How can i add other information in Block Header?

Question

I want to add some different transaction information in my chain, but i can't find where can i add it.

The different transaction information is about other chain.

for example:
Mr.X sell goods to Mr.Y (the goods is a coin in my chain, call G-coin)
Mr.X will be receive 100 A-coin

I want to record something with this transaction information,
in G-coin chain will be record A-coin Block number, and A-coin chain will be record G-coin Block number.

How can i add this information in block?

Answer 1

It sounds like this is information that should be added to individual transactions, rather than to block headers. MultiChain has wide provisions for transaction metadata – you can start with the sendwithdata API.

Comments

OK, thank you very much!
I got it.