Configuring Slot Leader Calculations

if [[ ! -d "$DIRECTORY/logs" ]]; then mkdir $DIRECTORY/logs; fi

# create a pid, this way you can ps aux | grep leaderScheduleCheck.sh to see if script is running

echo $ > "$DIRECTORY/logs/leaderScheduleCheck.pid";

# Set your own stake pool ID

# Set the network magic value as needed for the testnet environment that you want to use

# For details on available testnet environments, see https://book.world.dev.cardano.org/environments.html

# Edit variable with $TESTNET for Testnet and $MAINNET for Mainnet

# check for vrf.skey presence

if [[ ! -f "$DIRECTORY/vrf.skey" ]]; then echo "vrf.skey not found"; exit 127; fi

CCLI=$(which cardano-cli)

if [[ -z $CCLI ]]; then echo "cardano-cli command cannot be found, exiting..."; exit 127; fi

if [[ -z $JQ ]]; then echo "jq command cannot be found, exiting..."; exit 127; fi

read -ra BYRON_GENESIS <<< "$(jq -r '[ .startTime, .protocolConsts.k, .blockVersionData.slotDuration ] |@tsv' < $DIRECTORY/$network-byron-genesis.json)"

if [[ -z $BYRON_GENESIS ]]; then echo "BYRON GENESIS config file not loaded correctly"; exit 127; fi

if [ $network = $TESTNET ]; then

network_magic="--testnet-magic $MAGICNUMBER"

elif [ $network = $MAINNET ]; then

network_magic="--mainnet"

echo "Incorrect network selected, please use $TESTNET or $MAINNET network type"; exit 1

# Check that node is synced

sync_progress=$($CCLI query tip $network_magic | jq -r ".syncProgress")

if [[ $sync_progress == "100.00" ]]; then

function getCurrentEpoch(){

echo $($CCLI query tip $network_magic | jq -r ".epoch")

# Get epoch start time based on current one

function getEpochStartTime(){

byron_genesis_start_time=${BYRON_GENESIS[0]}

byron_k=${BYRON_GENESIS[1]}

byron_epoch_length=$(( 10 * byron_k ))

byron_slot_length=${BYRON_GENESIS[2]}

echo $(( $byron_genesis_start_time + (($(getCurrentEpoch) * $byron_epoch_length * $byron_slot_length) / 1000) ))

# Get epoch end time based on the current one

function getEpochEndTime(){

#calculate currentEpoch Start time + 5 days of epoch duration - 10 minutes(600s) to not overlap with next epoch

echo $(( $(getEpochStartTime)+(5*86400)-(600) ))

function getCurrentTime(){

echo $(printf '%(%s)T\n' -1)

# Convert timestamps to UTC time

function timestampToUTC(){

echo $(date +"%D %T" -ud @$timestamp)

# Find the correct time to run the leaderslot check command

function getLeaderslotCheckTime(){

epochStartTime=$(getEpochStartTime)

epochEndTime=$(getEpochEndTime)

# epoch completion percent to check for --next epoch leaderslots

checkTimestamp=$(( $epochStartTime+($percentage*($epochEndTime-$epochStartTime)/100) ))

# Function to make the script sleep until check need to be executed

if [[ $sleepSeconds -gt 0 ]]; then

echo "Script is going to sleep for: $sleepSeconds seconds"

# Check leaderschedule of next epoch

function checkLeadershipSchedule(){

next_epoch=$(( $(getCurrentEpoch)+1 ))

currentTime=$(getCurrentTime)

echo "Check is running at: $(timestampToUTC $currentTime) for epoch: $next_epoch"

$CCLI query leadership-schedule $network_magic --genesis "$DIRECTORY/$network-shelley-genesis.json" --stake-pool-id $STAKE_POOL_ID --vrf-signing-key-file "$DIRECTORY/vrf.skey" --next > "$DIRECTORY/logs/leaderSchedule_$next_epoch.txt"

echo "Current epoch: $(getCurrentEpoch)"

epochStartTimestamp=$(getEpochStartTime)

echo "Epoch start time: $(timestampToUTC $epochStartTimestamp)"

epochEndTimestamp=$(getEpochEndTime)

echo "Epoch end time: $(timestampToUTC $epochEndTimestamp)"

currentTime=$(getCurrentTime)

echo "Current cron execution time: $(timestampToUTC $currentTime)"

timestampCheckLeaders=$(getLeaderslotCheckTime)

echo "Next check time: $(timestampToUTC $timestampCheckLeaders)"

timeDifference=$(( $timestampCheckLeaders-$currentTime ))

if [ -f "$DIRECTORY/logs/leaderSchedule_$(( $(getCurrentEpoch)+1 )).txt" ]; then

echo "Check already done, check logs for results"; exit 1

elif [[ $timeDifference -gt 86400 ]]; then

echo "Too early to run the script, wait for next cron scheduled job"; exit 1

elif [[ $timeDifference -gt 0 ]] && [[ $timeDifference -le 86400 ]]; then

sleepUntil $timeDifference

echo "Check is starting on $(timestampToUTC $(getCurrentTime))"

echo "Script ended, schedule logged inside file: leaderSchedule_$(( $(getCurrentEpoch)+1 )).txt"

elif [[ $timeDifference -lt 0 ]] && [ ! -f "$DIRECTORY/logs/leaderSchedule_$(( $(getCurrentEpoch)+1 )).txt" ]; then

echo "Check is starting on $(timestampToUTC $(getCurrentTime))"

echo "Script ended, schedule logged inside file: leaderSchedule_$(( $(getCurrentEpoch)+1 )).txt"

echo "There were problems on running the script, check that everything is working fine"; exit 1

echo "Node not fully synced."; exit 1