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75 lines
4.5 KiB
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75 lines
4.5 KiB
Markdown
---
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title: Testnets
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description: An overview of public test networks that you can test Ocean Protocol applications against.
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---
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You can test an Ocean Protocol application (such as a marketplace) against the test networks (testnets) described below.
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## The Kovan Testnet
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The [Kovan Testnet](https://github.com/kovan-testnet/proposal) (or just "Kovan") is a public Ethereum testnet operated by members of the Ethereum community.
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### Kovan Blockchain Explorers
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There are some Kovan blockchain explorers, e.g. [Etherscan for Kovan](https://kovan.etherscan.io/) and [BlockScout for Kovan](https://blockscout.com/eth/kovan). You can use those to check the status of a transaction, the balance of an account, and more.
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### Keeper Contracts on Kovan
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The Ocean Protocol [keeper contracts](https://github.com/oceanprotocol/keeper-contracts) (smart contracts) are deployed on Kovan. In fact, several versions of the keeper contracts have been deployed there. You can find the addresses of recently-deployed keeper contracts (including the OceanToken contract) as follows:
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1. Go to [the list of keeper-contracts releases (Git tags) on GitHub](https://github.com/oceanprotocol/keeper-contracts/releases).
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1. Click on the name of a release's Git tag in the left sidebar. It will look something like `v0.8.3`.
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1. Scroll down to the **Kovan Testnet** section of the README.md file. The contract addresses are listed there. Note: Sometimes there is a disconnect between the release number and the listed version number.
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Note: Because Ocean Protocol uses ZeppelinOS to manage smart contract upgrades, a keeper contract address might not change over time (because it's just the address _of the proxy contract_) but the actually-used smart contract might change, along with its functionality.
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### Ocean Components Connected to Kovan
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There is a [Secret Store](/concepts/components/#secret-store) connected to the Kovan Testnet for use by Ocean Protocol projects (including your projects). It's operated by BigchainDB GmbH. Its URL is:
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[https://secret-store-kovan.dev-ocean.com/](https://secret-store-kovan.dev-ocean.com/)
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Aside from the Secret Store, there is no other Ocean Protocol software component (e.g. Aquarius) that is live, connected to the Kovan testnet, and operated by BigchainDB GmbH.
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## The Nile Testnet
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_Formerly called the Ocean POA Testnet._
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The Nile Testnet is similar to the Kovan Testnet, except all the nodes are operated by BigchainDB GmbH.
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If you want to connect to the Nile Testnet e.g. using MetaMask, then you must enter an "RPC URL" for the Nile Testnet. It is:
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[https://nile.dev-ocean.com/](https://nile.dev-ocean.com/)
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(You don't need to include the port number.)
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### Nile Blockchain Explorers
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There is a Nile blockchain explorer at [https://submarine.dev-ocean.com/](https://submarine.dev-ocean.com/). You can use it to check the status of a transaction, the balance of an account, and more. It uses the following symbols for Nile Ether and Ocean Tokens:
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Cryptocurrency | Symbol used
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------------------|------------
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Nile Ether | POA
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Nile Ocean Tokens | SBT-OCN
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### Keeper Contracts on Nile
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See the subsection about the [Keeper Contracts on Kovan](#keeper-contracts-on-kovan). The Nile contract addresses can be found in the same way.
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### Ocean Components Connected to Nile
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There are several Ocean Protocol software components that are live, connected to the Nile testnet, and operated by BigchainDB GmbH:
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- Secret Store at [https://secret-store.dev-ocean.com](https://secret-store.dev-ocean.com)
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- Aquarius at [https://nginx-aquarius.dev-ocean.com](https://nginx-aquarius.dev-ocean.com)
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- Brizo at [https://nginx-brizo.dev-ocean.com](https://nginx-brizo.dev-ocean.com)
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- Jupyter Hub at [https://mantaray.dev-ocean.com](https://mantaray.dev-ocean.com)
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- [Token Bridge Frontend](https://github.com/oceanprotocol/bridge-ui) (for a token bridge between Nile and Kovan) at [https://token-bridge.dev-ocean.com](https://token-bridge.dev-ocean.com)
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> Internal note: The private "atlantic" repo documents the internal details of the Nile testnet in `networks/nile/README.md`.
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## A Spree Testnet
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When Ocean Protocol developers run [Barge](https://github.com/oceanprotocol/barge) with the `--local-spree-node` option, a "Spree Testnet" node is deployed on their local machine: a local "testnet" not connected to any public testnet. It's named after the main river flowing through Berlin, Germany, where many Ocean Protocol developers are located.
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Spree testnet details can be found in the [Barge README.md file](https://github.com/oceanprotocol/barge/blob/develop/README.md).
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