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40 lines
1.2 KiB
40 lines
1.2 KiB
package types
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import (
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"fmt"
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"time"
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"github.com/tendermint/tendermint/crypto/tmhash"
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tmtime "github.com/tendermint/tendermint/types/time"
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)
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// ValidateTime does a basic time validation ensuring time does not drift too
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// much: +/- one year.
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// TODO: reduce this to eg 1 day
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// NOTE: DO NOT USE in ValidateBasic methods in this package. This function
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// can only be used for real time validation, like on proposals and votes
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// in the consensus. If consensus is stuck, and rounds increase for more than a day,
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// having only a 1-day band here could break things...
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// Can't use for validating blocks because we may be syncing years worth of history.
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func ValidateTime(t time.Time) error {
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var (
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now = tmtime.Now()
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oneYear = 8766 * time.Hour
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)
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if t.Before(now.Add(-oneYear)) || t.After(now.Add(oneYear)) {
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return fmt.Errorf("time drifted too much. Expected: -1 < %v < 1 year", now)
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}
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return nil
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}
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// ValidateHash returns an error if the hash is not empty, but its
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// size != tmhash.Size.
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func ValidateHash(h []byte) error {
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if len(h) > 0 && len(h) != tmhash.Size {
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return fmt.Errorf("expected size to be %d bytes, got %d bytes",
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tmhash.Size,
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len(h),
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)
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}
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return nil
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}
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