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Register Stake Address on the Blockchain

Stake address needs to be registered on the blockchain to be useful. Registering keys requires:

  • Create a registration certificate.
  • Submit the certificate to the blockchain with a transaction.

Create a registration certificate#

cardano-cli stake-address registration-certificate \--stake-verification-key-file stake.vkey \--out-file stake.cert

Draft transaction#

For the transaction draft, --tx.out, --invalid-hereafter and --fee can be set to zero.

cardano-cli transaction build-raw \--tx-in b64ae44e1195b04663ab863b62337e626c65b0c9855a9fbb9ef4458f81a6f5ee#1 \--tx-out $(cat payment.addr)+0 \--invalid-hereafter 0 \--fee 0 \--out-file tx.draft \--certificate-file stake.cert

Calculate fees#

cardano-cli transaction calculate-min-fee \--tx-body-file tx.draft \--tx-in-count 1 \--tx-out-count 1 \--witness-count 2 \--byron-witness-count 0 \--mainnet \--protocol-params-file protocol.json

The output is the transaction fee in lovelace:

> 171485

Registering the stake address, not only pay transaction fees, but also includes a deposit (which you get back when deregister the key) as stated in the protocol parameters:

The deposit amount can be found in the protocol.json under keyDeposit, for example in Shelley Mainnet:

..."keyDeposit": 2000000,...

Query the UTXO of the address that pays for the transaction and deposit:

cardano-cli query utxo \    --address $(cat payment.addr) \    --mainnet
>                            TxHash                                 TxIx      Amount> ----------------------------------------------------------------------------------------> b64ae44e1195b04663ab863b62337e626c65b0c9855a9fbb9ef4458f81a6f5ee     1      1000000000 lovelace

Calculate the change to send back to payment address after including the deposit#

expr 1000000000 - 171485 - 2000000
> 997828515

Submit the certificate with a transaction:#

Build the transaction, this time include --invalid-hereafter and --fee

cardano-cli transaction build-raw \--tx-in b64ae44e1195b04663ab863b62337e626c65b0c9855a9fbb9ef4458f81a6f5ee#1 \--tx-out $(cat payment.addr)+997828515 \--invalid-hereafter 987654 \--fee 171485 \--out-file tx.raw \--certificate-file stake.cert

Sign it:

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

And submit it:

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

Your stake key is now registered on the blockchain.


--mainnet identifies the Cardano mainnet, for testnets use --testnet-magic 1097911063 instead.