feat!: use harcoded global min gas price check in ProcessProposal #2985
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ninabarbakadze
requested review from
liamsi,
adlerjohn,
evan-forbes,
rootulp and
cmwaters
as code owners
WalkthroughThe changes primarily introduce a global minimum gas price affecting transaction fee calculations and prioritizations, replacing the previous node-specific minimum gas prices. This new consensus rule aims to standardize transaction costs and prevent undercutting in the blockspace market. Tests are updated to reflect these changes, and a new Multisig feature is documented. The project's Go version is also updated across various configurations and Dockerfiles. Changes
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| @@ -78,7 +78,7 @@ func (s *MaxTotalBlobSizeSuite) TestErrTotalBlobSizeTooLarge() { | |||
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| for _, tc := range testCases { | |||
| s.Run(tc.name, func() { | |||
| blobTx, err := signer.CreatePayForBlob([]*blob.Blob{tc.blob}, user.SetGasLimit(1e9)) | |||
| blobTx, err := signer.CreatePayForBlob([]*blob.Blob{tc.blob}, user.SetGasLimit(1e9), user.SetFee(2000000)) | |||
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nit: Since the minimum gas price is hardcoded, you could probably create a function that takes the gas limit and returns the minimum fee instead of having to calculate it yourself
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do you suggest I put that helper in a separate package or do you have a specific spot in mind?
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had one blocking comment, but otherwise LGTM!! great work and debugging 👍
its an optimization and therefore optional, and can be done in a different PR, but if we wanted to fail even faster we could account for the new min fee in the user package.
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Overall LGTM! Great work. I have a few nits about wording in the specs that are optional and one question about whether we need to preserve the v1 behavior to support single binary syncs.
For context: #1568
Update: disregard I don't think we need to preserve the v1 behavior because when a v2 binary is syncing from genesis and processing v1 blocks, it doesn't have access to the min gas price of various block proposers and their is no validity rule on what the min gas price should be for those blocks.
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some of the nits will be addressed in a different pr when I continue working on the second part of this feature. #3016 |
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Co-authored-by: nina / ნინა <[email protected]>
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| // GlobalMinGasPrice is used in the processProposal to ensure | ||
| // that all transactions have a gas price greater than or equal to this value. | ||
| GlobalMinGasPrice = DefaultMinGasPrice |
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[blocking][question] for @cmwaters. The breakdown of files in pkg/appconsts has me wondering where this constant should be defined. Candidates:
consensus_consts.gobecause this is a new "consensus constant"v2/app_consts.gobecause this is a new param introduced in app version v2
If we do keep this in initial_consts.go then I think we need to update the comment at the top of this file because this constant can't be modified via on-chain governance or the node's local config.
// The following defaults correspond to initial parameters of the network that can be changed, not via app versions
// but other means such as on-chain governance, or the nodes local config
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This should be viewed as a temporary home for now as we will want to either make it a governance parameter or have some other mechanism which picks this value. I don't think v2 will simply have this hardcoded value.
If we want to move it, we can shift it to the v2 directory. I'm easy either way
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Sounds good, I like v2/app_consts.go.
I think I'd rather it not be a governance modifiable param but I think we can discuss that as a follow up. Mostly b/c I don't think we should have any governance params long term and instead we should modify params via hard-forks after reaching rough consensus off-chain. So eventually we would move from governance params to versioned params.
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Since this PR already has two approvals, I don't think we need to block on just this constant move. We can move the constant in a follow up PR if that's easier
| @@ -39,7 +39,7 @@ func NewAnteHandler( | |||
| ante.NewConsumeGasForTxSizeDecorator(accountKeeper), | |||
| // Ensure the feepayer (fee granter or first signer) has enough funds to pay for the tx. | |||
| // Side effect: deducts fees from the fee payer. Sets the tx priority in context. | |||
| ante.NewDeductFeeDecorator(accountKeeper, bankKeeper, feegrantKeeper, checkTxFeeWithValidatorMinGasPrices), | |||
| ante.NewDeductFeeDecorator(accountKeeper, bankKeeper, feegrantKeeper, CheckTxFeeWithGlobalMinGasPrices), | |||
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[question] for @cmwaters @evan-forbes for single binary syncs and rolling upgrades, do we need to make the NewAnteHandler invocation version aware?
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I don't think we will ever be able to to remove an antehandler, so I don't think that we need to.
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I was thinking about having a generic version wrapper that wraps the decorator and only executes it for certain versions. This might be more cleaner than having version checks sporadically added to every decorator
app/ante/fee_checker.go
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| // convert the global minimum gas price to a big.Int | ||
| globalMinGasPrice, err := sdk.NewDecFromStr(fmt.Sprintf("%f", appconsts.GlobalMinGasPrice)) | ||
| if err != nil { | ||
| return nil, 0, errors.Wrap(err, "invalid GlobalMinGasPrice") | ||
| } | ||
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| gasInt := sdk.NewIntFromUint64(gas) | ||
| minFee := globalMinGasPrice.MulInt(gasInt).TruncateInt() | ||
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| // Determine the required fees by multiplying each required minimum gas | ||
| // price by the gas limit, where fee = ceil(minGasPrice * gasLimit). | ||
| glDec := sdk.NewDec(int64(gas)) | ||
| for i, gp := range minGasPrices { | ||
| fee := gp.Amount.Mul(glDec) | ||
| requiredFees[i] = sdk.NewCoin(gp.Denom, fee.Ceil().RoundInt()) | ||
| } | ||
| // if min fee truncates to zero, set it to one | ||
| if minFee.LT(sdk.NewInt(appconsts.MinFee)) { | ||
| minFee = sdk.NewInt(appconsts.MinFee) | ||
| } | ||
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| if !feeCoins.IsAnyGTE(requiredFees) { | ||
| return nil, 0, errors.Wrapf(sdkerror.ErrInsufficientFee, "insufficient fees; got: %s required: %s", feeCoins, requiredFees) | ||
| } | ||
| if !fee.GTE(minFee) { |
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[no change needed] we may want to compare / contrast this implementation with https://github.com/skip-mev/feemarket/blob/e6f642fbeac30f78ec7061e2f7b23a6371bf0e85/x/feemarket/ante/fee.go#L76-L103
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I think the main thing we should be wary of is this implementation assumes only a single token whereas skip's implementation allows for multiple native tokens. At the moment we only have one token and I don't see that changing in the foreseeable future but maybe we want to avoid the footgun in the future
Co-authored-by: Rootul P <[email protected]>
Resolves babylonlabs-io/pm#49 This PR introduces the in-protocol minimum gas price mechanism, in which the consensus (more specifically the AnteHandler) enforces every tx has to set a gas price at least 0.002 ubbn. The PR also provides relevant tests. The impl closely follows celestiaorg/celestia-app#2985. In addition, this PR creates a new package `app/ante` to abstract out the construction of the AnteHandler for Babylon, following the practice at Celestia. - RFC: babylonlabs-io/pm#56 - ADR: babylonlabs-io/pm#61
Overview
Fixes - #1621
Introducing a global minimum gas price, a consensus change enforcing a lower bound for all transactions.
sidenote - updated the fee markets section in the docs but since I haven't yet been able to thoroughly read the specs section please do point out if I missed something.
Checklist