53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package stack
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import (
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"github.com/tendermint/basecoin"
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"github.com/tendermint/basecoin/state"
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)
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//nolint
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const (
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NameCheckpoint = "check"
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)
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// Checkpoint isolates all data store below this
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type Checkpoint struct {
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OnCheck bool
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OnDeliver bool
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PassInitState
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PassInitValidate
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}
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// Name of the module - fulfills Middleware interface
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func (Checkpoint) Name() string {
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return NameCheckpoint
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}
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var _ Middleware = Checkpoint{}
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// CheckTx reverts all data changes if there was an error
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func (c Checkpoint) CheckTx(ctx basecoin.Context, store state.SimpleDB, tx basecoin.Tx, next basecoin.Checker) (res basecoin.CheckResult, err error) {
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if !c.OnCheck {
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return next.CheckTx(ctx, store, tx)
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}
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ps := store.Checkpoint()
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res, err = next.CheckTx(ctx, ps, tx)
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if err == nil {
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err = store.Commit(ps)
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}
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return res, err
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}
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// DeliverTx reverts all data changes if there was an error
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func (c Checkpoint) DeliverTx(ctx basecoin.Context, store state.SimpleDB, tx basecoin.Tx, next basecoin.Deliver) (res basecoin.DeliverResult, err error) {
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if !c.OnDeliver {
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return next.DeliverTx(ctx, store, tx)
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}
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ps := store.Checkpoint()
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res, err = next.DeliverTx(ctx, ps, tx)
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if err == nil {
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err = store.Commit(ps)
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}
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return res, err
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}
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