Do not set proxy only for this time

contracts/mixnet/src/delegations/transactions.rs

@@ -56,14 +56,7 @@ pub(crate) fn try_delegate_to_mixnode_on_behalf(
     // check if the delegation contains any funds of the appropriate denomination
     let amount = validate_delegation_stake(info.funds)?;
 
-    _try_delegate_to_mixnode(
-        deps,
-        env,
-        mix_identity,
-        &delegate,
-        amount,
-        Some(info.sender),
-    )
+    _try_delegate_to_mixnode(deps, env, mix_identity, &delegate, amount, None)
 }
 
 pub(crate) fn _try_delegate_to_mixnode(

contracts/mixnet/src/gateways/transactions.rs

@@ -52,16 +52,8 @@ pub fn try_add_gateway_on_behalf(
         .minimum_mixnode_pledge;
     let pledge = validate_gateway_pledge(info.funds, minimum_pledge)?;
 
-    let proxy = info.sender;
-    _try_add_gateway(
-        deps,
-        env,
-        gateway,
-        pledge,
-        &owner,
-        owner_signature,
-        Some(proxy),
-    )
+    let _proxy = info.sender;
+    _try_add_gateway(deps, env, gateway, pledge, &owner, owner_signature, None)
 }
 
 pub(crate) fn _try_add_gateway(

contracts/mixnet/src/mixnodes/transactions.rs

@@ -54,16 +54,8 @@ pub fn try_add_mixnode_on_behalf(
         .minimum_mixnode_pledge;
     let pledge = validate_mixnode_pledge(info.funds, minimum_pledge)?;
 
-    let proxy = info.sender;
-    _try_add_mixnode(
-        deps,
-        env,
-        mix_node,
-        pledge,
-        &owner,
-        owner_signature,
-        Some(proxy),
-    )
+    let _proxy = info.sender;
+    _try_add_mixnode(deps, env, mix_node, pledge, &owner, owner_signature, None)
 }
 
 fn _try_add_mixnode(