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48 lines
1.5 KiB
48 lines
1.5 KiB
package store
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import "github.com/tendermint/tendermint/types"
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// Store is anything that can persistently store headers.
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type Store interface {
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// SaveSignedHeaderAndValidatorSet saves a SignedHeader (h: sh.Height) and a
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// ValidatorSet (h: sh.Height).
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//
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// height must be > 0.
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SaveLightBlock(lb *types.LightBlock) error
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// DeleteSignedHeaderAndValidatorSet deletes SignedHeader (h: height) and
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// ValidatorSet (h: height).
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//
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// height must be > 0.
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DeleteLightBlock(height int64) error
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// LightBlock returns the LightBlock that corresponds to the given
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// height.
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//
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// height must be > 0.
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//
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// If LightBlock is not found, ErrLightBlockNotFound is returned.
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LightBlock(height int64) (*types.LightBlock, error)
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// LastLightBlockHeight returns the last (newest) LightBlock height.
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//
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// If the store is empty, -1 and nil error are returned.
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LastLightBlockHeight() (int64, error)
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// FirstLightBlockHeight returns the first (oldest) LightBlock height.
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//
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// If the store is empty, -1 and nil error are returned.
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FirstLightBlockHeight() (int64, error)
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// LightBlockBefore returns the LightBlock before a certain height.
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//
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// height must be > 0 && <= LastLightBlockHeight.
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LightBlockBefore(height int64) (*types.LightBlock, error)
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// Prune removes headers & the associated validator sets when Store reaches a
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// defined size (number of header & validator set pairs).
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Prune(size uint16) error
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// Size returns a number of currently existing header & validator set pairs.
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Size() uint16
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}
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