Multiplex payments to multiple vendors in the same transaction

[kulpreet]

The idea is to map vouts to the review record index. We can discuss this later when you are about to implement it.

[fazo96]

Here's how I would do it

When sending the transaction

Instead of putting the RR multihash, we include the cid of a multiplexer data structure that is an array of mappings voutIndex: RRMultihash. Maybe put a chlu_version field in there as well.

• [ ] ability to create the data structure and store it in IPFS
• [ ] use it when making transactions in the demo

When reading from the blockchain or validating

The getTransactionInfo function in the bitcoin module is called from the validator module. It now returns the multihash of the associated review record and an outputs array with { index, amount, toAddress } data structure. I can just change it so that it puts the multihash in the items of the outputs array and the validator gets it from there. The demultiplexing work will be done in the bitcoin module. If it fails, it will just put isChlu: false in the transaction (it already does if there is no multihash in the OP_RETURN)

• [ ] bitcoin module reads data structure and decodes it
• [ ] demultiplex review records to the outputs
• [ ] validator uses the info correctly
• [ ] service node pins the demultiplexer