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fetcher.go
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fetcher.go
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package tools
import (
"github.com/FactomProject/factom"
"github.com/FactomProject/factomd/common/adminBlock"
"github.com/FactomProject/factomd/common/directoryBlock"
"github.com/FactomProject/factomd/common/entryBlock"
"github.com/FactomProject/factomd/common/entryCreditBlock"
"github.com/FactomProject/factomd/common/factoid"
"github.com/FactomProject/factomd/common/interfaces"
"github.com/FactomProject/factomd/common/primitives"
"github.com/FactomProject/factomd/database/databaseOverlay"
"github.com/FactomProject/factomd/database/hybridDB"
)
const level string = "level"
const bolt string = "bolt"
type Fetcher interface {
SetChainHeads(primaryIndexes, chainIDs []interfaces.IHash) error
FetchDBlockHead() (interfaces.IDirectoryBlock, error)
//FetchDBlock(hash interfaces.IHash) (interfaces.IDirectoryBlock, error)
FetchHeadIndexByChainID(chainID interfaces.IHash) (interfaces.IHash, error)
FetchEBlock(hash interfaces.IHash) (interfaces.IEntryBlock, error)
FetchEntry(hash interfaces.IHash) (interfaces.IEBEntry, error)
FetchDBlockByHeight(dBlockHeight uint32) (interfaces.IDirectoryBlock, error)
FetchABlockByHeight(blockHeight uint32) (interfaces.IAdminBlock, error)
FetchFBlockByHeight(blockHeight uint32) (interfaces.IFBlock, error)
FetchECBlockByHeight(blockHeight uint32) (interfaces.IEntryCreditBlock, error)
FetchECBlockByPrimary(keymr interfaces.IHash) (interfaces.IEntryCreditBlock, error)
}
var _ Fetcher = (*APIReader)(nil)
var _ Fetcher = (*databaseOverlay.Overlay)(nil)
func NewDBReader(levelBolt string, path string) *databaseOverlay.Overlay {
var dbase *hybridDB.HybridDB
var err error
if levelBolt == bolt {
dbase = hybridDB.NewBoltMapHybridDB(nil, path)
} else {
dbase, err = hybridDB.NewLevelMapHybridDB(path, false)
if err != nil {
panic(err)
}
}
dbo := databaseOverlay.NewOverlay(dbase)
return dbo
}
type APIReader struct {
location string
}
func NewAPIReader(loc string) *APIReader {
a := new(APIReader)
a.location = loc
factom.SetFactomdServer(loc)
return a
}
func (a *APIReader) SetChainHeads(primaryIndexes, chainIDs []interfaces.IHash) error {
return nil
}
func (a *APIReader) FetchEntry(hash interfaces.IHash) (interfaces.IEBEntry, error) {
raw, err := factom.GetRaw(hash.String())
if err != nil {
return nil, err
}
entry := entryBlock.NewEntry()
err = UnmarshalGeneric(entry, raw)
return entry, err
}
func (a *APIReader) FetchEBlock(hash interfaces.IHash) (interfaces.IEntryBlock, error) {
raw, err := factom.GetRaw(hash.String())
if err != nil {
return nil, err
}
block := entryBlock.NewEBlock()
err = UnmarshalGeneric(block, raw)
return block, err
}
func (a *APIReader) FetchDBlockHead() (interfaces.IDirectoryBlock, error) {
head, err := factom.GetDBlockHead()
if err != nil {
return nil, err
}
raw, err := factom.GetRaw(head)
if err != nil {
return nil, err
}
block := directoryBlock.NewDirectoryBlock(nil)
err = UnmarshalGeneric(block, raw)
return block, err
}
func (a *APIReader) FetchDBlockByHeight(height uint32) (interfaces.IDirectoryBlock, error) {
_, data, err := factom.GetDBlockByHeight(int64(height))
if err != nil {
return nil, err
}
block := directoryBlock.NewDirectoryBlock(nil)
err = UnmarshalGeneric(block, data)
return block, err
}
func (a *APIReader) FetchFBlockByHeight(height uint32) (interfaces.IFBlock, error) {
_, data, err := factom.GetFBlockByHeight(int64(height))
if err != nil {
return nil, err
}
block := factoid.NewFBlock(nil)
err = UnmarshalGeneric(block, data)
return block, err
}
func (a *APIReader) FetchABlockByHeight(height uint32) (interfaces.IAdminBlock, error) {
_, data, err := factom.GetABlockByHeight(int64(height))
if err != nil {
return nil, err
}
ablock := adminBlock.NewAdminBlock(nil)
err = UnmarshalGeneric(ablock, data)
return ablock, err
}
func (a *APIReader) FetchECBlockByPrimary(keymr interfaces.IHash) (interfaces.IEntryCreditBlock, error) {
data, err := factom.GetRaw(keymr.String())
if err != nil {
return nil, err
}
ecblock := entryCreditBlock.NewECBlock()
err = UnmarshalGeneric(ecblock, data)
return ecblock, err
}
func (a *APIReader) FetchECBlockByHeight(height uint32) (interfaces.IEntryCreditBlock, error) {
_, data, err := factom.GetECBlockByHeight(int64(height))
if err != nil {
return nil, err
}
ecblock := entryCreditBlock.NewECBlock()
err = UnmarshalGeneric(ecblock, data)
return ecblock, err
}
func (a *APIReader) FetchHeadIndexByChainID(chainID interfaces.IHash) (interfaces.IHash, error) {
resp, _, err := factom.GetChainHead(chainID.String())
if err != nil {
return nil, err
}
return primitives.HexToHash(resp)
}
func UnmarshalGeneric(i interfaces.BinaryMarshallable, raw []byte) error {
err := i.UnmarshalBinary(raw)
if err != nil {
return err
}
return nil
}