Merge JoinMarket-Org/joinmarket-clientserver#1190: fix: improve NotEnoughCoinsForMaker error message

06dc4f7a05 fix: improve NotEnoughCoinsForMaker error message (Thebora Kompanioni)

Pull request description:

  Changes the error message when the maker cannot start due to not enough coins from:
  `"Maker could not start, no coins."` to `"Maker could not start, no confirmed coins."`

  According to @AdamISZ [here](https://github.com/joinmarket-webui/joinmarket-webui/issues/34#issuecomment-1032558663) this could be an improvement for the user, as it might make it clear that coins need to mature.

  Please just dismiss if you think it's not a good idea.

  Edit: The newline change has been made by GitHub automatically.. 🤔

ACKs for top commit:
  kristapsk:
    utACK 06dc4f7a05

Tree-SHA512: c72441e1050ec664248da01bd2df9a3fc95cf7477ea512d876797e4798ae5d915771821efa42a7de4da71df08295d796517f5eda2aabd49eb171ecc2529d9b82

jmclient/jmclient/wallet_rpc.py

@@ -318,7 +318,7 @@ class JMWalletDaemon(Service):
     def not_enough_coins(self, request, failure):
         # as above, 409 may not be ideal
         request.setResponseCode(409)
-        return self.err(request, "Maker could not start, no coins.")
+        return self.err(request, "Maker could not start, no confirmed coins.")
 
     @app.handle_errors(YieldGeneratorDataUnreadable)
     def yieldgenerator_report_unavailable(self, request, failure):
@@ -1025,4 +1025,4 @@ class JMWalletDaemon(Service):
             if not self.wallet_name == walletname:
                 raise InvalidRequestFormat()
             seedphrase, _ = self.services["wallet"].get_mnemonic_words()
-            return make_jmwalletd_response(request, seedphrase=seedphrase)
+            return make_jmwalletd_response(request, seedphrase=seedphrase)