I believe this is a common question on cen db and dec db, as i know in decentralized database, it can be differentiate into permissionless(bitcoin) and permissioned. How can i distinguish the difference on functions between centralized db and permissioned blockchain? what is the benefits of permissioned blockchain?

Hello guys, I am going to have a project to apply blockchain technology to the any industry we think we can bring the most benefit. Right now our group is considering applying on the supply chain field. Meanwhile, i believe I do not have sufficient knowledge about blockchain. I would like to seek help for the development direction.
For example, I think I should study on the type of consensus for the blockchain of the project, how about token? I think it should be not necessary to apply cryptocurrencies into the project? But should i also study the different types of ERC token type?

I am very frustrated and I just had a investigation on blockchain within a month time, feeling the online data are kinda messy too.

I was testing a smart contract in the Etherscan but I enter one problem is I do not know what to enter

>getTests: _int(uint256[])
>>> bool
[getTests method Response]
>> bool: TypeError: t.forEach is not a function

I tried to enter 1? ["1"] ? I do not know how to fill in and still haven't got the reply from the website support...

Can anyone help?

Too many exchange sites..... Got no idea on how to start with the trading..

Interested to find out increasing number of blockchain development and technology in different field.
Would it be possible to apply on the supply chain work field?