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use AccountNumberDecorator to avoid account number collision (#220)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| package ante | ||
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| import ( | ||
| storetypes "cosmossdk.io/store/types" | ||
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| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| cosmosante "github.com/cosmos/cosmos-sdk/x/auth/ante" | ||
| authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper" | ||
| ) | ||
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| // AccountNumberDecorator is a custom ante handler that increments the account number depending on | ||
| // the execution mode (Simulate, CheckTx, Finalize). | ||
| // | ||
| // This is to avoid account number conflicts when running concurrent Simulate, CheckTx, and Finalize. | ||
| type AccountNumberDecorator struct { | ||
| ak cosmosante.AccountKeeper | ||
| } | ||
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| // NewAccountNumberDecorator creates a new instance of AccountNumberDecorator. | ||
| func NewAccountNumberDecorator(ak cosmosante.AccountKeeper) AccountNumberDecorator { | ||
| return AccountNumberDecorator{ak} | ||
| } | ||
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| // AnteHandle is the AnteHandler implementation for AccountNumberDecorator. | ||
| func (and AccountNumberDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) { | ||
| if !ctx.IsCheckTx() && !ctx.IsReCheckTx() && !simulate { | ||
| return next(ctx, tx, simulate) | ||
| } | ||
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| ak := and.ak.(*authkeeper.AccountKeeper) | ||
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| gasFreeCtx := ctx.WithGasMeter(storetypes.NewInfiniteGasMeter()) | ||
| num, err := ak.AccountNumber.Peek(gasFreeCtx) | ||
| if err != nil { | ||
| return ctx, err | ||
| } | ||
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| accountNumAddition := uint64(1_000_000) | ||
| if simulate { | ||
| accountNumAddition += 1_000_000 | ||
| } | ||
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| if err := ak.AccountNumber.Set(gasFreeCtx, num+accountNumAddition); err != nil { | ||
| return ctx, err | ||
| } | ||
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| return next(ctx, tx, simulate) | ||
| } |
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