package provider import ( "github.com/tendermint/tendermint/types" ) // Provider provides information for the lite client to sync (verification // happens in the client). type Provider interface { // ChainID returns the blockchain ID. ChainID() string // SignedHeader returns the SignedHeader that corresponds to the given // height. // // 0 - the latest. // height must be >= 0. // // If the provider fails to fetch the SignedHeader due to the IO or other // issues, an error will be returned. // If there's no SignedHeader for the given height, ErrSignedHeaderNotFound // error is returned. SignedHeader(height int64) (*types.SignedHeader, error) // ValidatorSet returns the ValidatorSet that corresponds to height. // // 0 - the latest. // height must be >= 0. // // If the provider fails to fetch the ValidatorSet due to the IO or other // issues, an error will be returned. // If there's no ValidatorSet for the given height, ErrValidatorSetNotFound // error is returned. ValidatorSet(height int64) (*types.ValidatorSet, error) }