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Coreum Blockchain

Coreum addresses the existing limitations of the current blockchains and empowers a solid foundation for future decentralized projects. Coreum’s unique approach is to provide built-in, on-chain solutions to process transactions in a deterministic way to ensure fast, secure, cheap and a green network for a variety of use-cases.

The chain is designed to solve real-world problems at scale by providing native token management systems and Decentralized Exchange (DEX), while being fully decentralized. In addition to the built-on-chain solutions, Coreum uses WebAssembly (WASM) to process smart contracts, and utilizes the Tendermint Byzantine Fault Tolerance (BFT) consensus mechanism and Cosmos SDK’s proven Bonded Proof of Stake (BPoS).

Read more on our website and documentation portal.

Binaries

We share different binaries to be downloaded from our Releases page:

  • cored-linux-[amd64 | arm64] - fully featured node & client binaries compiled for linux (supports Ledger devices).
  • cored-client-darwin-[amd64 | arm64] - client-only binaries for Darwin, which might be used to prepare and send transactions but not to run the node. This binary does not support Ledger devices

Build and Play

Coreum blockchain is under development and all the features are going to be added progressively over time. Everyone is encouraged to run a chain locally for development and testing purposes.

Entire process of running local chain is automated by our tooling. The only prerequisites are:

  • docker installed from your favorite package manager
  • go 1.21 or newer installed and available in your PATH

Build binaries

Steps to build required binaries:

  1. Clone this repository
$ git clone https://github.com/CoreumFoundation/coreum
$ cd coreum
  1. Compile the cored binary:
$ make build

After the command completes you may find executable ./bin/cored, being both blockchain node and client.

Start local chain

To start local Coreum blockchain execute:

$ make znet-start

After a while 3 cored validators will be deployed to your docker.

To stop and purge the testing environment run:

$ make znet-remove

To get all the details on how znet tool might be used, go to the crust repository.

Interact with the local chain

After entering znet console by executing:

$ make znet

you may use client to interact with the chain: 1. 2. List pregenerated wallets:

(znet) [znet] $ cored-00-val keys list

You may use those wallets to issue transactions and queries

  1. Generate a Wallet and Query balances:
(znet) [znet] $ cored-00-val keys add {YOUR_WALLET_NAME}

This will generate a wallet and print out the mnemonic at the end. It will also print the address and public key. Use the address in the next commands to query its balance and transfer funds to it.

(znet) [znet] $ cored-00-val q bank balances {YOUR_GENERATED_ADDRESS}

Remember to replace address with the one existing in your keystore.

You will see the balance is zero.

  1. Send tokens from one account to another:
(znet) [znet] $ cored-00-val tx bank send alice {YOUR_GENERATED_ADDRESS} 10udevcore --broadcast-mode=block

Run the query again, and you will see that there are now funds in the newly generated account.

(znet) [znet] $ cored-00-val q bank balances {YOUR_GENERATED_ADDRESS}

Connect to Running Chains

Coreum has mainnet, testnet and devnet chains running. In order to connect to any of those networks, get the network variables from the docs here, and provide the correct node and chain-id flags to the cli command. As an example here is a command to connect to the testnet to get the status:

$ cored status --chain-id=coreum-testnet-1 --node=https://full-node.testnet-1.coreum.dev:26657

It should also be mentioned that for development purposes testnet is more stable than devnet.

You can also find block explorers for each chain by this link.