diff --git a/mtl_nft.py b/mtl_nft.py
index a0c7fab..02fcb7e 100755
--- a/mtl_nft.py
+++ b/mtl_nft.py
@@ -5,44 +5,51 @@
 # pylint: disable=missing-module-docstring
 
 
+from typing import Optional
+
 from stellar_sdk import Asset, Keypair, Network, Server, TransactionBuilder
 
 
-OPERATOR_KP = Keypair.from_secret(
-    ''
-)
+OPERATOR_KP = Keypair.from_secret("")
 
 ISSUER_KP = Keypair.from_secret(
-    'SAZLFVGFGKWYGTLLLULUFTWCZ7LVNHCBPSV5F7ZQXRGRHC4UXMAJ2BQK'
+    "SBOEURAX4BL5LQVLIN6LOMPM2DFLOYTVCQ5HHRK4IMVQGOYKDJ67EEIS"
 )
 ISSUER_ACCOUNT = (
     ISSUER_KP.public_key
-    # GDEYCMUYQ7BHV5UYYBH2BTPCQ3LT3TCYTW6XKKFJCTAS7PK5EQKCGNFT
+    # GCTE2BR4WYD73Y3KRC6JOX2LYFH5WKAWO7VYCZXVZ5XLNWMYCIQFDNFT
 )
 
-TOKEN_NAMES = [f'UB{a}' for a in [929, 930, 2109, 2116, 2117]]
+TOKEN_NAMES = ["Hub1369p14", "MtlDome001", "MtlDome002", "WH1369p20"]
+TOKENS_TO_MINT = [Asset(name, ISSUER_ACCOUNT) for name in TOKEN_NAMES]
+TOKENS_TO_BURN = [
+    Asset("BP1369p14", "GC2ZK7OONSYECUWI42A5KXG2M7XIGEC2CIBOD4BJ4EHWYJWV6BHC6NFT"),
+    Asset("BP1369p20", "GC2ZK7OONSYECUWI42A5KXG2M7XIGEC2CIBOD4BJ4EHWYJWV6BHC6NFT"),
+]
+TOKEN_HOLDER = "GBJ3HT6EDPWOUS3CUSIJW5A4M7ASIKNW4WFTLG76AAT5IE6VGVN47TIC"
 
-TOKENS = [Asset(name, ISSUER_ACCOUNT) for name in TOKEN_NAMES]
-
-DISTRIBUTOR_ACCOUNT = 'GDPHAKGLJ3B56BK4CZ2VMTYEDI6VZ2CTHUHSFAFSPGSTJHZEI3ATOKEN'
+DISTRIBUTOR_ACCOUNT = "GDPHAKGLJ3B56BK4CZ2VMTYEDI6VZ2CTHUHSFAFSPGSTJHZEI3ATOKEN"
 DISTRIBUTOR_KP = Keypair.from_public_key(DISTRIBUTOR_ACCOUNT)
 
-ATOMIC_TOKEN = '0.0000001'
+ATOMIC_TOKEN = "0.0000001"
 
 SERVER = Server("https://horizon.stellar.org")
 
 
 class TokenBuilder(TransactionBuilder):
-    def __init__(self, account_address: str):
-        account = SERVER.load_account(account_address)
-        super().__init__(account, Network.PUBLIC_NETWORK_PASSPHRASE, 100)
+    issuer_address: str
+
+    def __init__(self, source_address: str, issuer_address: str):
+        self.issuer_address = issuer_address
+        source_account = SERVER.load_account(source_address)
+        super().__init__(source_account, Network.PUBLIC_NETWORK_PASSPHRASE, 100)
 
     def create_issuer(self):
-        self.append_create_account_op(ISSUER_ACCOUNT, '1')
+        self.append_create_account_op(self.issuer_address, "1")
 
     def init_issuer(self):
         self.append_set_options_op(
-            home_domain='nft.montelibero.org', source=ISSUER_ACCOUNT
+            home_domain="nft.montelibero.org", source=self.issuer_address
         )
 
     def create_and_init_issuer(self):
@@ -50,28 +57,27 @@ def create_and_init_issuer(self):
         self.init_issuer()
 
     def set_issuer_data(self, key, value):
-        self.append_manage_data_op(key, value, source=ISSUER_ACCOUNT)
+        self.append_manage_data_op(key, value, source=self.issuer_address)
 
-    def trust(self, asset: Asset, account: str = None):
+    def trust(self, asset: Asset, account: Optional[str] = None):
         self.append_change_trust_op(asset, limit=ATOMIC_TOKEN, source=account)
 
     def mint_to(self, asset: Asset, receiver: str):
         self.trust(
             asset,
-            account =
-                None
-                if receiver == self.source_account.account.account_id
-                else receiver,
+            account=(
+                None if receiver == self.source_account.account.account_id else receiver
+            ),
         )
         self.append_payment_op(
-            receiver, asset, ATOMIC_TOKEN, source=ISSUER_ACCOUNT
+            receiver, asset, ATOMIC_TOKEN, source=self.issuer_address
         )
 
     def mint(self, asset: Asset):
         self.mint_to(asset, DISTRIBUTOR_ACCOUNT)
 
     def lock_issuer(self):
-        self.append_set_options_op(master_weight=0, source=ISSUER_ACCOUNT)
+        self.append_set_options_op(master_weight=0, source=self.issuer_address)
 
     def build_and_sign(self, signers):
         transaction = self.build()
@@ -85,33 +91,41 @@ def send(self, asset: Asset, source: str, destination: str):
     def send_from_distributor(self, asset: Asset, destination: str):
         self.send(asset, DISTRIBUTOR_ACCOUNT, destination)
 
-    def untrust(self, asset: Asset):
-        self.append_change_trust_op(
-            asset, limit='0', source=DISTRIBUTOR_ACCOUNT
-        )
-
-    def burn(self, asset: Asset, amount: str):
-        self.append_payment_op(asset.issuer or '', asset, amount)
+    def untrust(self, asset: Asset, source: str):
+        self.append_change_trust_op(asset=asset, limit="0", source=source)
 
-    def burn_and_untrust(self, asset: Asset):
-        self.send(
-            asset, source=DISTRIBUTOR_ACCOUNT, destination = asset.issuer or ''
+    def burn(
+        self, asset: Asset, amount: str = ATOMIC_TOKEN, source: Optional[str] = None
+    ):
+        self.append_payment_op(
+            destination=asset.issuer or "",
+            asset=asset,
+            amount=amount,
+            source=source,
         )
-        self.untrust(asset)
+
+    def burn_and_untrust(self, asset: Asset, source: str):
+        self.send(asset=asset, source=source, destination=asset.issuer or "")
+        self.untrust(asset, source)
 
 
 def main():
-    builder = TokenBuilder(DISTRIBUTOR_ACCOUNT)
-    builder.create_and_init_issuer()
-    for token in TOKENS:
-        builder.mint(token)
-    builder.lock_issuer()
-
-    # transaction = builder.build_and_sign([OPERATOR_KP])
-    transaction = builder.build_and_sign([ISSUER_KP, OPERATOR_KP])
+    builder = TokenBuilder(
+        source_address=DISTRIBUTOR_ACCOUNT, issuer_address=ISSUER_ACCOUNT
+    )
+    # builder.create_and_init_issuer()
+    for token in TOKENS_TO_MINT:
+        builder.trust(token)
+        # builder.mint_to(token, TOKEN_HOLDER)
+
+    # for token in TOKENS_TO_BURN:
+    #     builder.burn(token, source=TOKEN_HOLDER)
+    # builder.lock_issuer()
+
+    transaction = builder.build_and_sign([OPERATOR_KP])  # ISSUER_KP,
     print(transaction.to_xdr())
-    # print(SERVER.submit_transaction(transaction))
+    print(SERVER.submit_transaction(transaction))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()