Ethereum: json-rpc via curl

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Ethereum JSON-RPC via Curl on Bitcoin-Qt 0.8.6.1-beta on Windows 7 64

The Ethereum community has provided a way to access the JSON-RPC interface for Ethereum using the curl command, which allows users to interact with the Ethereum network from their local machine. In this article, we will show you how to set up and use curl to access the Ethereum JSON-RPC interface via Bitcoin-Qt 0.8.6.1-beta on Windows 7 64.

Prerequisites

Before proceeding, make sure that:

• You have installed Bitcoin-Qt 0.8.6.1-beta on your system.

• Your system is running Windows 7 64-bit.

• You have curl installed on your system. If not, you can download it from the official website: <

Setup

• Open a new command prompt or terminal window.

• Change into the C:\Users\username\.bitcoin directory (replace username with your actual username).

• Run the following command to install the necessary dependencies:

npm install bitcoinjs-rpc -g

This will install the bitcoinjs-rpc package and make it available globally.

• Verify that the installation was successful by running:

bitcoinjs-rpc --version

• To use curl, navigate to the C:\Users\username\.appdata\roaming\bitcoin\bin directory (replace username with your actual username). You should see a folder named bitcoin.

• Create a new file in this directory, for example, ethereum-rpc.json. You can use any text editor to create the file.

• Open the ethereum-rpc.json file and add the following JSON-RPC interface:

{

  "rpcuser": "bitcoinrpc",

  "rpcpassword": "ahything",

  "rpcallowip": ["*"],

  "rpcapi": ["0x"),

  "rpcbind": "

  "rpcsslport": null,

  "rpcsslcertfile": "",

  "rpcsslkeyfile": ""

}

This configuration allows the user to access the Ethereum JSON-RPC interface on

• Save and close theethereum-rpc.jsonfile.

Now that you have set up the Ethereum JSON-RPC interface, you can usecurlto interact with it from your local machine:

curl -X POST \

   \

  --data-raw '{"method": "eth_get_blocknumber", "params": ["latest"]}'

This command sends a POST request to the Ethereum JSON-RPC interface on specifying that we want to call the eth_getBlockNumber method with the argument "latest".

Testing

To test this, you can run:

curl -X POST \

   \

  --data-raw '{"method": "eth_getTransactionCount", "params": ["0x")}'

This command sends a POST request to the Ethereum JSON-RPC interface on specifying that we want to call theeth_getTransactionCountmethod with the argument“0x01”. The response should contain the current block number.

Note: Make sure to replace“0x”)”and“0x01″` with the actual transaction hash or code if you are using a different Ethereum-based application.

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