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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| package ante | ||
|
|
||
| import ( | ||
| "encoding/hex" | ||
|
|
||
| "cosmossdk.io/errors" | ||
| "github.com/celestiaorg/celestia-app/v3/pkg/appconsts" | ||
| v2 "github.com/celestiaorg/celestia-app/v3/pkg/appconsts/v2" | ||
| "github.com/cosmos/cosmos-sdk/codec/legacy" | ||
| "github.com/cosmos/cosmos-sdk/crypto/keys/multisig" | ||
| "github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1" | ||
| cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types" | ||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| sdkerrors "github.com/cosmos/cosmos-sdk/types/errors" | ||
| "github.com/cosmos/cosmos-sdk/types/tx/signing" | ||
| "github.com/cosmos/cosmos-sdk/x/auth/ante" | ||
| "github.com/cosmos/cosmos-sdk/x/auth/migrations/legacytx" | ||
| authsigning "github.com/cosmos/cosmos-sdk/x/auth/signing" | ||
| auth "github.com/cosmos/cosmos-sdk/x/auth/types" | ||
| ) | ||
|
|
||
| var ( | ||
| // Simulation signature values used to estimate gas consumption. | ||
| key = make([]byte, secp256k1.PubKeySize) | ||
| simSecp256k1Pubkey = &secp256k1.PubKey{Key: key} | ||
| simSecp256k1Sig [64]byte | ||
| ) | ||
|
|
||
| func init() { | ||
| // Decodes a valid hex string into a sepc256k1Pubkey for use in transaction simulation | ||
| bz, _ := hex.DecodeString("035AD6810A47F073553FF30D2FCC7E0D3B1C0B74B61A1AAA2582344037151E143A") | ||
| copy(key, bz) | ||
| simSecp256k1Pubkey.Key = key | ||
| } | ||
|
|
||
| // ConsumeTxSizeGasDecorator will take in parameters and consume gas proportional | ||
| // to the size of tx before calling next AnteHandler. Note, the gas costs will be | ||
| // slightly over estimated due to the fact that any given signing account may need | ||
| // to be retrieved from state. | ||
| // | ||
| // CONTRACT: If simulate=true, then signatures must either be completely filled | ||
| // in or empty. | ||
| // CONTRACT: To use this decorator, signatures of transaction must be represented | ||
| // as legacytx.StdSignature otherwise simulate mode will incorrectly estimate gas cost. | ||
|
|
||
| // The code was copied from celestia's fork of the cosmos-sdk: | ||
| // https://github.com/celestiaorg/cosmos-sdk/blob/release/v0.46.x-celestia/x/auth/ante/basic.go | ||
| // In app versions v2 and below, the txSizeCostPerByte used for gas cost estimation is taken from the auth module. | ||
| // In app v3 and above, the versioned constant appconsts.TxSizeCostPerByte is used. | ||
| type ConsumeTxSizeGasDecorator struct { | ||
| ak ante.AccountKeeper | ||
| } | ||
|
|
||
| func NewConsumeGasForTxSizeDecorator(ak ante.AccountKeeper) ConsumeTxSizeGasDecorator { | ||
| return ConsumeTxSizeGasDecorator{ | ||
| ak: ak, | ||
| } | ||
| } | ||
|
|
||
| func (cgts ConsumeTxSizeGasDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) { | ||
| sigTx, ok := tx.(authsigning.SigVerifiableTx) | ||
| if !ok { | ||
| return ctx, errors.Wrap(sdkerrors.ErrTxDecode, "invalid tx type") | ||
| } | ||
| params := cgts.ak.GetParams(ctx) | ||
|
|
||
| consumeGasForTxSize(ctx, sdk.Gas(len(ctx.TxBytes())), params) | ||
|
|
||
| // simulate gas cost for signatures in simulate mode | ||
| if simulate { | ||
| // in simulate mode, each element should be a nil signature | ||
| sigs, err := sigTx.GetSignaturesV2() | ||
| if err != nil { | ||
| return ctx, err | ||
| } | ||
| n := len(sigs) | ||
|
|
||
| for i, signer := range sigTx.GetSigners() { | ||
| // if signature is already filled in, no need to simulate gas cost | ||
| if i < n && !isIncompleteSignature(sigs[i].Data) { | ||
| continue | ||
| } | ||
|
|
||
| var pubkey cryptotypes.PubKey | ||
|
|
||
| acc := cgts.ak.GetAccount(ctx, signer) | ||
|
|
||
| // use placeholder simSecp256k1Pubkey if sig is nil | ||
| if acc == nil || acc.GetPubKey() == nil { | ||
| pubkey = simSecp256k1Pubkey | ||
| } else { | ||
| pubkey = acc.GetPubKey() | ||
| } | ||
|
|
||
| // use stdsignature to mock the size of a full signature | ||
| simSig := legacytx.StdSignature{ //nolint:staticcheck // this will be removed when proto is ready | ||
| Signature: simSecp256k1Sig[:], | ||
| PubKey: pubkey, | ||
| } | ||
|
|
||
| sigBz := legacy.Cdc.MustMarshal(simSig) | ||
| txBytes := sdk.Gas(len(sigBz) + 6) | ||
|
|
||
| // If the pubkey is a multi-signature pubkey, then we estimate for the maximum | ||
| // number of signers. | ||
| if _, ok := pubkey.(*multisig.LegacyAminoPubKey); ok { | ||
| txBytes *= params.TxSigLimit | ||
| } | ||
|
|
||
| consumeGasForTxSize(ctx, txBytes, params) | ||
| } | ||
| } | ||
|
|
||
| return next(ctx, tx, simulate) | ||
| } | ||
|
|
||
| // isIncompleteSignature tests whether SignatureData is fully filled in for simulation purposes | ||
| func isIncompleteSignature(data signing.SignatureData) bool { | ||
| if data == nil { | ||
| return true | ||
| } | ||
|
|
||
| switch data := data.(type) { | ||
| case *signing.SingleSignatureData: | ||
| return len(data.Signature) == 0 | ||
| case *signing.MultiSignatureData: | ||
| if len(data.Signatures) == 0 { | ||
| return true | ||
| } | ||
| for _, s := range data.Signatures { | ||
| if isIncompleteSignature(s) { | ||
| return true | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return false | ||
| } | ||
|
|
||
| // consumeGasForTxSize consumes gas based on the size of the transaction. | ||
| // It uses different parameters depending on the app version. | ||
| func consumeGasForTxSize(ctx sdk.Context, txBytes uint64, params auth.Params) { | ||
| // For app v2 and below we should get txSizeCostPerByte from auth module | ||
| if ctx.BlockHeader().Version.App <= v2.Version { | ||
| ctx.GasMeter().ConsumeGas(params.TxSizeCostPerByte*txBytes, "txSize") | ||
| } else { | ||
| // From v3 onwards, we should get txSizeCostPerByte from appconsts | ||
| txSizeCostPerByte := appconsts.TxSizeCostPerByte(ctx.BlockHeader().Version.App) | ||
| ctx.GasMeter().ConsumeGas(txSizeCostPerByte*txBytes, "txSize") | ||
| } | ||
| } |
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