You need to import snapshot to avoid 503 error messages, and start to sync to mine.
Search this site with keyword “503” if you need to review other cases and solutions.
I’m also looking forward to the miners’ manual, but seems that developers are doing their best effort to enhance hyperledger sawtooth, so I’m just waiting.
I don’t know every details of configuration json files too, but I’m successfully mining until now.
Maa’s manual on steem and genuine manual are sufficient to configure mining environment correctly in my thought, if you are good at linux and scripting, and have some background knowledge on programming. No critical point was changed.
Creditcoin’s contract address should not be changed, because it is the address of smart contract. If you change the address, you may not read ERC-20 G-CRE or other tokens transactions.
Refer to the following pages if you need more resources.