowOrder.Data[]","name":"orderArray","type":"tuple[]"}],"name":"invalidateOrdersIgnoringNotAllowed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"orderHash","type":"bytes32"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"isValidSignature","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"orders","outputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint32","name":"validTo","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"unwrap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"wrap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wrapAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wrappedNativeToken","outputs":[{"internalType":"contract IWrappedNativeToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}],"bytecode":"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diff --git a/crates/contracts/artifacts/CoWSwapOnchainOrders.json b/crates/contracts/artifacts/CoWSwapOnchainOrders.json
index e834de9d2c..39359dbe9f 100644
--- a/crates/contracts/artifacts/CoWSwapOnchainOrders.json
+++ b/crates/contracts/artifacts/CoWSwapOnchainOrders.json
@@ -1 +1 @@
-{"abi":[{"inputs":[{"internalType":"address","name":"settlementContractAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes","name":"orderUid","type":"bytes"}],"name":"OrderInvalidation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"components":[{"internalType":"contract IERC20","name":"sellToken","type":"address"},{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"bytes32","name":"kind","type":"bytes32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"bytes32","name":"sellTokenBalance","type":"bytes32"},{"internalType":"bytes32","name":"buyTokenBalance","type":"bytes32"}],"indexed":false,"internalType":"struct GPv2Order.Data","name":"order","type":"tuple"},{"components":[{"internalType":"enum ICoWSwapOnchainOrders.OnchainSigningScheme","name":"scheme","type":"uint8"},{"internalType":"bytes","name":"data","type":"bytes"}],"indexed":false,"internalType":"struct ICoWSwapOnchainOrders.OnchainSignature","name":"signature","type":"tuple"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"OrderPlacement","type":"event"}]}
\ No newline at end of file
+{"abi":[{"inputs":[{"internalType":"address","name":"settlementContractAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes","name":"orderUid","type":"bytes"}],"name":"OrderInvalidation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"components":[{"internalType":"contract IERC20","name":"sellToken","type":"address"},{"internalType":"contract IERC20","name":"buyToken","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"sellAmount","type":"uint256"},{"internalType":"uint256","name":"buyAmount","type":"uint256"},{"internalType":"uint32","name":"validTo","type":"uint32"},{"internalType":"bytes32","name":"appData","type":"bytes32"},{"internalType":"uint256","name":"feeAmount","type":"uint256"},{"internalType":"bytes32","name":"kind","type":"bytes32"},{"internalType":"bool","name":"partiallyFillable","type":"bool"},{"internalType":"bytes32","name":"sellTokenBalance","type":"bytes32"},{"internalType":"bytes32","name":"buyTokenBalance","type":"bytes32"}],"indexed":false,"internalType":"struct GPv2Order.Data","name":"order","type":"tuple"},{"components":[{"internalType":"enum ICoWSwapOnchainOrders.OnchainSigningScheme","name":"scheme","type":"uint8"},{"internalType":"bytes","name":"data","type":"bytes"}],"indexed":false,"internalType":"struct ICoWSwapOnchainOrders.OnchainSignature","name":"signature","type":"tuple"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"OrderPlacement","type":"event"}]}
\ No newline at end of file
diff --git a/crates/contracts/src/bin/vendor.rs b/crates/contracts/src/bin/vendor.rs
index 000c1d545b..f810c27960 100644
--- a/crates/contracts/src/bin/vendor.rs
+++ b/crates/contracts/src/bin/vendor.rs
@@ -131,6 +131,11 @@ fn run() -> Result<()> {
             "balancer-labs/balancer-v2-monorepo/903d34e491a5e9c5d59dabf512c7addf1ccf9bbd/\
             pkg/deployments/tasks/20220609-stable-pool-v2/abi/StablePoolFactory.json",
         )?
+        .github(
+            "CoWSwapOnchainOrders",
+            "cowprotocol/ethflowcontract/0.0.0-rc.2\
+            -artifacts/artifacts/CoWSwapOnchainOrders.sol/CoWSwapOnchainOrders.json"
+        )?
         .npm(
             "ERC20",
             "@openzeppelin/contracts@3.3.0/build/contracts/ERC20.json",
diff --git a/crates/refunder/src/arguments.rs b/crates/refunder/src/arguments.rs
index 9d9922b8fa..b759931d3b 100644
--- a/crates/refunder/src/arguments.rs
+++ b/crates/refunder/src/arguments.rs
@@ -41,7 +41,7 @@ pub struct Arguments {
     #[clap(
         long,
         env,
-        default_value = "0x26c3801b4840dab317cedfd7aeaf9f45fdd22830"
+        default_value = "0x76aAf674848311C7F21fc691B0b952f016dA49F3"
     )]
     pub ethflow_contract: H160,