Contact multiple nodes to confirm validity of retrieved results

[TimDaub]

BigchainDB nodes can behave maliciously and send drivers incorrect results. We therefore generally advise to query only trusted nodes. We also advise to:

If a user wants to ask a BigchainDB cluster about the validity of a transaction, they must ask enough of the nodes to determine what a majority of the nodes think. The non-faulty nodes should all agree on the transaction’s validity. We assume that a majority of nodes are not faulty (i.e. not broken or somehow compromised).

The JS driver currently does not support this, but should be by allowing to query multiple nodes for results such that it asks "enough of the nodes to determine what a majority of the nodes think", meaning a majority decision on the results.