nwaku/waku/waku_store/self_req_handler.nim
Ivan FB 3e65cc18f6
REST store: get msgs from self node when store is mounted and no peerAddr is passed (#2387)
A node that handles REST-Store requests normally acts as a 
Store-client and therefore it retrieved the messages from another
Store-node.
With these changes, we allow a node with Store mounted, to retrieve
its messages. In other words, the node can act as a Store-server of
its messages.

* test_rest_store.nim: add a new test to validate that the self-node can
retrieve its messages to the REST client.

* rest/store/client.nim: add new proc to allow making a GET store
request without peerAddr.

* rest/store/handle.nim: add logic to handle requests that don't
provide peerAddr but the self/local node has Store mounted. In this case,
the self/local node will retrieve its locally stored messages.

* waku_store/self_req_handler.nim: logic to handle "store" requests
allowing the REST-store node to act as a Store-server node. The
'self_req_handler.nim' helps to bypass the store protocol and directly
retrieve the messages from the local/self node. I added this logic in
a separate file from 'protocol.nim' because it doesn't participate in
any libp2p communication.

* waku_store/protocol.nim: make 'queryHandler' attribute public so that
it can be used from the 'self_req_handler.nim' module.
2024-01-31 17:43:59 +01:00

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1.3 KiB
Nim

##
## This file is aimed to attend the requests that come directly
## from the 'self' node. It is expected to attend the store requests that
## come from REST-store endpoint when those requests don't indicate
## any store-peer address.
##
## Notice that the REST-store requests normally assume that the REST
## server is acting as a store-client. In this module, we allow that
## such REST-store node can act as store-server as well by retrieving
## its own stored messages. The typical use case for that is when
## using `nwaku-compose`, which spawn a Waku node connected to a local
## database, and the user is interested in retrieving the messages
## stored by that local store node.
##
import
stew/results,
chronos,
chronicles
import
./protocol,
./common
proc handleSelfStoreRequest*(self: WakuStore, histQuery: HistoryQuery):
Future[WakuStoreResult[HistoryResponse]] {.async.} =
## Handles the store requests made by the node to itself.
## Normally used in REST-store requests
try:
let resp: HistoryResponse = (await self.queryHandler(histQuery)).valueOr:
return err("error in handleSelfStoreRequest: " & $error)
return WakuStoreResult[HistoryResponse].ok(resp)
except Exception:
return err("exception in handleSelfStoreRequest: " & getCurrentExceptionMsg())