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Welcome to the Cardano Playground Repository

Cardano is a decentralized third-generation proof-of-stake blockchain platform and home to the ada cryptocurrency. It is the first blockchain platform to evolve out of a scientific philosophy and a research-first driven approach.

Things you'll find here:

Documentation

Use the nagivation panel on the left to explore The Cardano Book.



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Environments

The official Cardano Environment configuration files.

Environment description and configuration files available are:

Environment: Preview Testnet

Usage: Testing release candidates and mainnet releases. Leads mainnet hard forks by at least 4 weeks.

Ideally stays long running. Only if an issue is found after it forks that's breaking should it be respun.

Epoch length of 1 day. Development flags allowed in configuration files.

Upgrade Strategy:

  • Release Candidates - 1/3 of nodes
  • Official Releases - 2/3 of nodes
  • Hard forks - all nodes
  • Community requested to only deploy release candidates and official releases

Changes Requested by: Release Squad Lead

Approvals Required: SRE Tribe Lead, Cardano Head of Engineering, Cardano Head of Architecture

Responsible: IOG SRE

Accountable: Head of SRE/Release Squad Lead

Consulted: SPOs

Informed: Cardano Core Tribe, COO, Director of Engineering

Configuration files

Compatible with cardano-node release 10.5.1

NOTE:
The non-block-producer node config has `PeerSharing` enabled by
default, so should not be used with block-producers.

Additionally, avoid connecting a block-producer not using p2p to a p2p
PeerSharing enabled relay as the block-producer's IP will be leaked.

Ouroboros Genesis Mode

Ouroboros genesis mode is now the default consensus mode on preview and preprod testnets starting with node 10.5.0. If needed, use of praos mode and the bootstrap peers found in the above topology file can be reverted to by setting:

  • Node config's ConsensusMode option to a value of PraosMode

UTXO-HD

Users migrating from a node version older than 10.4.1 should also read the 10.4.1 release notes and the consensus migration guide to properly configure the node and convert the database such that a replay from genesis can be avoided.

Guardrails reference script UTxO

For convenience, the guardrails script has been put on a UTxO so that it can be used as reference script in Treasury Withdrawal and Protocol Parameter Change proposals.

Guardrails script address: addr_test1wrazf7es2yngqh8jzexpv8v99g88xvx0nz83le2cea755eqf68ll6 Guardrails script UTxO: f3f61635034140e6cec495a1c69ce85b22690e65ab9553ef408d524f58183649#0

Environment: Pre-Production Testnet

Usage: Testing release candidates and mainnet releases. Forks at approximately same time as mainnet (within an epoch of each other).

Long running. Since this parallels mainnet, if a bug occurs here, it needs fixed properly and can not be respun.

Upgrade Strategy:

  • Release Candidates - 1/3 of nodes
  • Official Releases - 2/3 of nodes
  • Hard forks - all nodes
  • Community requested to only deploy release candidates and official releases

Changes Requested by: Release Squad Lead

Approvals Required: SRE Tribe Lead, Cardano Head of Engineering, Cardano Head of Architecture, CF Representative

Responsible: IOG SRE

Accountable: Head of SRE/Release Squad Lead

Consulted: SPOs, IOG Tribes

Informed: Cardano Core Tribe, COO, Director of Engineering, VP Community

Configuration files

Compatible with cardano-node release 10.5.1

NOTE:
The non-block-producer node config has `PeerSharing` enabled by
default, so should not be used with block-producers.

Additionally, avoid connecting a block-producer not using p2p to a p2p
PeerSharing enabled relay as the block-producer's IP will be leaked.

Ouroboros Genesis Mode

Ouroboros genesis mode is now the default consensus mode on preview and preprod testnets starting with node 10.5.0. If needed, use of praos mode and the bootstrap peers found in the above topology file can be reverted to by setting:

  • Node config's ConsensusMode option to a value of PraosMode

UTXO-HD

Users migrating from a node version older than 10.4.1 should also read the 10.4.1 release notes and the consensus migration guide to properly configure the node and convert the database such that a replay from genesis can be avoided.

Guardrails reference script UTxO

For convenience, the guardrails script has been put on a UTxO so that it can be used as reference script in Treasury Withdrawal and Update Protocol Parameter proposals.

Guardrails script address: addr_test1wrazf7es2yngqh8jzexpv8v99g88xvx0nz83le2cea755eqf68ll6 Guardrails script UTxO: 9aabbac24d1e39cb3e677981c84998a4210bae8d56b0f60908eedb9f59efffc8#0

Environment: Production (Mainnet)

Usage: Live Production. Only gets official mainnet releases.

Upgrade Strategy:

  • Official Releases - Deploy 1 pool and it's relays every 24 hours
  • Community requested to only deploy official releases

Changes Requested by: Release Squad Lead

Approvals Required: SRE Tribe Lead, IOG Executive Team, CF Executive Team

Responsible: IOG SRE Accountable: Head of SRE/Release Squad Lead

Consulted: SPOs, IOG Tribes, IOG Executive Team

Informed: Cardano Core Tribe, COO, IOG Director of Engineering, IOG VP Community

Configuration files

Compatible with cardano-node release 10.5.1

NOTE:
The non-block-producer node config has `PeerSharing` enabled by
default, so should not be used with block-producers.

Additionally, avoid connecting a block-producer not using p2p to a p2p
PeerSharing enabled relay as the block-producer's IP will be leaked.

Ouroboros Genesis Mode

For those preferring to use Genesis mode over bootstrap peers, the following requirements will also need to be met:

  • The node config file will need to have ConsensusMode set to GenesisMode

  • To the topology file, a new key of peerSnapshotFile will need to be added and set to the path of the peer snapshot file, provided above. The declared path can be absolute or relative with respect to the directory of the topology file.

UTXO-HD

Users migrating from a node version older than 10.4.1 should also read the 10.4.1 release notes and the consensus migration guide to properly configure the node and convert the database such that a replay from genesis can be avoided.

Guardrails reference script UTxO

For convenience, the guardrails script has been put on a UTxO so that it can be used as reference script in Treasury Withdrawal and Protocol Parameter Change proposals.

Guardrails script address: addr1w8azf7es2yngqh8jzexpv8v99g88xvx0nz83le2cea755eqjjnrsl Guardrails script UTxO: dc06746a898fd230f164f47a3d749348b65655b8fb388ff275f54d62891653e2#0

Advanced Configurations

Pre-release configurations for select cardano environments can be found here.

Advanced environment configuration files available are:

Advanced Configuration: Preview Testnet

There is currently no pre-release version available for the preview environment.

The latest version available is cardano-node release 10.5.1.

Configuration files

Compatible with cardano-node release 10.5.1

NOTE:
The non-block-producer node config has `PeerSharing` enabled by
default, so should not be used with block-producers.

Additionally, avoid connecting a block-producer not using p2p to a p2p
PeerSharing enabled relay as the block-producer's IP will be leaked.

Ouroboros Genesis Mode

Ouroboros genesis mode is now the default consensus mode on preview and preprod testnets starting with node 10.5.0. If needed, use of praos mode and the bootstrap peers found in the above topology file can be reverted to by setting:

  • Node config's ConsensusMode option to a value of PraosMode

UTXO-HD

Users migrating from a node version older than 10.4.1 should also read the 10.4.1 release notes and the consensus migration guide to properly configure the node and convert the database such that a replay from genesis can be avoided.

Guardrails reference script UTxO

For convenience, the guardrails script has been put on a UTxO so that it can be used as reference script in Treasury Withdrawal and Protocol Parameter Change proposals.

Guardrails script address: addr_test1wrazf7es2yngqh8jzexpv8v99g88xvx0nz83le2cea755eqf68ll6 Guardrails script UTxO: f3f61635034140e6cec495a1c69ce85b22690e65ab9553ef408d524f58183649#0

Advanced Configuration: Pre-Production Testnet

There is currently no pre-release version available for the preview environment.

The latest version available is cardano-node release 10.5.1.

Configuration files

Compatible with cardano-node release 10.5.1

NOTE:
The non-block-producer node config has `PeerSharing` enabled by
default, so should not be used with block-producers.

Additionally, avoid connecting a block-producer not using p2p to a p2p
PeerSharing enabled relay as the block-producer's IP will be leaked.

Ouroboros Genesis Mode

Ouroboros genesis mode is now the default consensus mode on preview and preprod testnets starting with node 10.5.0. If needed, use of praos mode and the bootstrap peers found in the above topology file can be reverted to by setting:

  • Node config's ConsensusMode option to a value of PraosMode

UTXO-HD

Users migrating from a node version older than 10.4.1 should also read the 10.4.1 release notes and the consensus migration guide to properly configure the node and convert the database such that a replay from genesis can be avoided.

Guardrails reference script UTxO

For convenience, the guardrails script has been put on a UTxO so that it can be used as reference script in Treasury Withdrawal and Update Protocol Parameter proposals.

Guardrails script address: addr_test1wrazf7es2yngqh8jzexpv8v99g88xvx0nz83le2cea755eqf68ll6 Guardrails script UTxO: 9aabbac24d1e39cb3e677981c84998a4210bae8d56b0f60908eedb9f59efffc8#0

Plutus Cost Model

Plutus cost model updates available are:

Plutus Cost Model: 2024-07-30

Environments updated:

  • Mainnet
  • Preprod
  • Preview

Configuration: link

Plutus Cost Model: 2023-02-14

Environments updated:

  • Mainnet
  • Preprod
  • Preview

Configuration: link

Plutus Cost Model: 2022-11-05

Environments updated:

  • Preview

Configuration: link

Plutus Cost Model: 2022-07-01

Environments updated:

  • Mainnet
  • Preprod

Configuration: link