8. Registering a Stake Pool with Metadata

First, make sure you have access to:

File Content
payment.vkey payment verification key
payment.skey payment signing key
stake.vkey staking verification key
stake.skey staking signing key
stake.addr registered stake address
payment.addr funded address linked to stake
cold.vkey cold verification key
cold.skey cold signing key
cold.counter issue counter
node.cert operational certificate
kes.vkey KES verification key
kes.skey KES signing key
vrf.vkey VRF verification key
vrf.skey VRF signing key

To register your stake pool you will need to:

  • Create a JSON file with your metadata and store it in the node and in the 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

WARNING: Generating the stake pool registration certificate and the delegation certificate requires using cold keys. 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.

8.1. Create a JSON file with your pool’s metadata:

  "name": "TestPool",
  "description": "The pool that tests all the pools",
  "ticker": "TEST",
  "homepage": "https://teststakepool.com"

Store the file in the url you control. For example https://teststakepool.com/poolMetadata.json. You can use a GIST in Github to store the definition and git.io to make it short. Ensure that the URL is less than 65 characters long.


Gist-URL https://gist.githubusercontent.com/carloslodelar/38c7482070627092a427583cae8fa470/raw/7fddda4d258bf685d24ea3510fbde295b3920188/clrpool.json

Git.IO-URL https://git.io/JJWdJ

8.2. Get the hash of your metadata JSON file

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

cardano-cli stake-pool metadata-hash --pool-metadata-file pool_Metadata.json


8.3. Register your relay nodes on-chain

The operator should register their relay nodes on-chain (including them into the pool’s registration certificate) to ensure that other peers on the network have an ability to connect to them. Registered relay nodes are continuously updated and added to a JSON dataset. IOG offers this list of all registered relays categorized by geographical location for SPOs to consider for connection purposes. It is recommended that SPOs generate a configuration that uses 20 other SPOs as peers. The list allows selecting peers that are both nearby and far away so that there is strong inter-region connectivity.

To register your relay nodes during the creation of the pool registration certificate, specify their IP addresses and/or domain name using:

--pool-relay-ipv4 <IPADDRESS>
--single-host-pool-relay <DOMAIN_NAME>

After certificate submission, relay nodes will be added to the topology file enabling other SPOs to connect to them. Additionally, one of the IOG nodes will also establish a connection so that an operator has at least one downstream peer.

Related topics:

8.4. Generate Stake pool registration certificate

cardano-cli stake-pool registration-certificate \
--cold-verification-key-file cold.vkey \
--vrf-verification-key-file vrf.vkey \
--pool-reward-account-verification-key-file stake.vkey \
--pool-owner-stake-verification-key-file stake.vkey \
--mainnet \
--pool-relay-ipv4 <RELAY NODE PUBLIC IP> \
--pool-relay-port <RELAY NODE PORT> \
--single-host-pool-relay STRING <The stake pool relay's DNS name that corresponds to an A or AAAA DNS record> \
--metadata-url https://git.io/JJWdJ \
--metadata-hash <POOL METADATA HASH> \
--out-file pool-registration.cert
Parameter Explanation
cold-verification-key-file verification cold key
vrf-verification-key-file verification VRS key
pool-pledge pledge lovelace
pool-cost operational costs per epoch lovelace
pool-margin operator margin
pool-reward-account-verification-key-file verification staking key for the rewards
pool-owner-staking-verification-key-file verification staking keys for the pool owners
pool-relay-ipv4 relay node ip address
pool-relay-port port
metadata-url url of your json file
metadata-hash the hash of pools json metadata file
out-file output file to write the certificate to

You can use a different key for the rewards, and you can provide more than one owner key if there were multiple owners who share the pledge.

The pool-registration.cert file should look like this:

type: CertificateShelley
description: Stake Pool Registration Certificate

8.5. Generate delegation certificate pledge

To honor your pledge, create a delegation certificate:

cardano-cli 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 funds from all stake addresses associated with key stake.vkey to the pool belonging to cold key cold.vkey. If there are many staking keys as pool owners in the first step, we need delegation certificates for all of them.

8.6. Submit the pool certificate and delegation certificate to the blockchain

To submit the pool registration certificate and the delegation certificates to the blockchain, include them in one or more transactions. We can use one transaction for multiple certificates, the certificates will be applied in order.

8.7. Draft the transaction

cardano-cli transaction build-raw \
--tx-in <TxHash>#<TxIx> \
--tx-out $(cat payment.addr)+0 \
--invalid-hereafter 0 \
--fee 0 \
--out-file tx.draft \
--certificate-file pool-registration.cert \
--certificate-file delegation.cert

8.8. Calculate the fees

cardano-cli transaction calculate-min-fee \
--tx-body-file tx.draft \
--tx-in-count 1 \
--tx-out-count 1 \
--witness-count 3 \
--byron-witness-count 0 \
--mainnet \
--protocol-params-file protocol.json

For example:

> 184685

Registering a stake pool requires a deposit. This amount is specified in protocol.json. For example, for Shelley Mainnet we have:

“poolDeposit”: 500000000

8.9. Calculate the change for –tx-out

All amounts in Lovelace

expr <UTxO BALANCE> - <poolDeposit> - <TRANSACTION FEE>

8.10. Build the transaction:

cardano-cli transaction build-raw \
--tx-in <TxHash>#<TxIx> \
--tx-out $(cat payment.addr)+<CHANGE IN LOVELACE> \
--invalid-hereafter <TTL> \
--out-file tx.raw \
--certificate-file pool-registration.cert \
--certificate-file delegation.cert

8.11. Sign the transaction:

cardano-cli transaction sign \
--tx-body-file tx.raw \
--signing-key-file payment.skey \
--signing-key-file stake.skey \
--signing-key-file cold.skey \
--mainnet \
--out-file tx.signed

8.12. Submit the transaction:

cardano-cli transaction submit \
--tx-file tx.signed \

8.13. Verify that your stake pool registration was successful

Get Pool ID

cardano-cli stake-pool id --cold-verification-key-file cold.vkey --output-format "hex"

Check for the presence of your poolID in the network ledger state, with:

cardano-cli query ledger-state --mainnet | grep publicKey | grep <poolId>