Open JimLarson opened 7 months ago
Attn @toliaqat @sufyaankhan
Notes on vstorage queries in particular: https://github.com/Agoric/agoric-sdk/tree/master/golang/cosmos/x/vstorage
Some internal references from code search:
More internal code search results from agoric-labs:
Quick note on querying at a historical block height. Example from cosmos-sdk docs:
curl \
-X GET \
-H "Content-Type: application/json" \
-H "x-cosmos-block-height: 123" \
http://localhost:1317/cosmos/bank/v1beta1/balances/$MY_VALIDATOR_ADDRESS
Since agoric-labs/KREAd seems to be an unmodifed fork of Kryha's version, and Kryha-develop branch tip doesn't seem to contain a legacy query, I don't think we need to update our stale fork - it should be synced instead. But someone might want to contact Kryha in case their active version still has it.
Filed #9145 for ensuring the KREAd frontend gets upgraded - if necessary.
Confirmed that @warner created our fork in agoric-labs for performance testing and that it will be upgraded by syncing when needed. Modifying the agoric-labs/KREAd code is not a task blocking upgrade-16.
What is the Problem Being Solved?
The cosmos-sdk 0.47 upgrade planned for
agoric-upgrade-16
(#8225) removes support for "legacy queries". These are recognized by use of the RPC endpoint (e.g. main.rpc.agoric.net or port:26657
) for theabci_query
method with a"path"
parmeter that starts with/custom
.Queries should transition to using gRPC directly via the gRPC endpoint, or the REST-gRPC gateway via the API endpoint. It is possible to access gRPC via the RPC endpoint by using
abci_query
with a gRCP path (the same path used for the REST gateway), but this is not recommended due to the higher overhead and greater locking required.Description of the Design
An access via a legacy query looks like:
which returns an encoded result like
Changing this to a gRPC-encoded path would require encoding of the argument in addition to decoding the response:
which again returns encoded results
So instead we recommend a REST query against the API endpoint:
which returns the easily-parseable response
Security Considerations
N/A
Scaling Considerations
gRPC queries are preferred due to the low overhead. REST queries (via the API endpoint) are preferred over RPC queries due to the lower overhead and use of the proper HTTP operation (GET vs POST), though not as good as gRPC.
Test Plan
Each specific call site should test its modified query.
Upgrade Considerations
Queriers can and should upgrade before
agoric-upgrade-16
.