Support PFB decoding in Solidity #141
Description
In order to prove that the data was posted to Celestia on the QGB smart contract, we will need to be able to parse the PFB message in solidity so that we're able to verify that the shareIndex, the commitment were actually posted to Celestia and therefore the data was also posted to Celestia.
We could use the following decoder for this: https://github.com/celestiaorg/protobuf3-solidity