Change truffle develop port

Question

When I run truffle develop it starts a testnet listening at localhost:9545. Is there a way to change the port this testnet is running on? EDIT: I'm not looking for a way to configure which network truffle connects to. I'm trying to run truffle's development testnet on another port than 9545, which it takes by default. The reason is that it would make it easier to run the code on TestRPC as well.

Answer 1

You could also add another network to your truffle.js file. Something like this:

networks: {
  development: {
    host: "localhost",
    port: 9545,
    network_id: "*" // match any network
  },
  mynetwork: {
    host: "localhost",
    port: 8545,
    network_id: "*" // match any network
  },
}

Now you can run truffle migrate --network mynetwork. Like this, the contracts will be migrated to testrpc.

Answer 2

I had the same question. If anyone else does, here is what worked for me: You can use ganache-cli to create a test blockchain and then truffle migrate to connect to it, the same way truffle develop does it under the hood.

Create custom test blockchain:

$ npm install -g ganache-cli
$ ganache -p 9546 # custom port 9546

And then in truffle.js add this custom network configuration

module.exports = {
  networks: {
    "customNetwork": {
       network_id: 1,
       host: "127.0.0.1",
       port: 9546 // the port that Ganache-cli exposes
     }
  }
};

Then finally connect truffle to the network and deploy the contracts with

$ truffle console --network customNetwork
truffle(customNetwork)> migrate --reset

I hope this helps

Answer 3

As per the truffle's documentation, truffle develop doesn't read the port from truffle.js file.

This will spawn a development blockchain locally on port 9545, regardless of what your truffle.js configuration file calls for.

Answer 4

I guess you would have found the answer from the comments, the config file is the file named truffle.js which is present in the root directory of the project.

You can change the port and other things from truffle.js. Specifically, port can be changed by:

module.exports = {
  networks: {
    development : {
      host : "localhost",
      from: <Some_address>,
      port: 9545,
      gasPrice: 12,
      gas: 4700000
    }
  }
};

Answer 5

I had the same problem :) Because I wanted to see the logs, I needed to use my local network and the result of running following command: "truffle develop", will start tests on their default develop environment. So that what happened to you is the expected behavior. :)

This is how you could run it on your desired network:

This is the content of truffle.js file:

    module.exports = {
  networks: {
    development: {
      host: 'localhost',
      port: 8545,
      network_id: '*', // Match any network id
      gasPrice: 20000000000 // Same value as `truffle develop`
    }
  }
}

After this, run your tests with this command: truffle test (before that you need to start node, for example with this: ganache-cli -> to install it use this command: npm i -g ganache-cli)

Answer 6

Piggybacking on @Pani response here. But instead of using the Gnache CLI, you can also use the Gnache GUI.

Step 1 Download the Gnache GUI here

Step 2

Follow the instructions here, this will kickstart the testnet EVM, which will allow you to migrate your code to the EVM. I thought truffle develope already does that, but it doesn't seem to do it.

Answer 7

use

     develop: {
     host: "127.0.0.1",     // Localhost (default: none)
     port: 7545,            // Standard Ethereum port (default: none)
     network_id: "*",       // Any network (default: none)
    },

the name is develop as the office website description You can configure truffle develop to use any of the available ganache-core options and configurable network settings.

For example:

module.exports = {
  /* ... rest of config */

  networks: {
    /* ... other networks */

    develop: {
      port: 8545,
      network_id: 20,
      accounts: 5,
      defaultEtherBalance: 500,
      blockTime: 3
    }
  }
};