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docs: add QGB verify command docs #1287

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Jan 31, 2023
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docs: add QGB verify command docs #1287

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docs: add QGB verify command docs
rach-id Jan 24, 2023
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Update x/qgb/README.md
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Expand Up @@ -118,6 +118,42 @@ if k.CheckLatestAttestationNonce(ctx) && k.GetLatestAttestationNonce(ctx)+1 != n
}
```

## Verification command

The QGB verification command is part of the `celestia-appd` binary. It allows the user to verify that a set of shares has been posted to a specific QGB contract.

```shell
$ celestia-appd verify --help
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[non-blocking] This code snippet may become out of date with the true --help docs so instead of copy + pasting the entire help output, I think it may be preferable to include the text that isn't the code snippet and at the bottom say something like:

See the following command for more details

celestia-appd verify --help

and then ensure that these docs make it into the appropriate --help docs

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@rach-id rach-id Jan 24, 2023 •
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What do you think is better for docs, providing the commands but without an output, or the commands + their output (that might be outdated after some time)?

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I personally think the latter is better, and we should just update the docs to reflect the new flags/arguments later

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What do you think is better for docs, providing the commands but without an output, or the commands + their output (that might be outdated after some time)?

In this scenario: providing the commands but without an output. I think this because the goal of the README is to give developers a high level overview of the QGB module. Developers aren't necessarily users of the QGB module CLI. Users of the QGB CLI should be able to get information on CLI flags via --help and I expect them to try that before finding this README.

Also (repeated from above): the command output becomes a maintenance burden but I defer to you @sweexordious

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I guess we can leave it as it is for now, with the help output. And, if it becomes a burden later, we can remove it.
Thanks guys for your help 👍 👍


Verifies that a transaction hash, a range of shares, or a blob referenced by its transaction hash were committed to by the QGB contract

Usage:
celestia-appd verify [command]

Available Commands:
blob Verifies that a blob, referenced by its transaction hash, in hex format, has been committed to by the QGB contract. Only supports one blob for now
shares Verifies that a range of shares has been committed to by the QGB contract
tx Verifies that a transaction hash, in hex format, has been committed to by the QGB contract

Flags:
-h, --help help for verify

Global Flags:
--home string directory for config and data (default "/home/midnight/.celestia-app")
--log_format string The logging format (json|plain) (default "plain")
--log_level string The logging level (trace|debug|info|warn|error|fatal|panic) (default "info")
--trace print out full stack trace on errors

Use "celestia-appd verify [command] --help" for more information about a command.

```

It currently supports three sub-commands:

- `blob`: Takes a transaction hash, in hex format, and verifies that the blob paid for by the transaction has been committed to by the QGB contract. It only supports one blob for now.
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Should this specify that a prefix is needed?

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Which prefix? A transaction hash in hex format is something like: 7826D5310CD007F82B918359D74A853B4ECB6633E9F231C5477B7F21D68D642D if I am not missing something

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Nvm, I was wrong. Maybe we should still specify that no prefix is required

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- `shares`: Takes a range of shares and a height, and verifies that these shares have been committed to by the QGB contract.
- `tx`: Takes a transaction hash, in hex format, and verifies that it has been committed to by the QGB contract.
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Same as above


## Useful links

The smart contract implementation is in [quantum-gravity-bridge](https://github.com/celestiaorg/quantum-gravity-bridge/).
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