Run A Local Test Network

This page guide you to run fakenet (private testing network) with N local nodes, primarily for testing/benchmarking purposes.

Download go-u2u

Please check out and clone go-u2u source code:

git clone https://github.com/unicornultrafoundation/go-u2u

Scripts

Scripts to run fakenet are located at demo folder, it contains these scripts:

• start network: ./start.sh;

• stop network: ./stop.sh;

• clean data and logs: ./clean.sh;

You can specify number of genesis validators by setting N environment variable.

Balance transfer example

from demo/ dir

• Start network:

N=3 ./start.sh

• Attach js-console to running node0:

go run ../cmd/u2u attach http://localhost:4000

• Check the balance to ensure that node0 has something to transfer (node0 js-console):

eth.getBalance(eth.accounts[0]);

output shows the balance value:

1e+27

• Get node1 address:

go run ../cmd/u2u attach --exec "eth.accounts[0]" http://localhost:4001

output shows address:

"0x02aff1d0a9ed566e644f06fcfe7efe00a3261d03"

• Transfer some amount from node0 to node1 address as receiver (node0 js-console):

eth.sendTransaction(
	{from: eth.accounts[0], to: "0x02aff1d0a9ed566e644f06fcfe7efe00a3261d03", value:  "1000000000"},
	function(err, transactionHash) {
        if (!err)
            console.log(transactionHash + " success");
    });

output shows unique hash of the outgoing transaction:

0x68a7c1daeee7e7ab5aedf0d0dba337dbf79ce0988387cf6d63ea73b98193adfd success

• Check the transaction status by its unique hash (js-console):

eth.getTransactionReceipt("0x68a7c1daeee7e7ab5aedf0d0dba337dbf79ce0988387cf6d63ea73b98193adfd").blockNumber

output shows number of block, transaction was included in:

174

• As soon as transaction is included into a block you will see new balance of both node addresses:

go run ../cmd/u2u attach --exec "eth.getBalance(eth.accounts[0])" http://localhost:4000
go run ../cmd/u2u attach --exec "eth.getBalance(eth.accounts[0])" http://localhost:4001

outputs:

9.99999999978999e+26
1.000000000000001e+27