In a community effort, led by Andrew Westberg [BCSH], we implemented a way to retrieve stakepool slot leader logs.

This is a nodejs + python implementation which was tested on Ubuntu 20.04.

Note: this method only works for current epoch block assignments. Calculating next epochs assignments based on next epoch's nonce is not supported.

Japanese README: https://github.com/btbf/cardano-leader-logs (outdated)

curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -
sudo apt-get update
sudo apt-get install -y nodejs

export NODE_PATH=/usr/lib/node_modules/

sudo apt-get update
sudo apt-get install -y software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install -y python3.9
sudo apt-get install -y python3-pip

python3 --version
pip3 --version

pip3 install pytz

git clone https://github.com/input-output-hk/libsodium
cd libsodium
git checkout 66f017f1
./autogen.sh
./configure
make
sudo make install

The node does not need to run as a block producer as long as it has access to the correct vrf.skey.

Add your poolId, the path to your pool vrf.skey, and paths for both node genesis files (Shelley and Byron). Make sure to have the node stats available as seen below (or put your own port). The path to the cardano-cli could be a cardano-cli or ./cardano-cli depending on how you installed the CLI previously.

{
  "poolId":           "<YOUR_POOL_ID>",
  "vrfSkey":          "vrf.skey", // path to pool's VRF signing key

  "genesisShelley":   "../files/genesis.json", // path to Shelley genesis file
  "genesisByron":     "../files/byron-genesis.json", // path to Byron genesis file

  "libsodiumBinary":  "/usr/local/lib/libsodium.so", // path to Libsodium executable
  "cardanoCLI":       "cardano-cli", // path to cardano-cli executable
  "nodeStatsURL":     "http://127.0.0.1:12798/metrics", // location for node stats (from the node's `config.json`)

  "timeZone":         "Europe/London" // timezone to be used to display the block schedule in
}

To manually retrieve the epoch nonce (required for block schedule calculation):

cardano-cli query protocol-state --mainnet | jq -r .csTickn.ticknStateEpochNonce.contents

0022cfa563a5328c4fb5c8017121329e964c26ade5d167b1bd9b2ec967772b60

1. Through the provided runLeaderLogs.sh: By default, this script will look for the slotLeaderLogsConfig.json in the same directory -> this can be edited inside the script to specify another location for the config file:

SLOTLEADER_CONFIG="slotLeaderLogsConfig.json" # path to configuration file

./runLeaderLogs.sh

...

      Calculating leader slots...

expected blocks with d == 0.00: xy
assigned blocks with d == 0.00: xyz

[
  { index: 1, slot: 6354, date: '2021-06-25 00:30:45' }
  ...
]

2. Manually, by running:

node cardanoLeaderLogs.js path/to/slotLeaderLogsConfig.json epochNonceHash

Thanks to Andrew Westberg [BCSH], Papacarp [LOVE] and others who contributed.

This repository was created by Marcel Baumberg [TITAN] and is now maintained by Damjan Ostrelic [EDEN].