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[alias-server] Add RPC call for isFinalBlock
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Authored by bytesofman on Mar 31 2023, 13:42.

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Reviewers
Fabien
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rABC06b537eba3b1: [alias-server] Add RPC call for isFinalBlock
Summary

T3060

Add a function to determine avalanche 'isfinalblock' status. Add a new test script to call this function. Modify schema of secrets.js to support rpc info for full node requests.

Test Plan
cp secrets.sample.js secrets.js

Enter your rpc call info (DM me if you need info for a test server)

npm run rpc and response good

Change scripts/testRpc.js so that const blockhash === 'foo'

npm run rpc and get the error msg from the node (blockhash must be of length 64 (not 3, for 'foo'))

Change your rpc params in secrets.js so that your url is bad

npm run rpc, returns false, error msg is logged

Diff Detail

Event Timeline

Fabien added inline comments.
web/alias-server/src/rpc.js
11 ↗(On Diff #39104)

Even under harsh circumstances this seems very high

25 ↗(On Diff #39104)

I don't see any error management. The request will always return a response, containing true or an error: how do you catch the second case ?

bytesofman added inline comments.
web/alias-server/src/rpc.js
11 ↗(On Diff #39104)

indeed. copy pasted directly from bch-api, which I'm glad we are no longer using. reduced to 1000ms based on what seemed reasonable in my testing of bad URLs.

25 ↗(On Diff #39104)

I have improved the error mgmt parsing and tested it with two different likely common errors

  1. bad connection / timeout
  2. bad input to the node

Even if there are some cases that remain unparsed, isFinalBlock will only return true if

  • good response
  • response is of format {data:{result: <result>, error: <error>, id: <id>}
  • response.data.result === true

if this isn't the case, then isFinalBlock will not === true, and this is what will cause the app to exit the "block found" loop before processing any alias txs.

Fabien requested changes to this revision.Mar 31 2023, 19:16

I just noticed there is no copyright header in any of the files, that's something you need to fix in another diff

web/alias-server/scripts/testRpc.js
8

you might as well make it argv[1]

10

By the doc at the top of the file, the function really should be named after what it does and the same goes for the file.
Without reading the code, what do you expect testRpc.js to do ?

Usage or help is also welcome

web/alias-server/src/rpc.js
39

That's not as resilient as return result === true. Let's imagine the node returns no error and "result":"maybe", you'll consider it true.

53

You don't need that branch. Just construct the message string in the if/else and always log + return false (or log directly in the branch so you don't even need nodeErrorMsg)

This revision now requires changes to proceed.Mar 31 2023, 19:16
bytesofman marked 6 inline comments as done.
bytesofman edited the test plan for this revision. (Show Details)

Improving code quality per diff review

web/alias-server/scripts/testRpc.js
8

in this case, process.argv[2], as [0] is node, [1] is the script, and [2]` is anything following

e.g. console.log(process.argv)

[
  '/home/<user>/.nvm/versions/node/v16.14.2/bin/node',
  '/home/<userr>/path/to/bitcoin-abc/web/alias-server/scripts/isFinalBlock',
  'foo'
]
10

Intent is to have one script that makes all the rpc calls used in the app. For now, it's just isFinalBlock, but might use more later. Same reason the input is hardcoded.

That said, it is niftier to accept custom input from the command line, and I don't know if the app will use any more rpc commands. rpc could be deprecated here with some chronik improvements.

Updated.

web/alias-server/src/rpc.js
39

patched

53

patched

I just noticed there is no copyright header in any of the files, that's something you need to fix in another diff

Added to T3060

Fabien requested changes to this revision.Apr 3 2023, 08:06

It's much better now, only missing a unit test for isFinalBlock. You'll need to mock the node response here, and that will be useful to test the upper logic as well in later diffs.

web/alias-server/src/rpc.js
56 ↗(On Diff #39113)

If you return in the first branch, you don't need the else.

This revision now requires changes to proceed.Apr 3 2023, 08:06

remove unnecessary else block

Adding unit tests for isFinalBlock

This revision is now accepted and ready to land.Apr 3 2023, 14:10