diff --git a/circom_circuits/Mantle/generate_inputs_for_shielded_transaction.py b/circom_circuits/Mantle/generate_inputs_for_shielded_transaction.py
index caa2a62..096cdf6 100755
--- a/circom_circuits/Mantle/generate_inputs_for_shielded_transaction.py
+++ b/circom_circuits/Mantle/generate_inputs_for_shielded_transaction.py
@@ -212,7 +212,7 @@ maxInputs = int(sys.argv[Integer(1)])
 maxOutputs = int(sys.argv[Integer(2)])
 
 value_in = [F(randrange(0,10000,1) )for i in range(maxInputs) ]
-unit = F(19676183153323264216568033390884511718872104179761154996527087027500271872825)
+unit = F(10779557959052216631390333682740231728667240537997953966056427002575892499162)
 state_in = [F(randrange(0,p,1)) for i in range(maxInputs) ]
 zone_in = [F(randrange(0,p,1)) for i in range(maxInputs) ]
 note_nonce_in = [F(randrange(0,p,1)) for i in range(maxInputs)]
@@ -244,8 +244,7 @@ is_a_output_note[0] = F(1)
 
 
 with open("input.json", "w") as file:
-    file.write('{\n\t"minting_covenant" :\t\t\t\t"'+str(0)+'",')
-    file.write('\n\t"burning_covenant" :\t\t\t\t"'+str(0)+'",')
+    file.write('{\n\t"unit_arg_cm" :\t\t\t\t"'+str(0)+'",')
     file.write('\n\t"state_in" :\t\t\t\t\t[')
     for i in range(maxInputs):
         file.write('"')
diff --git a/circom_circuits/Mantle/ownership.circom b/circom_circuits/Mantle/ownership.circom
index 0ab0e6b..b0cc80e 100644
--- a/circom_circuits/Mantle/ownership.circom
+++ b/circom_circuits/Mantle/ownership.circom
@@ -23,4 +23,4 @@ template proof_of_unshielded_note_ownership(maxInput){
     dummy <== attached_data * attached_data;
 }
 
-component main {public [attached_data]}= proof_of_unshielded_note_ownership(1);
\ No newline at end of file
+component main {public [attached_data]}= proof_of_unshielded_note_ownership(5);
\ No newline at end of file
diff --git a/circom_circuits/Mantle/shielded_transaction.circom b/circom_circuits/Mantle/shielded_transaction.circom
index a297570..c90d24c 100644
--- a/circom_circuits/Mantle/shielded_transaction.circom
+++ b/circom_circuits/Mantle/shielded_transaction.circom
@@ -6,8 +6,7 @@ include "../misc/constants.circom";
 
 template shielded_transaction(maxInputs, maxOutputs){
 
-    signal input minting_covenant;      // Used to derive the unit and make sure the token use a no-op spending covenant.
-    signal input burning_covenant;
+    signal input unit_arg_cm;      // Used to derive the unit and make sure the token use a no-op spending covenant.
 
     //consummed notes
         // notes themselves
@@ -40,9 +39,10 @@ template shielded_transaction(maxInputs, maxOutputs){
 
     //Derive the unit
     component derive_unit = derive_unit();
-    derive_unit.minting_covenant <== minting_covenant;
+    derive_unit.minting_covenant <== 0;
     derive_unit.spending_covenant <== 0;                   // 0 encodes the fact that it's a no-op transfer covenant
-    derive_unit.burning_covenant <== burning_covenant;
+    derive_unit.burning_covenant <== 0;
+    derive_unit.unit_arg_cm <== unit_arg_cm;
     unit <== derive_unit.out;
 
 
diff --git a/circom_circuits/ledger/notes.circom b/circom_circuits/ledger/notes.circom
index 350a1cb..8135034 100644
--- a/circom_circuits/ledger/notes.circom
+++ b/circom_circuits/ledger/notes.circom
@@ -57,14 +57,16 @@ template derive_unit(){
     signal input minting_covenant;
     signal input spending_covenant;
     signal input burning_covenant;
+    signal input unit_arg_cm;
     signal output out;
 
-    component hash = Poseidon2_hash(4);
+    component hash = Poseidon2_hash(5);
     component dst = NOMOS_UNIT();
     hash.inp[0] <== dst.out;
     hash.inp[1] <== minting_covenant;
     hash.inp[2] <== spending_covenant;
     hash.inp[3] <== burning_covenant;
+    hash.inp[4] <== unit_arg_cm;
     out <== hash.out;
 }