Oura Script Sink

Standalone Cardano scripts live dumper using Oura as a library.

For now, simple scripts, also called native scripts, are supported, Plutus scripts are not.

This is useful, among other things, to gather all minting policies.

Usage

USAGE:
    oura-script-sink [OPTIONS] <--host <HOST>|--socket <SOCKET>>

OPTIONS:
    -h, --host <HOST>          Cardano node hostname or IP address
        --help                 Print help information
    -m, --metrics <METRICS>    Enable Prometheus metrics
                                ('default' for 127.0.0.1:9188/metrics or ADDR:PORT/ENDPOINT)
    -n, --network <NETWORK>    Network ('mainnet', 'testnet' or magic) [default: mainnet]
    -o, --output <OUTPUT>      Output directory [default: /tmp/scripts]
    -p, --port <PORT>          Cardano node port [default: 3001]
    -s, --socket <SOCKET>      Cardano node socket path
    -v, --verbose              Print scripts on standard output
    -V, --version              Print version information

For example, assuming a Cardano node running locally with its socket path set to path/to/socket:

$ oura-script-sink --socket path/to/socket --verbose

With Prometheus metrics and no output (daemon mode):

$ oura-script-sink --socket path/to/socket --metrics 0.0.0.0:9188/metrics

Or connecting to a remote node with local metrics:

$ oura-script-sink --host relays-new.cardano-mainnet.iohk.io --metrics default

Output

Scripts are written to <OUTPUT>/<PREFIX>/<POLICY_ID.json>.

<PREFIX> subdirectories are the first two characters of the policy IDs and are used to spread the number of files per directory.

Starting slot & stateful cursor

By default, the process will start crawling from the first Mary era block then regularly store its "position" using an Oura cursor to avoid reprocessing all blocks on restart.

The cursor file is <OUTPUT>/cursor and can be preset to start at a different initial block. The format is BLOCK_NUMBER,BLOCK_HASH without line feed character.

Snapshot

A snaphot with cursor is available at pool-pm/cardano-minting-policies to sync faster to Cardano tip.

Metrics

Metrics in Prometheus format can be exposed using the -m, --metrics option.

Metrics are disabled by default and --metrics default will enable them on 127.0.0.1:9188/metrics, which will usually make them available only locally. Use 0.0.0.0:9188/metrics instead to make them available from any network interface.

Example:

$ curl localhost:9188/metrics

# HELP chain_tip the last detected tip of the chain (height)
# TYPE chain_tip gauge
chain_tip 7106324
# HELP rollback_count number of rollback events occurred
# TYPE rollback_count counter
rollback_count 1
# HELP sink_current_slot last slot processed by the sink of the pipeline
# TYPE sink_current_slot gauge
sink_current_slot 58001490
# HELP sink_event_count number of events processed by the sink of the pipeline
# TYPE sink_event_count counter
sink_event_count 8592
# HELP source_current_height last height (block #) processed by the source of the pipeline
# TYPE source_current_height gauge
source_current_height 7105148
# HELP source_current_slot last slot processed by the source of the pipeline
# TYPE source_current_slot gauge
source_current_slot 58001512
# HELP source_event_count number of events processed by the source of the pipeline
# TYPE source_event_count counter
source_event_count 730951

Build

$ git clone git@github.com:SmaugPool/oura-script-sink.git

$ cd oura-script-sink
$ cargo install --path .

Support

You can get support in pool.pm Telegram group.

License

This project is licensed under the Apache-2.0 license. Please see the LICENSE file for more details.