feat: simplify node start

[redhdx]

Description

Simplify op-geth start.

Rationale

Currently, starting op-geth requires manual setting of many parameters. In order to facilitate users to start nodes, some default configuration added for opBNB mainnet and testnet.

Example

Currently, there are two network configurations, opBNB mainnet and testnet by default. You can select the corresponding network configuration by setting --opBNBMainnet or --opBNBTestnet. You also need to set some config manually:

• --authrpc.jwtsecret=./jwt.txt
• --rollup.sequencerhttp=L2_RPC
• --datadir=./datadir

You can start the node in the following way. If you are starting a new node, you do not need to init genesis.json. If you just restart the node and have already inited genesis.json, you can still use this command. You do not need to set --datadir. The op-geth will provide a default datadir. You can see the data path in the startup log. like this:

 database=/.../Ethereum/opBNBTestnet/geth/chaindata

database=/.../Ethereum/opBNBMainnet/geth/chaindata

However, if you have set datadir before and started node, you must still set it and keep it consistent. It is recommended to set datadir manually.

For example:

 ./geth --opBNBMainnet --authrpc.jwtsecret=./jwt.txt --datadir=./datadir --rollup.sequencerhttp=L2_RPC

 ./geth --opBNBTestnet --authrpc.jwtsecret=./jwt.txt --datadir=./datadir --rollup.sequencerhttp=L2_RPC

Changes

Notable changes:

• add some default settings for opBNB

[welkin22]

LGTM, except for one question

[welkin22]

LGTM