54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
package middleware
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import (
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"context"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cosmos/cosmos-sdk/types/tx"
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)
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type consumeBlockGasHandler struct {
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next tx.Handler
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}
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// ConsumeBlockGasMiddleware check and consume block gas meter.
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func ConsumeBlockGasMiddleware(txh tx.Handler) tx.Handler {
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return consumeBlockGasHandler{next: txh}
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}
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var _ tx.Handler = consumeBlockGasHandler{}
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// CheckTx implements tx.Handler.CheckTx method.
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func (cbgh consumeBlockGasHandler) CheckTx(ctx context.Context, req tx.Request, checkReq tx.RequestCheckTx) (res tx.Response, resCheckTx tx.ResponseCheckTx, err error) {
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return cbgh.next.CheckTx(ctx, req, checkReq)
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}
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// DeliverTx implements tx.Handler.DeliverTx method.
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// Consume block gas meter, panic when block gas meter exceeded,
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// the panic should be caught by `RecoveryTxMiddleware`.
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func (cbgh consumeBlockGasHandler) DeliverTx(ctx context.Context, req tx.Request) (res tx.Response, err error) {
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sdkCtx := sdk.UnwrapSDKContext(ctx)
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// only run the tx if there is block gas remaining
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if sdkCtx.BlockGasMeter().IsOutOfGas() {
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err = sdkerrors.Wrap(sdkerrors.ErrOutOfGas, "no block gas left to run tx")
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return
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}
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// If BlockGasMeter() panics it will be caught by the `RecoveryTxMiddleware` and will
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// return an error - in any case BlockGasMeter will consume gas past the limit.
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defer func() {
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sdkCtx.BlockGasMeter().ConsumeGas(
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sdkCtx.GasMeter().GasConsumedToLimit(), "block gas meter",
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)
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}()
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return cbgh.next.DeliverTx(ctx, req)
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}
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// SimulateTx implements tx.Handler.SimulateTx method.
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func (cbgh consumeBlockGasHandler) SimulateTx(ctx context.Context, req tx.Request) (res tx.Response, err error) {
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return cbgh.next.SimulateTx(ctx, req)
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}
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