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Today, I will talk to you about how to use geth to build a multi-node private chain, many people may not know much about it. In order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.

1. Create at least two different paths. Here are node1 and node2.

Mkdir / tmp/node1mkdir / tmp/node2

2. Edit the initialization configuration file. What I use here is

{"config": {"chainId": 10, "homesteadBlock": 0, "eip155Block": 0, "eip158Block": 0}, "alloc": {}, "coinbase": "0x0000000000000000000000000000000000000000", "difficulty": "0x20000", "extraData": "," gasLimit ":" 0x2fefd8 "," nonce ":" 0x0000000000000042 " "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000", "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000", "timestamp": "0x00"}

3. Use the geth command to enable the node

Geth-datadir / tmp/node1-rpc-rpcport 8546-networkid 1101-rpccorsdomain "*" console

Parameter description

Rpc indicates that rpc mode is enabled

Rpcport specifies rpc port

Nerworkid through which port the node is connected to the network? if you want to associate multiple nodes, the networkid of the node must be consistent. Otherwise, it won't be connected.

Rpccorsdomain indicates which networks or nodes are allowed to link to this node.

Console means to open the command line in this window.

Geth-datadir / tmp/node2-networkid 1101-port 30304 console

Port means to specify the port on which this node is running.

The last command did not, because the default port number is 30303.

4. Connect nodes

Select one of the nodes that are already open

Type in console

Admin.nodeInfo.enode

Returns the string of the enode node, something like this

"enode://b33db66202917898415228cb6dfca3911c504d1064c681e05250f162d6e8ef9bd09d7e98120893c14f488fac02aa6b2ee7aefde24cb8bdd47a3e26dd4683da09@127.0.0.1:30304"

Copy the string.

Type in the console of another node

Admin.addPeer ("string just copied by enode")

Hit enter and return to true.

Then verify it.

Net.peerCount

Return 1. It means that the connection between the nodes is successful.

After reading the above, do you have any further understanding of how to use geth to build a multi-node private chain? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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