diff --git a/silkaj/tx.py b/silkaj/tx.py
index e1a9c2f6b499f4381fdb44e109995de0b537c530..5bac90ba886b2a0fe517c97e629ef35d871cca70 100644
--- a/silkaj/tx.py
+++ b/silkaj/tx.py
@@ -19,20 +19,20 @@ from re import compile, search
 import math
 from time import sleep
 from tabulate import tabulate
-from click import command, option, FloatRange
+from click import command, option, FloatRange, group
 
-from silkaj.cli_tools import MutuallyExclusiveOption
-from silkaj.network_tools import ClientInstance, HeadBlock
-from silkaj.crypto_tools import check_public_key
-from silkaj.tools import message_exit, CurrencySymbol, coroutine
-from silkaj.auth import auth_method
+from silkaj import cli_tools
+from silkaj import network_tools as nt
+from silkaj import crypto_tools as ct
+from silkaj import tools
+from silkaj import auth
 from silkaj import money
+from silkaj import tui
 from silkaj.constants import (
     SOURCES_PER_TX,
     MINIMAL_TX_AMOUNT,
     CENT_MULT_TO_UNIT,
 )
-from silkaj.tui import display_amount, display_pubkey
 
 from duniterpy.api.bma.tx import process
 from duniterpy.documents import BlockUID, Transaction
@@ -49,7 +49,7 @@ from duniterpy.documents.transaction import OutputSource, Unlock, SIGParameter
     help="Quantitative amount(s):\n-a <amount>\nMinimum amount is {0}".format(
         MINIMAL_TX_AMOUNT
     ),
-    cls=MutuallyExclusiveOption,
+    cls=cli_tools.MutuallyExclusiveOption,
     mutually_exclusive=["amountsud", "allsources"],
 )
 @option(
@@ -59,14 +59,14 @@ from duniterpy.documents.transaction import OutputSource, Unlock, SIGParameter
     multiple=True,
     type=float,
     help="Relative amount(s):\n-d <amount_UD>",
-    cls=MutuallyExclusiveOption,
+    cls=cli_tools.MutuallyExclusiveOption,
     mutually_exclusive=["amounts", "allsources"],
 )
 @option(
     "--allSources",
     is_flag=True,
     help="Send all sources to one recipient",
-    cls=MutuallyExclusiveOption,
+    cls=cli_tools.MutuallyExclusiveOption,
     mutually_exclusive=["amounts", "amountsud"],
 )
 @option(
@@ -86,7 +86,7 @@ Sending to many recipients is possible :\n\
     help="Pubkey recipient to send the rest of the transaction: <pubkey[!checksum]>",
 )
 @option("--yes", "-y", is_flag=True, help="Assume yes. Do not prompt confirmation")
-@coroutine
+@tools.coroutine
 async def send_transaction(
     amounts, amountsud, allsources, recipients, comment, outputbackchange, yes
 ):
@@ -94,15 +94,15 @@ async def send_transaction(
     Main function
     """
     if not (amounts or amountsud or allsources):
-        message_exit("Error : amount, amountUD or allSources is not set.")
+        tools.message_exit("Error : amount, amountUD or allSources is not set.")
     if not allsources:
         tx_amounts = await transaction_amount(amounts, amountsud, recipients)
     elif len(recipients) > 1:
-        message_exit(
+        tools.message_exit(
             "Error: the --allSources option can only be used with one recipient."
         )
 
-    key = auth_method()
+    key = auth.auth_method()
     issuer_pubkey = key.pubkey
     pubkey_amount = await money.get_amount_from_pubkey(issuer_pubkey)
 
@@ -139,7 +139,7 @@ async def send_transaction(
             key, issuer_pubkey, tx_amounts, recipients, comment, outputbackchange,
         )
     else:
-        client = ClientInstance().client
+        client = nt.ClientInstance().client
         await client.close()
 
 
@@ -154,11 +154,11 @@ async def transaction_amount(amounts, amountUDs, outputAddresses):
     # creating amounts list
     if amounts:
         if len(amounts) != len(outputAddresses) and len(amounts) != 1:
-            message_exit(error_message_number_recipients_amounts)
+            tools.message_exit(error_message_number_recipients_amounts)
         amounts_list = compute_amounts(amounts, CENT_MULT_TO_UNIT)
     elif amountUDs:
         if len(amountUDs) != len(outputAddresses) and len(amountUDs) != 1:
-            message_exit(error_message_number_recipients_amounts)
+            tools.message_exit(error_message_number_recipients_amounts)
         UD_value = await money.UDValue().ud_value
         amounts_list = compute_amounts(amountUDs, UD_value)
     # generating list for many issuers
@@ -181,7 +181,7 @@ def compute_amounts(amounts, multiplicator):
         if (multiplicator != CENT_MULT_TO_UNIT) and (
             computed_amount < (MINIMAL_TX_AMOUNT * CENT_MULT_TO_UNIT)
         ):
-            message_exit("Error: amount {0} is too low.".format(amount))
+            tools.message_exit("Error: amount {0} is too low.".format(amount))
         amounts_list.append(round(computed_amount))
     return amounts_list
 
@@ -191,14 +191,14 @@ def check_transaction_values(
 ):
     checkComment(comment)
     for outputAddress in outputAddresses:
-        if check_public_key(outputAddress, True) is False:
-            message_exit(outputAddress)
+        if ct.check_public_key(outputAddress, True) is False:
+            tools.message_exit(outputAddress)
     if outputBackChange:
-        outputBackChange = check_public_key(outputBackChange, True)
-        if check_public_key(outputBackChange, True) is False:
-            message_exit(outputBackChange)
+        outputBackChange = ct.check_public_key(outputBackChange, True)
+        if ct.check_public_key(outputBackChange, True) is False:
+            tools.message_exit(outputBackChange)
     if enough_source:
-        message_exit(
+        tools.message_exit(
             issuer_pubkey + " pubkey doesn’t have enough money for this transaction."
         )
 
@@ -215,32 +215,32 @@ async def transaction_confirmation(
     Generate transaction confirmation
     """
 
-    currency_symbol = await CurrencySymbol().symbol
+    currency_symbol = await tools.CurrencySymbol().symbol
     ud_value = await money.UDValue().ud_value
     total_tx_amount = sum(tx_amounts)
     tx = list()
     # display account situation
-    display_amount(
+    tui.display_amount(
         tx, "pubkey's balance before tx", pubkey_amount, ud_value, currency_symbol,
     )
-    display_amount(
+    tui.display_amount(
         tx, "total transaction amount", total_tx_amount, ud_value, currency_symbol,
     )
-    display_amount(
+    tui.display_amount(
         tx,
         "pubkey's balance after tx",
         (pubkey_amount - total_tx_amount),
         ud_value,
         currency_symbol,
     )
-    await display_pubkey(tx, "from", issuer_pubkey)
+    await tui.display_pubkey(tx, "from", issuer_pubkey)
     # display outputs and amounts
     for outputAddress, tx_amount in zip(outputAddresses, tx_amounts):
-        await display_pubkey(tx, "to", outputAddress)
-        display_amount(tx, "amount", tx_amount, ud_value, currency_symbol)
+        await tui.display_pubkey(tx, "to", outputAddress)
+        tui.display_amount(tx, "amount", tx_amount, ud_value, currency_symbol)
     # display last informations
     if outputBackChange:
-        await display_pubkey(tx, "Backchange", outputBackChange)
+        await tui.display_pubkey(tx, "Backchange", outputBackChange)
     tx.append(["comment", comment])
     return tx
 
@@ -263,14 +263,14 @@ async def get_list_input_for_transaction(pubkey, TXamount):
         if TXamount <= 0:
             break
     if TXamount > 0 and not intermediatetransaction:
-        message_exit("Error: you don't have enough money")
+        tools.message_exit("Error: you don't have enough money")
     return listinputfinal, totalAmountInput, intermediatetransaction
 
 
 async def handle_intermediaries_transactions(
     key, issuers, tx_amounts, outputAddresses, Comment="", OutputbackChange=None,
 ):
-    client = ClientInstance().client
+    client = nt.ClientInstance().client
     while True:
         listinput_and_amount = await get_list_input_for_transaction(
             issuers, sum(tx_amounts)
@@ -326,7 +326,7 @@ async def generate_and_send_transaction(
         display_sent_tx(outputAddress, tx_amount)
     print("   - Total:   " + str(sum(tx_amounts) / 100))
 
-    client = ClientInstance().client
+    client = nt.ClientInstance().client
     transaction = await generate_transaction_document(
         issuers,
         tx_amounts,
@@ -336,11 +336,12 @@ async def generate_and_send_transaction(
         OutputbackChange,
     )
     transaction.sign([key])
+
     response = await client(process, transaction.signed_raw())
     if response.status == 200:
         print("Transaction successfully sent.")
     else:
-        message_exit(
+        tools.message_exit(
             "Error while publishing transaction: {0}".format(await response.text())
         )
 
@@ -362,7 +363,7 @@ async def generate_transaction_document(
     totalAmountInput = listinput_and_amount[1]
     total_tx_amount = sum(tx_amounts)
 
-    head_block = await HeadBlock().head_block
+    head_block = await nt.HeadBlock().head_block
     currency_name = head_block["currency"]
     blockstamp_current = BlockUID(head_block["number"], head_block["hash"])
     curentUnitBase = head_block["unitbase"]
@@ -431,12 +432,12 @@ def generate_output(listoutput, unitbase, rest, recipient_address):
 
 def checkComment(Comment):
     if len(Comment) > 255:
-        message_exit("Error: Comment is too long")
+        tools.message_exit("Error: Comment is too long")
     regex = compile(
         "^[0-9a-zA-Z\ \-\_\:\/\;\*\[\]\(\)\?\!\^\+\=\@\&\~\#\{\}\|\\\<\>\%\.]*$"
     )
     if not search(regex, Comment):
-        message_exit("Error: the format of the comment is invalid")
+        tools.message_exit("Error: the format of the comment is invalid")
 
 
 def truncBase(amount, base):