dps

type Chain interface {
	Root() (uint64, error)
	Header(height uint64) (*flow.Header, error)
	Commit(height uint64) (flow.StateCommitment, error)
	Events(height uint64) ([]flow.Event, error)
	Collections(height uint64) ([]*flow.LightCollection, error)
	Transactions(height uint64) ([]*flow.TransactionBody, error)
}

type Codec interface {
	Encode(value interface{}) ([]byte, error)
	Compress(data []byte) ([]byte, error)

	Decode(data []byte, value interface{}) error
	Decompress(compressed []byte) ([]byte, error)

	Marshal(value interface{}) ([]byte, error)
	Unmarshal(compressed []byte, value interface{}) error
}

type Library interface {
	ReadLibrary
	WriteLibrary
}

type Params struct {
	ChainID          flow.ChainID
	FungibleToken    flow.Address
	FlowFees         flow.Address
	StakingTable     flow.Address
	LockedTokens     flow.Address
	StakingProxy     flow.Address
	NonFungibleToken flow.Address
	Tokens           map[string]Token
}

type ReadLibrary interface {
	RetrieveFirst(height *uint64) func(*badger.Txn) error
	RetrieveLast(height *uint64) func(*badger.Txn) error

	LookupHeightForBlock(blockID flow.Identifier, height *uint64) func(*badger.Txn) error

	RetrieveCommit(height uint64, commit *flow.StateCommitment) func(*badger.Txn) error
	RetrieveHeader(height uint64, header *flow.Header) func(*badger.Txn) error
	RetrieveEvents(height uint64, types []flow.EventType, events *[]flow.Event) func(*badger.Txn) error
	RetrievePayload(height uint64, path ledger.Path, payload *ledger.Payload) func(*badger.Txn) error

	LookupTransactionsForHeight(height uint64, txIDs *[]flow.Identifier) func(*badger.Txn) error
	LookupTransactionsForCollection(collID flow.Identifier, txIDs *[]flow.Identifier) func(*badger.Txn) error
	LookupCollectionsForHeight(height uint64, collIDs *[]flow.Identifier) func(*badger.Txn) error

	RetrieveCollection(collID flow.Identifier, collection *flow.LightCollection) func(*badger.Txn) error
	RetrieveTransaction(txID flow.Identifier, transaction *flow.TransactionBody) func(*badger.Txn) error
}

type Reader interface {
	First() (uint64, error)
	Last() (uint64, error)

	HeightForBlock(blockID flow.Identifier) (uint64, error)

	Commit(height uint64) (flow.StateCommitment, error)
	Header(height uint64) (*flow.Header, error)
	Events(height uint64, types ...flow.EventType) ([]flow.Event, error)
	Values(height uint64, paths []ledger.Path) ([]ledger.Value, error)

	Transaction(txID flow.Identifier) (*flow.TransactionBody, error)

	TransactionsByHeight(height uint64) ([]flow.Identifier, error)
}

type Token struct {
	Symbol   string
	Address  flow.Address
	Type     string
	Vault    string
	Receiver string
	Balance  string
}

type WriteLibrary interface {
	SaveFirst(height uint64) func(*badger.Txn) error
	SaveLast(height uint64) func(*badger.Txn) error

	IndexHeightForBlock(blockID flow.Identifier, height uint64) func(*badger.Txn) error

	SaveCommit(height uint64, commit flow.StateCommitment) func(*badger.Txn) error
	SaveHeader(height uint64, header *flow.Header) func(*badger.Txn) error
	SaveEvents(height uint64, typ flow.EventType, events []flow.Event) func(*badger.Txn) error
	SavePayload(height uint64, path ledger.Path, payload *ledger.Payload) func(*badger.Txn) error

	IndexTransactionsForHeight(height uint64, txIDs []flow.Identifier) func(*badger.Txn) error
	IndexTransactionsForCollection(collID flow.Identifier, txIDs []flow.Identifier) func(*badger.Txn) error
	IndexCollectionsForHeight(height uint64, collIDs []flow.Identifier) func(*badger.Txn) error

	SaveCollection(collection *flow.LightCollection) func(*badger.Txn) error
	SaveTransaction(transaction *flow.TransactionBody) func(*badger.Txn) error
}

type Writer interface {
	First(height uint64) error
	Last(height uint64) error

	Height(blockID flow.Identifier, height uint64) error

	Commit(height uint64, commit flow.StateCommitment) error
	Header(height uint64, header *flow.Header) error
	Events(height uint64, events []flow.Event) error
	Payloads(height uint64, paths []ledger.Path, values []*ledger.Payload) error

	Collections(height uint64, collections []*flow.LightCollection) error
	Transactions(height uint64, transactions []*flow.TransactionBody) error
}