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Version: Current

Mithril signer node

info

Mithril signer is responsible for producing individual signatures that are collected and aggregated by the Mithril aggregator.

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Mithril networks

Here is an updated list of all Mithril networks, including their configurations and current statuses:

Last update: 07/21/2023

release-mainnet​

Information-
Mithril networkrelease-mainnet
Cardano networkmainnet
Cardano magic id-
SupportedYes ✔️
StatusBeta 🟢
Aggregator endpointhttps://aggregator.release-mainnet.api.mithril.network/aggregator ↗️
Genesis verification keyhttps://raw.githubusercontent.com/input-output-hk/mithril/main/mithril-infra/configuration/release-mainnet/genesis.vkey ↗️
Era reader adapter typecardano-chain
Era reader addresshttps://raw.githubusercontent.com/input-output-hk/mithril/main/mithril-infra/configuration/release-mainnet/era.addr ↗️
Era reader verification keyhttps://raw.githubusercontent.com/input-output-hk/mithril/main/mithril-infra/configuration/release-mainnet/era.vkey ↗️
Build fromLatest release ↗️
caution

In this documentation, we use the following generic identifiers:

  • **YOUR_CARDANO_NETWORK** You need to replace this with the name of the network that runs on your Cardano node (eg, preprod)
  • **YOUR_AGGREGATOR_ENDPOINT** You need to replace this with the endpoint of an aggregator that runs on the Cardano network you are targeting (eg, https://aggregator.release-preprod.api.mithril.network/aggregator)
  • **YOUR_GENESIS_VERIFICATION_KEY** You need to replace this with the genesis verification key URL that runs on the Cardano network you are targeting (eg, https://raw.githubusercontent.com/input-output-hk/mithril/main/mithril-infra/configuration/release-preprod/genesis.vkey)
  • **YOUR_ERA_READER_ADAPTER_TYPE** You need to replace this with the era reader adapter type used by the Mithril network you are targeting (eg, cardano-chain)
  • **YOUR_ERA_READER_ADDRESS** You need to replace this with the era reader address URL used by the Mithril network you are targeting (eg, https://raw.githubusercontent.com/input-output-hk/mithril/main/address.addr)
  • **YOUR_ERA_READER_VERIFICATION_KEY** You need to replace this with the era reader verification key URL used by the Mithril network you are targeting (eg, https://raw.githubusercontent.com/input-output-hk/mithril/main/TEST_ONLY_era.vkey)

Resources​

NodeSource repositoryRust documentationDocker packages
Mithril signer↗️↗️↗️

Pre-requisites​

  • Install the latest stable version of the correctly configured Rust toolchain.

  • Install OpenSSL development libraries. For example, on Ubuntu/Debian/Mint, run apt install libssl-dev.

Download the source file​

You can download the source file from GitHub (HTTPS):

git clone https://github.com/input-output-hk/mithril.git

Or (SSH):

git clone git@github.com:input-output-hk/mithril.git

Switch to the desired branch/tag:

# Replace **YOUR_BUILD_BRANCH_OR_TAG** with the appropriate branch or tag name
# Please refer to the **Build from** column of the **Mithril networks** table above
git checkout **YOUR_BUILD_BRANCH_OR_TAG**

Change the directory:

cd mithril/mithril-signer

Development testing and building​

Run tests:

make test

Create the help menu:

make help

Generate the Rust documentation:

make doc

Run in debug mode with the default configuration:

make debug

Release the build and run the binary​

To build and run in release mode with the default configuration:

make run

Or, you can build only in release mode:

make build

Display the help menu:

./mithril-signer --help

You should see:

An implementation of a Mithril signer

Usage: mithril-signer [OPTIONS]

Options:
  -r, --run-mode <RUN_MODE>
          Run Mode [env: RUN_MODE=] [default: dev]
  -v, --verbose...
          Verbosity level, add more v to increase
  -c, --configuration-dir <CONFIGURATION_DIR>
          Directory where the configuration file is located [default: ./config]
      --disable-digests-cache
          Disable immutables digests cache
      --reset-digests-cache
          If set the existing immutables digests cache will be reset
  -h, --help
          Print help information (use `--help` for more detail)
  -V, --version
          Print version information

Run in release mode with the default configuration:

./mithril-signer

Run in release mode using a specific mode:

./mithril-signer -r preview

Run in release mode with a custom configuration using environment variables:

NETWORK=**YOUR_CARDANO_NETWORK** AGGREGATOR_ENDPOINT=**YOUR_AGGREGATOR_ENDPOINT** ./mithril-signer
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If you wish to delve deeper and access several levels of logs from the Mithril signer, use the following:

  • Add -v for some logs (WARN)
  • Add -vv for more logs (INFO)
  • Add -vvv for even more logs (DEBUG)
  • Add -vvvv for all logs (TRACE)

Download the pre-built binary​

Each Release / Pre-Release distribution comes with pre compiled binaries ready to use or wrapped in a debian package for linux¹.

You can download them from the Release / Pre-Release distribution page that depends on the Mithril Network you are targeting.

These links are available in the Build From column of the above Mithril Networks table.

¹ The Linux binaries target glibc, and have a minimum requirement of glibc 2.31 (compatible with Ubuntu 20.04 or Debian Bullseye).

Build and run a Docker container​

Build a local Docker image:

make docker-build

Run a local Docker container:

make docker-run

Configuration parameters​

The configuration parameters can be set in either of the following ways:

  1. In a configuration file, depending on the --run-mode parameter. If the runtime mode is testnet, the file is located in ./conf/testnet.json.
  2. The value can be overridden by an environment variable with the parameter name in uppercase.

Here is a list of the available parameters:

ParameterCommand line (long)Command line (short)Environment variableDescriptionDefault valueExampleMandatory
verbose--verbose-vVERBOSEVerbosity level-Parsed from the number of occurrences: -v for Warning, -vv for Info, -vvv for Debug and -vvvv for Trace✔️
run_mode--run-mode-rRUN_MODERuntime modedev-✔️
db_directory--db-directory-DB_DIRECTORYDirectory to snapshot from the Cardano node/db-✔️
network--NETWORKCardano network-testnet or mainnet or devnet✔️
network_magic--NETWORK_MAGICCardano network magic number (for testnet and devnet)-1097911063 or 42-
party_id--PARTY_IDParty Id of the signer, usually the Pool Id of the SPO-pool1pxaqe80sqpde7902er5kf6v0c7y0sv6d5g676766v2h829fvs3x-
run_interval--RUN_INTERVALInterval between two runtime cycles in ms-60000✔️
aggregator_endpoint--AGGREGATOR_ENDPOINTAggregator node endpoint-https://aggregator.pre-release-preview.api.mithril.network/aggregator✔️
data_stores_directory--DATA_STORES_DIRECTORYDirectory to store signer data (stake, protocol initializers, ...)-./mithril-signer/stores✔️
store_retention_limit--STORE_RETENTION_LIMITMaximum number of records in stores. If not set, no limit is set.---
kes_secret_key_path--KES_SECRET_KEY_PATHPath to the Cardano KES secret key file. Mandatory in Pool Id certification mode where the owner is verified (experimental, soon to be stable & preferred mode)---
operational_certificate_path--OPERATIONAL_CERTIFICATE_PATHPath to the Cardano operational certificate file. Mandatory in Pool Id certification mode where the owner is verified (experimental, soon to be stable & preferred mode)---
era_reader_adapter_type--era-reader-adapter-type-ERA_READER_ADAPTER_TYPEEra reader adapter type that can be cardano-chain, file or bootstrap.bootstrap--
era_reader_adapter_params--era-reader-adapter-params-ERA_READER_ADAPTER_PARAMSEra reader adapter params that is an optional JSON encoded parameters structure that is expected depending on the era_reader_adapter_type parameter---