Support share proofs for multiple blobs

[evan-forbes]

Currently, when we create share proofs, we only create a proof for the first blob. We should also support creating inclusion proofs to all of the blobs paid for by a PFB, along with only specific blobs. This would likely involve modifying

celestia-app/pkg/proof/proof.go

Lines 64 to 103 in 0b75c9c

	// BlobShareRange returns the start and end positions for the shares
	// where a given blob, referenced by its wrapped PFB transaction, was published at.
	// Note: only supports transactions containing a single blob.
	func BlobShareRange(tx types.Tx) (beginShare uint64, endShare uint64, err error) {
	indexWrappedTx, isIndexWrapped := types.UnmarshalIndexWrapper(tx)
	if !isIndexWrapped {
	return beginShare, endShare, fmt.Errorf("not an index wrapped tx")
	}
	encCfg := encoding.MakeConfig(blobmodule.AppModuleBasic{})
	decodedTx, err := encCfg.TxConfig.TxDecoder()(indexWrappedTx.Tx)
	if err != nil {
	return beginShare, endShare, err
	}
	if len(decodedTx.GetMsgs()) == 0 {
	return beginShare, endShare, fmt.Errorf("PayForBlobs contains no messages")
	}
	if len(decodedTx.GetMsgs()) > 1 {
	return beginShare, endShare, fmt.Errorf("PayForBlobs contains multiple messages and this is not currently supported")
	}
	if sdk.MsgTypeURL(decodedTx.GetMsgs()[0]) != blobtypes.URLMsgPayForBlobs {
	return beginShare, endShare, fmt.Errorf("msg is not a MsgPayForBlobs")
	}
	pfb, ok := decodedTx.GetMsgs()[0].(*blobtypes.MsgPayForBlobs)
	if !ok {
	return beginShare, endShare, fmt.Errorf("unable to decode PayForBlob")
	}
	if err = pfb.ValidateBasic(); err != nil {
	return beginShare, endShare, err
	}
	beginShare = uint64(indexWrappedTx.ShareIndexes[0])
	sharesUsed := shares.SparseSharesNeeded(pfb.BlobSizes[0])
	return beginShare, beginShare + uint64(sharesUsed) - 1, nil
	}

to support this