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add extra guard to fail if trying to submit a too big transaction #4131

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merged 2 commits into from
May 13, 2019

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KtorZ
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@KtorZ KtorZ commented May 2, 2019

Description

This can happen because we only estimate the maximum number of inputs allowed for the coin selection.
As a result, the transaction generated as a result of the coin selection may be slightly bigger than
the maximum sized allowed by the network (currently 8kb). So, having an extra sanity checks prevent
wrong transactions to be submitted (and added to our pendin set)

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?

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  • 🛠 New feature (non-breaking change which adds functionality)
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  • 🏭 Refactoring that does not change existing functionality but does improve things like code readability, structure etc
  • 🔨 New or improved tests for existing code
  • ⛑ git-flow chore (backport, hotfix, etc)

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This can happen because we only _estimate_ the maximum number of inputs allowed for the coin selection.
As a result, the transaction generated as a result of the coin selection may be slightly bigger than
the maximum sized allowed by the network (currently 8kb). So, having an extra sanity checks prevent
wrong transactions to be submitted (and added to our pendin set)
@KtorZ KtorZ self-assigned this May 2, 2019
@alan-mcnicholas alan-mcnicholas requested a review from piotr-iohk May 7, 2019 08:38
Right meta -> return $ Right (taTx $ txAux, meta)
let sz = fromIntegral $ BL.length $ serialize txAux
maxSz <- Node.getMaxTxSize (walletPassive activeWallet ^. walletNode)
if sz > maxSz then

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@KtorZ, just to make sure, we don't need sz >= maxSz here (most probably not, but asking just to be safe :) )

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I am not sure how cardano-sl approaches maximum actually and whether it treats it as an inclusive or exclusive boundary 🤔 ...

@@ -177,7 +177,7 @@ pay activeWallet spendingPassword opts accountId payees = do
Right (txAux, partialMeta, _utxo) -> do
let sz = fromIntegral $ BL.length $ serialize txAux
maxSz <- Node.getMaxTxSize (walletPassive activeWallet ^. walletNode)
if sz > maxSz then
if sz >= maxSz then
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👌

@disassembler
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@piotr-iohk can you approve the PR so I can merge it?

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👍

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bors r+

iohk-bors bot added a commit that referenced this pull request May 13, 2019
4131: add extra guard to fail if trying to submit a too big transaction r=disassembler a=KtorZ

## Description

<!--- A brief description of this PR and the problem is trying to solve -->

This can happen because we only _estimate_ the maximum number of inputs allowed for the coin selection.
As a result, the transaction generated as a result of the coin selection may be slightly bigger than
the maximum sized allowed by the network (currently 8kb). So, having an extra sanity checks prevent
wrong transactions to be submitted (and added to our pendin set)


## Linked issue

<!--- Put here the relevant issue from YouTrack -->

?



Co-authored-by: KtorZ <matthias.benkort@gmail.com>
Co-authored-by: Samuel Leathers <samuel.leathers@iohk.io>
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bors r+

iohk-bors bot added a commit that referenced this pull request May 13, 2019
4131: add extra guard to fail if trying to submit a too big transaction r=disassembler a=KtorZ

## Description

<!--- A brief description of this PR and the problem is trying to solve -->

This can happen because we only _estimate_ the maximum number of inputs allowed for the coin selection.
As a result, the transaction generated as a result of the coin selection may be slightly bigger than
the maximum sized allowed by the network (currently 8kb). So, having an extra sanity checks prevent
wrong transactions to be submitted (and added to our pendin set)


## Linked issue

<!--- Put here the relevant issue from YouTrack -->

?



Co-authored-by: KtorZ <matthias.benkort@gmail.com>
Co-authored-by: Samuel Leathers <samuel.leathers@iohk.io>
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iohk-bors bot commented May 13, 2019

@iohk-bors iohk-bors bot merged commit 2318269 into develop May 13, 2019
@iohk-bors iohk-bors bot deleted the KtorZ/tx-max-size-guard branch May 13, 2019 14:53
disassembler added a commit that referenced this pull request May 22, 2019
jbgi pushed a commit that referenced this pull request Jun 3, 2019
jbgi pushed a commit that referenced this pull request Jun 3, 2019
@jbgi jbgi mentioned this pull request Jun 7, 2019
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jbgi pushed a commit that referenced this pull request Jun 11, 2019
jbgi pushed a commit that referenced this pull request Jun 11, 2019
jbgi pushed a commit that referenced this pull request Jun 11, 2019
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3 participants