In this section, we'll make our first transaction on the Coda network. After installing the software, we'll need to create a new account before we can send or receive coda. Let's first start up the node so that we can start issuing commands.
For the 3.2a testnet, we are not running a live network. Instead, we encourage you to play with the Sandbox Node.
Once you set up the sandbox node, you can skip steps that pertain to running
Run the following command to start up a Coda node instance and connect to the live network:
coda daemon -peer $SEED1 -peer $SEED2
-peer arguments specified above refer to the seed peer address - this is the initial peer we will connect to on the network. Since Coda is a peer-to-peer protocol, there is no single centralized server we rely on.
By default, the node connects to the network using the default external-port of 8302. This can be changed using the
The daemon process needs to be running whenever you issue commands from
coda client, so make sure you don't kill it by accident.
See here for common issues when first running a node.
Now that we've started up a node and are running the Coda daemon, open up another shell and run the following command:
coda client status
It may take up to a minute before
coda client status connects to the daemon when first starting up. So if you see
Error: daemon not running. See coda daemon, just a wait a bit and try again.
If you are using the Sandbox Node, due to a quirk in the way we communicate for the coda client status command, you will need to run
coda client status inside the container itself:
docker exec -it coda bash
Most likely we will see a response that include the fields below:
... Peers: Total: 4 (...) ... Sync Status: Bootstrap
If you see
Sync Status: Bootstrap, this means that the Coda node is bootstrapping and needs to sync with the rest of the network. You may need to be patient here as this step might take some time for the node to get all the data it needs. When sync status reaches
Synced and the node is connected to 1 or more peers, we will have successfully connected to the network. We will also see a corresponding daemon log once we've synced:
[Info] Coda daemon is now synced.
If you the
Bootstrap state persists for more than an hour, there may be an issue with your port configuration.
Once our node is synced, we'll create a public/private key-pair so that we can sign transactions and generate an address to receive payments. For security reasons, we'll want to put the keys under a directory that is harder for attackers to access.
Run the following command to create a new account/keypair:
coda accounts create
coda accounts -help to learn more about how to use the command.
The public key can be shared freely with anyone, but be very careful with your private key file. Never share this private key with anyone, as it is the equivalent of a password for your funds.
The response from this command will look like this:
😄 Added new account! Public key: ZsMSUrGkF2TaBv9z2j6jco5JjL4MnywfAQtsHMuswj2zWnTUsArfEStetwuu63Um6jC
Since the public key is quite long and difficult to remember, let's save it as an environment variable:
Now we can access this everywhere as
$CODA_PUBLIC_KEY -- see if it saved properly by trying
Note that these environment variables will only be saved for the current shell session, so if you want to save them for future use, you can add them to
If you are running the node on a cloud virtual machine, make sure to export and save the key file. You can export the key with:
coda accounts export -public-key <PUBLIC-KEY> -privkey-path <EXPORT-PATH>
Then save it to your local machine, maybe using scp:
scp <EXPORT-PATH> <LOCAL-DESTINATION>
Later, when starting up a new VM, you can upload the key and then import it:
coda accounts import -privkey-path <PRIVATE-KEY-FILE>
If you ever forget what keypairs you've already created, you can see them all with:
coda accounts list
If the faucet is currently under maintenance, please request coda in the #faucet channel, and a core team member or community member will send you some tokens shortly.
Faucet Status: Unknown
In order to send our first transaction, we'll first need to get some coda to play with. Head over to the Coda Discord server and join the
#faucet channel. Once there, ask Tiny the dog for some coda (you'll receive 10 coda). Here's an example:
It may take a few minutes for your funds to appear. We can check the balance of all our accounts using this command:
coda accounts list
You might see
Balance: 0 coda for your account. Depending on the traffic in the network, it may take a few blocks before your transaction goes through.
Hint: You can run
coda client status to see the current block height updating.
Finally we get to the good stuff, sending our first transaction! Before you send a payment, you'll need to unlock your account:
coda accounts unlock -public-key $CODA_PUBLIC_KEY
For testing purposes, there's already an echo service set up that will immediately refund your payment minus the transaction fees.
Let's send some of our newly received coda to this service to see what a payment looks like:
coda client send-payment \ -amount 0.5 \ -receiver 4vsRCVNep7JaFhtySu6vZCjnArvoAhkRscTy5TQsGTsKM4tJcYVc3uNUMRxQZAwVzSvkHDGWBmvhFpmCeiPASGnByXqvKzmHt4aR5uAWAQf3kqhwDJ2ZY3Hw4Dzo6awnJkxY338GEp12LE4x \ -fee 0.1 \ -sender $CODA_PUBLIC_KEY
If you're wondering what we passed in to the commands above:
amount, we're sending a test value of
receiveris the public key of the echo service
fee, let's use 0.1 coda
senderis the full public key, eg.
If this command is formatted properly, we should get a response that looks like the following:
Dispatched payment with ID 3XCgvAHLAqz9VVbU7an7f2L5ffJtZoFega7jZpVJrPCYA4j5HEmUAx51BCeMc232eBWVz6q9t62Kp2cNvQZoNCSGqJ1rrJpXFqMN6NQe7x987sAC2Sd6wu9Vbs9xSr8g1AkjJoB65v3suPsaCcvvCjyUvUs8c3eVRucH4doa2onGj41pjxT53y5ZkmGaPmPnpWzdJt4YJBnDRW1GcJeyqj61GKWcvvrV6KcGD25VEeHQBfhGppZc7ewVwi3vcUQR7QFFs15bMwA4oZDEfzSbnr1ECoiZGy61m5LX7afwFaviyUwjphtrzoPbQ2QAZ2w2ypnVUrcJ9oUT4y4dvDJ5vkUDazRdGxjAA6Cz86bJqqgfMHdMFqpkmLxCdLbj2Nq3Ar2VpPVvfn2kdKoxwmAGqWCiVhqYbTvHkyZSc4n3siGTEpTGAK9usPnBnqLi53Z2bPPaJ3PuZTMgmdZYrRv4UPxztRtmyBz2HdQSnH8vbxurLkyxK6yEwS23JSZWToccM83sx2hAAABNynBVuxagL8aNZF99k3LKX6E581uSVSw5DAJ2S198DvZHXD53QvjcDGpvB9jYUpofkk1aPvtW7QZkcofBYruePM7kCHjKvbDXSw2CV5brHVv5ZBV9DuUcuFHfcYAA2TVuDtFeNLBjxDumiBASgaLvcdzGiFvSqqnzmS9MBXxYybQcmmz1WuKZHjgqph99XVEapwTsYfZGi1T8ApahcWc5EX9 Receipt chain hash is now A3gpLyBJGvcpMXny2DsHjvE5GaNFn2bbpLLQqTCHuY3Nd7sqy8vDbM6qHTwHt8tcfqqBkd36LuV4CC6hVH6YsmRqRp4Lzx77WnN9gnRX7ceeXdCQUVB7B2uMo3oCYxfdpU5Q2f2KzJQ46
You may not see the
Receipt chain hash on the first transaction from the account, but in following transactions, this will show you the head of the receipt chain hash list.
Once you feel comfortable with the basics of creating an address, and sending & receiving coda, we can move on to the truly unique parts of the Coda network - participating in consensus and helping compress the blockchain.
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