Genesis generation by file input can be done by using 'puppeth --file <file_path>' command. The input file should be in YAML format as the following example.

name: testsubnet grandmasters:

• '0x2A5300279D134f7bee1A7ab1930B70d9473eAB8b' masternodes:
• '0x74aDeAbE0a4f9242E49B801A71A63e4f6cbE0850'
• '0xAA3AB1fd09722c90e842691456d9e45e6817086e'
• '0x40E7901e83b85c57D5665174854e3A6e640160cA'
• '0xeC33a919BC24f0D4E62B53ADAcD7563Ab29E6f42'
• '0x35516668bE8595950Bc1025265aaf68C18c17d48' chainid: 34908

Below are all the available configs and their defaults. Code is in GenesisInput struct, wizard_genesis_file.go.

name: subnet period: 2 reward: 2 timeoutperiod: 10 timeoutsyncthreshold: 3 certthreshold: 0.667 grandmasters: (default empty)

• '0x0000000000000000000000000000000000000000' masternodes: (default empty)
• '0x0000000000000000000000000000000000000000' epoch: 900 gap: 450 chainid: 112