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Cardano Submit Transaction API Tutorial

Why this Guide?​

  • This guide is intended to show Raspberry-pi/ARM users how to use the Cardano Submit API with their own running Cardano node to watch for successful transaction submissions while using Nami wallet.
caution

In order to follow this guide you need:

  1. A raspberry pi 4 or other arm64 based computer
  2. Your computer must already have the Cardano Node software actively running and synced to the blockchain
  3. You need to install the Nami Wallet google chrome extension from the google app store.
caution

If you've set up your node using our docker image guide, you can skip the first part of this guide and jump directly to chapter Connect the Cardano Submit API with Nami Wallet below, because the docker image already includes the tx-submit-service.

Download and Install Cardano Submit API​

Download the latest version of the Cardano node, cli, and tx-submit-api from the Armada Alliance Github repository.

>_ Terminal
wget -O 8_1_2.zip https://github.com/armada-alliance/cardano-node-binaries/blob/main/static-binaries/8_1_2.zip?raw=true

Unzip the contents of the zip file.

>_ Terminal
unzip 8_1_2.zip -d cardano-node-8.1.2
>_ Terminal
mv cardano-node-8.1.2/cardano-node/cardano-submit-api ~/.local/bin/

Make a simple bash script to run the Cardano Submit API​

You can use whatever text editor you would like and feel free to change the file name if you would like.

>_ Terminal
nano ~/.local/bin/tx-submit-service

Next, copy and paste the following into the file:

>_ Terminal
#!/bin/bash

cardano-submit-api \
  --socket-path /home/ada/pi-pool/db/socket \
  --port 8090 \
  --config /home/ada/pi-pool/files/tx-submit-mainnet-config.yaml \
  --listen-address 0.0.0.0 \
  --mainnet
caution

Before you save and exit you need to make sure you have entered the correct full path to your Cardano node's socket and tx-submit-mainnet-config.yaml file because it will be different.

Save and exit. Now we need to give permissions to the file so that it can be executed.

>_ Terminal
chmod +x ~/.local/bin/tx-submit-service

Get the tx-submit-mainnet-config.yaml file from IOG's github repository​

>_ Terminal
cd ~/pi-pool/files && wget -O tx-submit-mainnet-config.yaml https://raw.githubusercontent.com/input-output-hk/cardano-node/master/cardano-submit-api/config/tx-submit-mainnet-config.yaml

Test the Cardano Submit API​

Create a tmux session for the Cardano Submit API service.

>_ Terminal
tmux new-session -d -t cardano-submit-api && tmux attach -t cardano-submit-api

Run the Cardano Submit API service.

>_ Terminal
~/.local/bin/tx-submit-service

You should see the following output in your terminal:

Connect the Cardano Submit API with Nami Wallet​

Now you just need to connect the Cardano Submit API with Nami Wallet. Open your browser with your Nami wallet navigate to settings, select network, switch on custom node mode, then enter in http://localhost:8090/api/submit/tx.

caution

If you are using a local network node (i.e. a node running at home in your local network) then you need to enter** **http://x.x.x.x:8090/api/submit/tx** **and replace the** **x.x.x.x** **with the IP address of your local network node.

Test the Cardano Submit API with Nami Wallet​

Now that that is setup, let's just test this by sending some ada to ourselves using Nami Wallet. Once you get the tx submitted success notification from Nami wallet, head back to the tmux session you created earlier that is running the cardano-submit-api and look to see if your transaction was submitted. It will output the following log message: