Register a Stake Pool with Metadata

Make sure you have access to:

  • One or more funded addresses.

  • The keys and operational certificate for the stake pool.

  • The stake keys.

At this moment we have:




payment verification key


payment signing key


staking verification key


staking signing key


registered stake address


funded address linked to stake


cold verification key


cold signing key


issue counter


operational certificate


KES verification key


KES signing key


VRF verification key


VRF signing key

To register your stake pool, you must:

  • Create JSON file with your metadata and store it in the node and in a url you maintain.

  • Get the hash of your JSON file

  • Generate the stake pool registration certificate

  • Create a delegation certificate (pledge)

  • Submit the certificates to the blockchain

  • Submit a PR with pool metadata (Temporary step until DB-sync is upgraded)

WARNING: Generating the stake pool registration certificate and the delegation certificate requires the cold keys So, when doing this on mainnet you may want to generate these certificates in your local machine, taking the proper security measures to avoid exposing your cold keys to the internet.

Create a JSON file with your pool's metadata

"name": "TestPool",
"description": "The pool that tests all the pools",
"ticker": "TEST",
"homepage": ""

Store the file in a url you control, for example

You can use a GIST in github, just make sure that the URL is less than 65 characters long.

Get the hash of your file:

This validates that the JSON fits the required schema; if it does, you will get the hash of your file.

cardano-cli shelley stake-pool metadata-hash --pool-metadata-file testPool.json

Generate Stake pool registration certificate

Create a stake pool registration certificate:

cardano-cli shelley stake-pool registration-certificate \
--cold-verification-key-file cold.vkey \
--vrf-verification-key-file vrf.vkey \
--pool-pledge 70000000000 \
--pool-cost 4321000000 \
--pool-margin 0.04 \
--pool-reward-account-verification-key-file stake.vkey \
--pool-owner-stake-verification-key-file stake.vkey \
--testnet-magic 1097911063 \
--pool-relay-ipv4 \
--pool-relay-port 3000 \
--metadata-url \
--metadata-hash d0e21b420a554d7d2d0d85c4e62a1980d6b9d8f7a2d885b3de0fff472e37241b \
--out-file pool-registration.cert




verification cold key


verification VRS key


pledge (lovelace)


operational costs per epoch (lovelace)


operator margin


verification staking key for the rewards


verification staking key(s) for the pool owner(s)


output file to write the certificate to




relay node ip address


url of your json file


the hash of pools json metadata file

So in the example above, we use the cold- and VRF-keys that we created here, promise to pledge 100,000 ada to our pool, declare operational costs of 10,000 ada per epoch, set the operational margin (i.e. the ratio of rewards we take after taking our costs and before the rest is distributed amongst owners and delegators according to their delegated stake) to 5%, use the staking key we created here to receive our rewards and use the same key as pool owner key for the pledge.

We could use a different key for the rewards, and we could provide more than one owner key if there were multiple owners who share the pledge.

The pool.cert file should look like this:

type: StakePoolCertificateShelley
title: Free form text

Generate delegation certificate (pledge)

We have to honor our pledge by delegating at least the pledged amount to our pool, so we have to create a delegation certificate to achieve this:

cardano-cli shelley stake-address delegation-certificate \
--stake-verification-key-file stake.vkey \
--cold-verification-key-file cold.vkey \
--out-file delegation.cert

This creates a delegation certificate which delegates fund from all stake addresses associated with key stake.vkey to the pool belonging to cold key cold.vkey. If we had used different staking keys for the pool owners in the first step, we would need to create delegation certificates for all of them instead.

Submit the pool certificate and delegation certificate to the blockchain

Finally we need to submit the pool registration certificate and the delegation certificate(s) to the blockchain by including them in one or more transactions. We can use one transaction for multiple certificates, the certificates will be applied in order.

As before, we start by drafting the transaction:

cardano-cli shelley transaction build-raw \
--tx-in 9db6cf...#0 \
--tx-out $(cat paymentwithstake.addr)+0 \
--ttl 0 \
--fee 0 \
--out-file tx.raw \
--certificate-file pool-registration.cert \
--certificate-file delegation.cert

Calculate the fees

cardano-cli shelley transaction calculate-min-fee \
--tx-body-file tx.raw \
--tx-in-count 1 \
--tx-out-count 1 \
--testnet-magic 1097911063 \
--witness-count 1 \
--byron-witness-count 0 \
--protocol-params-file protocol.json
> 184685

We have to pay a deposit for the stake pool registration. The deposit amount is specified in the genesis file and in protocol.json

"poolDeposit": 500000000

to calculate the correct amounts, we first query our address as explained here.

We might get something like

TxHash TxIx Lovelace
9db6cf... 0 999999267766

Note that the available funds are higher than the pledge, which is fine. They just must not be lower.

In this example, we can now calculate our change:

expr 999999267766 - 500000000 - 184685
> 999499083081

Now we can build the transaction:

cardano-cli shelley transaction build-raw \
--tx-in 9db6cf...#0 \
--tx-out $(cat addresses/paymentwithstake.addr)+999499083081 \
--ttl 200000 \
--fee 184685 \
--certificate-file pool-registration.cert \
--certificate-file delegation.cert \
--out-file tx.raw

Sign it:

cardano-cli shelley transaction sign \
--tx-body-file tx.raw \
--signing-key-file payment.skey \
--signing-key-file stake.skey \
--signing-key-file cold.skey \
--testnet-magic 1097911063 \
--out-file tx.signed

And submit:

cardano-cli shelley transaction submit \
--tx-file tx.signed \
--testnet-magic 1097911063

To verify that your stake pool registration was indeed successful, you can perform the following steps:

cardano-cli shelley stake-pool id --verification-key-file cold.vkey

will output your poolID. You can then check for the presence of your poolID in the network ledger state, with the following command:

cardano-cli shelley query ledger-state --testnet-magic 1097911063 | grep publicKey | grep <poolId>


cardano-cli shelley query ledger-state --testnet-magic 1097911063 \
| jq '._delegationState._pstate._pParams.<poolid>'

which should return a non-empty string if your poolID is located in the ledger. You can then head over to a pool listing website such as and (providing it is up and running and showing a list of registered stake pools) you should hopefully be able to find your pool in there by searching using your poolID, and subsequently claiming it (might require registration on the website) and giving it a customized name.


If you have any questions and suggestions while taking the lessons please feel free to ask in the forum and we will respond as soon as possible.