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Light Client: "height requested is too high" thrown when querying against the latest height #7641

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ashcherbakov opened this issue Jan 19, 2022 · 1 comment · Fixed by #7642
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Light Client: "height requested is too high" thrown when querying against the latest height #7641

ashcherbakov opened this issue Jan 19, 2022 · 1 comment · Fixed by #7642

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@ashcherbakov
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ashcherbakov commented Jan 19, 2022 •
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Tendermint version: v0.34.14

What happened:

  • LightClient proxy is started
  • An ABCI query request is sent via light client proxy with the default height (0) which means to query against the latest state
  • Light client successfully receives the response, and tries to update itself for the next height (H+1)
  • A block with H+1 is not created yet, and light client fails with height requested is too high error

What you expected to happen:
Probably one of the following should happen (be configurable):

  • Option1: light client waits until the new block (H+1) is committed
  • Option2: if query against the latest state needs to be done, perform query against latestHeight-1 instead (need to calculate lateststate-1 properly to make sure that we don't get an outdated request if latest state is taken from a malicious primary node)

It looks like Option2 is used for block_results request (BlockResults in https://github.com/tendermint/tendermint/blob/master/light/rpc/client.go)
@ashcherbakov ashcherbakov mentioned this issue Jan 19, 2022
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@ashcherbakov
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Fix implementing Option2: #7642

@ashcherbakov ashcherbakov mentioned this issue Jan 20, 2022
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@SebastianElvis SebastianElvis mentioned this issue Feb 3, 2023
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Abdulbois added a commit to zigbee-alliance/distributed-compliance-ledger that referenced this issue Feb 6, 2024
@Abdulbois
#303 Upgrade Cosmos-SDK to v0.47.3
fabb960 
- Replace 'cometbft' repo with fork due to light Proxy issue - tendermint/tendermint#7641
- Enable accessing lightclient0 endpoint

Signed-off-by: Abdulbois <[email protected]>
Signed-off-by: Abdulbois <[email protected]>
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light: Fix query against the latest state in light client ashcherbakov/tendermint
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@ashcherbakov