[Ethereum] Curl JSONRPC to localhost:8545

blockchainjson-rpc

I am trying to do a simple curl from the cmd line to my private blockchain.
I have the geth console running on localhost:8545

The curl command I am executing is the following

curl -X POST --data '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}' http://localhost:8545

I also have tried many other examples from https://github.com/ethereum/wiki/wiki/JSON-RPC

none of them work on my set up as all the responses are

{"jsonrpc":"2.0","error":{"code":-32600,"message":"invalid character '\\'' looking for beginning of value"}}}

I start geth using this:

geth --rpc --rpcapi "eth,net,web3,personal" --datadir c:\privatechain

Best Answer

windows needs the content in double quotes and those inside with \"

curl -H "Content-Type: application/json" --data "{\"jsonrpc\":\"2.0\",\"method\":\"net_version\",\"params\":[],\"id\":67}" http://localhost:8545

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JSON-RPC Issue – ‘eth_accounts’ Returns No Accounts in Go-Ethereum

You don't need to use the params field in your call. By doing this, you are executing this command: eth.accounts[] which returns a null value. If you want to get a list of all the accounts, you should be executing eth.accounts. So, your RPC command should be:

curl -X POST -d '{"method":"eth_accounts","id":1}' 127.0.0.1:8545

P.S: I'm assuming you already enabled RPC on port 8545. Through the console, you can use admin.startRPC() to start RPC.

Truffle Contract Deployment – Resolving Rinkeby Test Network Issues

The problem was in the truffle.js file.

module.exports = {
  networks: {
    rinkeby: {
      network_id: 4,
      host: '127.0.0.1',
      port: 8545,
      gas: 4000000,
      from: <your account address>
    },
  },
  rpc: {
    // Use the default host and port when not using rinkeby
    host: 'localhost',
    port: 8080,
  },
};

Just needed to add a from: <account address> into rinkeby's config information.

Best Answer

Related Solutions

JSON-RPC Issue – ‘eth_accounts’ Returns No Accounts in Go-Ethereum

Truffle Contract Deployment – Resolving Rinkeby Test Network Issues

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