query.go

package baseapp

/*
	XXX Make this work with MultiStore.
	XXX It will require some interfaces updates in store/types.go.

	if len(reqQuery.Data) == 0 {
		resQuery.Log = "Query cannot be zero length"
		resQuery.Code = abci.CodeType_EncodingError
		return
	}

	// set the query response height to current
	tree := app.state.Committed()

	height := reqQuery.Height
	if height == 0 {
		// TODO: once the rpc actually passes in non-zero
		// heights we can use to query right after a tx
		// we must retrun most recent, even if apphash
		// is not yet in the blockchain

		withProof := app.CommittedHeight() - 1
		if tree.Tree.VersionExists(withProof) {
			height = withProof
		} else {
			height = app.CommittedHeight()
		}
	}
	resQuery.Height = height

	switch reqQuery.Path {
	case "/store", "/key": // Get by key
		key := reqQuery.Data // Data holds the key bytes
		resQuery.Key = key
		if reqQuery.Prove {
			value, proof, err := tree.GetVersionedWithProof(key, height)
			if err != nil {
				resQuery.Log = err.Error()
				break
			}
			resQuery.Value = value
			resQuery.Proof = proof.Bytes()
		} else {
			value := tree.Get(key)
			resQuery.Value = value
		}

	default:
		resQuery.Code = abci.CodeType_UnknownRequest
		resQuery.Log = cmn.Fmt("Unexpected Query path: %v", reqQuery.Path)
	}
	return
*/