Exercise-5-solutions.md

Example Solution for Shelley Stakepool Exercise Sheet 5

LATEST NODE TAG: 1.14.2

Running a Stake Pool

Prerequisites

3. Checkout and build the sources which have been tagged with 1.14.2.

   cabal update
   cd cardano-node
   git fetch --all --tags -f
   git checkout tags/1.14.2
   cabal install cardano-node cardano-cli
   cd ..
   

   Remark: cabal install will symlink the binaries to ~/.cabal/bin, so make sure that folder is in your PATH and takes precedence over other locations where old binaries might be lying around.

4. Make sure you have access to:

   a. One or more funded addresses.

   b. The keys and operational certificate for the stake pool that you set up in Exercise 3.

   c. The stake keys from Exercise 4.

   Let's assume for this solution that we have

   File	Content
   pay.vkey	payment verification key
   pay.skey	payment signing key
   stake.vkey	staking verification key
   stake.skey	staking signing key
   stake	registered stake address
   pay	fundedn address linked to stake
   node.vkey	cold verification key
   node.skey	cold signing key
   node.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

5. Start a relay node.

   wget https://hydra.iohk.io/build/2715059/download/1/shelley_testnet-config.json
   wget https://hydra.iohk.io/build/2715059/download/1/shelley_testnet-genesis.json
   wget https://hydra.iohk.io/build/2715059/download/1/shelley_testnet-topology.json
   
   rm -rf db logs
   
   cardano-node run \
       --topology shelley_testnet-topology.json \
       --database-path db \
       --socket-path db/node-socket \
       --port 8080 \
       --config shelley_testnet-config.json
   
   export CARDANO_NODE_SOCKET_PATH=db/node-socket
   cardano-cli shelley query protocol-parameters \
       --testnet-magic 42 \
       --out-file params.json
   

Exercises

1. Generate a registration certificate for your stake pool:

   cardano-cli shelley stake-pool registration-certificate \
       --cold-verification-key-file node.vkey \
       --vrf-verification-key-file vrf.vkey \
       --pool-pledge 1000000000 \
       --pool-cost 256000000 \
       --pool-margin 0.07 \
       --pool-reward-account-verification-key-file stake.vkey \
       --pool-owner-stake-verification-key-file stake.vkey \
       --out-file pool.cert \
   --testnet-magic 42
   

2. Pledge some stake to your stake pool.

   cardano-cli shelley stake-address delegation-certificate \
       --staking-verification-key-file stake.vkey \
       --stake-pool-verification-key-file node.vkey \
       --out-file deleg.cert
   

3. Register the pool online.

   cardano-cli shelley transaction calculate-min-fee \
       --tx-in-count 1 \
       --tx-out-count 1 \
       --ttl 430000 \
       --testnet-magic 42 \
       --signing-key-file pay.skey \
       --signing-key-file node.skey \
       --signing-key-file stake.skey \
       --certificate pool.cert \
       --certificate deleg.cert \
       --protocol-params-file params.json
   
   > runTxCalculateMinFee: 184377
   
   cat shelley_testnet-genesis.json | grep poolDeposit
   > "poolDeposit": 500000000,
   
   cardano-cli shelley query utxo \
       --testnet-magic 42 \
       --address
   
   cardano-cli shelley query utxo \
       --address $(cat pay) \
       --testnet-magic 42
   
                    TxHash                       TxIx        Lovelace
   --------------------------------------------------------------------
   8aba76...                                        0       99999255886
   92d4ff...                                        0      899498750011
   
   expr 99999255886 - 500000000 - 184377
   > 99499071509
   
   cardano-cli shelley transaction build-raw \
       --tx-in 8aba76...#0 \
       --tx-out $(cat pay)+99499071509 \
       --ttl 430000 \
       --fee 184377 \
       --tx-body-file tx.raw \
       --certificate pool.cert \
       --certificate deleg.cert
   
   cardano-cli shelley transaction sign \
       --tx-body-file tx.raw \
       --signing-key-file pay.skey \
       --signing-key-file node.skey \
       --signing-key-file stake.skey \
       --testnet-magic 42 \
       --tx-file tx.signed
   
   cardano-cli shelley transaction submit \
       --tx-file tx.signed \
       --testnet-magic 42