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params.go
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params.go
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package badger
import (
"fmt"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/state/protocol"
"github.com/onflow/flow-go/storage/badger/operation"
)
type Params struct {
state *State
}
var _ protocol.Params = (*Params)(nil)
func (p Params) ChainID() (flow.ChainID, error) {
// retrieve root header
root, err := p.Root()
if err != nil {
return "", fmt.Errorf("could not get root: %w", err)
}
return root.ChainID, nil
}
func (p Params) SporkID() (flow.Identifier, error) {
var sporkID flow.Identifier
err := p.state.db.View(operation.RetrieveSporkID(&sporkID))
if err != nil {
return flow.ZeroID, fmt.Errorf("could not get spork id: %w", err)
}
return sporkID, nil
}
func (p Params) SporkRootBlockHeight() (uint64, error) {
var sporkRootBlockHeight uint64
err := p.state.db.View(operation.RetrieveSporkRootBlockHeight(&sporkRootBlockHeight))
if err != nil {
return 0, fmt.Errorf("could not get spork root block height: %w", err)
}
return sporkRootBlockHeight, nil
}
func (p Params) ProtocolVersion() (uint, error) {
var version uint
err := p.state.db.View(operation.RetrieveProtocolVersion(&version))
if err != nil {
return 0, fmt.Errorf("could not get protocol version: %w", err)
}
return version, nil
}
func (p Params) EpochCommitSafetyThreshold() (uint64, error) {
var threshold uint64
err := p.state.db.View(operation.RetrieveEpochCommitSafetyThreshold(&threshold))
if err != nil {
return 0, fmt.Errorf("could not get epoch commit safety threshold")
}
return threshold, nil
}
func (p Params) EpochFallbackTriggered() (bool, error) {
var triggered bool
err := p.state.db.View(operation.CheckEpochEmergencyFallbackTriggered(&triggered))
if err != nil {
return false, fmt.Errorf("could not check epoch fallback triggered: %w", err)
}
return triggered, nil
}
func (p Params) Root() (*flow.Header, error) {
// look up root block ID
var rootID flow.Identifier
err := p.state.db.View(operation.LookupBlockHeight(p.state.rootHeight, &rootID))
if err != nil {
return nil, fmt.Errorf("could not look up root header: %w", err)
}
// retrieve root header
header, err := p.state.headers.ByBlockID(rootID)
if err != nil {
return nil, fmt.Errorf("could not retrieve root header: %w", err)
}
return header, nil
}
func (p Params) Seal() (*flow.Seal, error) {
// look up root header
var rootID flow.Identifier
err := p.state.db.View(operation.LookupBlockHeight(p.state.rootHeight, &rootID))
if err != nil {
return nil, fmt.Errorf("could not look up root header: %w", err)
}
// retrieve the root seal
seal, err := p.state.seals.HighestInFork(rootID)
if err != nil {
return nil, fmt.Errorf("could not retrieve root seal: %w", err)
}
return seal, nil
}