Local Testnet Tools ​

Local RPC Node Setup ​

For developers and enterprise partners requiring high throughput, low latency, or enhanced privacy, we recommend setting up a Local RPC Node. Running a local node allows your applications to communicate directly with the DAC Inception Testnet Blockchain without relying on the public gateway.

Configuration & CORS Settings ​

To allow web-based applications (like your frontend dApp or a local Blockscout instance) to interact with your node, you must properly configure CORS (Cross-Origin Resource Sharing).

When launching your dacnode, use the following flags:

  • HTTP RPC Flag: --http

  • CORS Configuration: --http.corsdomain "*"

    Note: For production environments, replace "*" with your specific domain (e.g., "https://app.dacdeveloper.com") to enhance security.

  • RPC APIs: --http.api "eth,net,web3,txpool"

  • RPC Port: --http.port 8545

Step-by-Step Instructions ​

  1. Installation: Download the latest DAC Node binary from our official repository.

  2. Execution: Run the node with the CORS flags enabled:

    ./dacnode --testnet --datadir ./data --http --http.addr 0.0.0.0 --http.port 8545 --http.corsdomain "*" --http.api "eth,net,web3"

  3. Verification: Test your local RPC connection using curl:

    curl -X POST http://localhost:8545 \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Why use a Local RPC? ​

  • No Rate Limits: Unlimited requests for indexing data or heavy smart contract calls.
  • Security: Your private keys used in local scripts never leave your infrastructure.
  • Reliability: Independence from the public infrastructure's availability during peak traffic.