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troubleshooting.md

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Troubleshooting



Generic Troubleshooting

Ensure rly package is properly installed

Run:

$ rly version

If this returns an error, make sure you have Go installed and your Go environment is setup. Then redo Step 1.

Verify valid keys, balance, and path

$ rly chains list

Output should show all checkboxes:

-> type(cosmos) key(✔) bal(✔) path(✔)

Verify valid chain, client, and connection

$ rly paths list

If output:

-> chns(✘) clnts(✘) conn(✘)

Verify that you have a healthy RPC address. This means the relayer was unable to query the latest height of one or both the chains.

If:

-> chns(✔) clnts(✘) conn(✘)

Your client is the culprit here. Your client may be invalid or expired.

Ensure Client is not expired

$ rly query clients-expiration <PATH-NAME>


Inspect Go runtime debug data

If you started rly with the default --debug-addr argument, you can open http://localhost:7597 in your browser to explore details from the Go runtime.

If you need active assistance from the Relayer development team regarding an unresponsive Relayer instance, it will be helpful to provide the output from http://localhost:7597/debug/pprof/goroutine?debug=2 at a minimum.



Specific Errors

error querying block data
The relayer looks back in time at historical transactions and needs to have an index of them.

Specifically check ~/.<node_data_dir>/config/config.toml has the following fields set:

indexer = "kv"
index_all_tags = true
error building or broadcasting transaction
When preparing a transaction for relaying, the amount of gas that the transaction will consume is unknown. To compute how much gas the transaction will need, the transaction is prepared with 0 gas and delivered as a `/cosmos.tx.v1beta1.Service/Simulate` query to the RPC endpoint. Recently chains have been creating AnteHandlers in which 0 gas triggers an error case: 
lvl=info msg="Error building or broadcasting transaction" provider_type=cosmos chain_id=evmos_9001-2 attempt=1 max_attempts=5 error="rpc error: code = InvalidArgument desc = provided fee < minimum global fee (0aevmos < ). Please increase the gas price.: insufficient fee: invalid request"

A workaround is available in which the min-gas-amount may be set in the chain's configuration to enable simulation with a non-zero amount of gas.

    evmos:
        type: cosmos
        value:
            key: relayer
            chain-id: evmos_9001-2
            rpc-addr: http://127.0.0.1:26657
            account-prefix: evmos
            keyring-backend: test
            gas-adjustment: 1.2
            gas-prices: 20000000000aevmos
            min-gas-amount: 1
            debug: false
            timeout: 20s
            output-format: json
            sign-mode: direct
invalid header: new header has a time from the future
This is most likely an rpc issue. The latest block time on the source and destination chain have likely drifted apart.

You can confirm by this by checking the latest block time on each chain:

grpcurl -plaintext <GRP-URL:PORT> cosmos.base.tendermint.v1beta1.Service.GetLatestBlock | grep '"time":'

The solution here is to either use a different RPC endpoint OR if you are in control of the RPC, try restarting the node.



<-- Create Path Across Chains - Features -->