Developer Environment

To develop Dogecoin applications to be deployed on ICP, your local developer environment will need to include:

• A local Dogecoin regtest node.

• The Rust toolchain for installing Rust crates and compiling Rust code.

• The IC SDK for creating, deploying, and managing canisters. You can install it natively on macOS and Linux; however, Windows users will need to set up WSL 2 before installing the IC SDK.

Create a local Dogecoin network (regtest) with dogecoind

It is recommended to set up a local Dogecoin regtest network to mine blocks quickly and at will, which facilitates testing various cases without having to rely on the Dogecoin mainnet where blocks are produced every minute on average.

• Step 1: Download Dogecoin Core.

Example for a Linux machine:

# Download the binary
curl -L -O https://github.com/dogecoin/dogecoin/releases/download/v1.14.9/dogecoin-1.14.9-x86_64-linux-gnu.tar.gz

# Unpack
tar -xvf dogecoin-1.14.9-x86_64-linux-gnu.tar.gz

# Add binaries to the PATH environment variable
export PATH="$(pwd)/dogecoin-1.14.9/bin:$PATH"

• Step 2: Create a subdirectory for Dogecoin data.

This should be created in the project folder root. This allows you to run different local Dogecoin regtest networks for different projects.

mkdir dogecoin_data

• Step 3: Create a file called dogecoin.conf.

cat > dogecoin_data/dogecoin.conf <<EOF
regtest=1
txindex=1
rpcuser=ic-doge-integration
rpcpassword=QPQiNaph19FqUsCrBRN0FII7lyM26B51fAMeBQzCb-E=
rpcauth=ic-doge-integration:cdf2741387f3a12438f69092f0fdad8e\$62081498c98bee09a0dce2b30671123fa561932992ce377585e8e08bb0c11dfa
EOF

Explanation of settings:

• regtest=1: Enables Dogecoin’s regression test mode for local testing.

• txindex=1: Maintains a full transaction index to support lookups by transaction ID.

• rpcuser=ic-doge-integration: Sets a default username for JSON-RPC authentication.

• rpcpassword=QPQ…b-E=: Sets the password for JSON-RPC authentication.

• rpcauth=ic-doge-integration:cdf…dfa: Uses an alternative authentication method for RPC, combining the username and a salted hash.

Find more details about the dogecoin.conf settings in the Dogecoin Core Daemon documentation.

• Step 4: Run dogecoind to start the Dogecoin client.

dogecoind -datadir=$(pwd)/dogecoin_data -printoconsole --port=18444 

This command assumes that port 18444 on your machine is available. If it isn't, change the specified port accordingly.