package store import "github.com/tendermint/tendermint/types" // Store is anything that can persistenly store headers. type Store interface { // SaveSignedHeaderAndNextValidatorSet saves a SignedHeader (h: sh.Height) // and a ValidatorSet (h: sh.Height+1). // // height must be > 0. SaveSignedHeaderAndNextValidatorSet(sh *types.SignedHeader, valSet *types.ValidatorSet) error // DeleteSignedHeaderAndNextValidatorSet deletes SignedHeader (h: height) and // ValidatorSet (h: height+1). // // height must be > 0. DeleteSignedHeaderAndNextValidatorSet(height int64) error // SignedHeader returns the SignedHeader that corresponds to the given // height. // // height must be > 0. // // If SignedHeader is not found, ErrSignedHeaderNotFound is returned. SignedHeader(height int64) (*types.SignedHeader, error) // ValidatorSet returns the ValidatorSet that corresponds to height. // // height must be > 0. // // If ValidatorSet is not found, ErrValidatorSetNotFound is returned. ValidatorSet(height int64) (*types.ValidatorSet, error) // LastSignedHeaderHeight returns the last (newest) SignedHeader height. // // If the store is empty, -1 and nil error are returned. LastSignedHeaderHeight() (int64, error) // FirstSignedHeaderHeight returns the first (oldest) SignedHeader height. // // If the store is empty, -1 and nil error are returned. FirstSignedHeaderHeight() (int64, error) // SignedHeaderAfter returns the SignedHeader after the certain height. // // height must be > 0 && <= LastSignedHeaderHeight. SignedHeaderAfter(height int64) (*types.SignedHeader, error) }