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sharding: fetch body by chunk root

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Former-commit-id: 5021890d223501bf163d6beae4e4e732673950d2 [formerly 92e89aed0c61909971cf9262cd3002bf2ae2328a]
Former-commit-id: 0fd4497f880213878965107de3f782b44c33f065
This commit is contained in:
Raul Jordan 2018-05-03 11:54:05 -05:00
parent 84a2cb08d7
commit 1793e7d21d
2 changed files with 19 additions and 10 deletions
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8
sharding/db.go
View File

@ -6,11 +6,11 @@ import (
"github.com/ethereum/go-ethereum/common"
)
type shardBackend struct {
type shardKV struct {
kv map[common.Hash][]byte
}
func (sb *shardBackend) Get(k common.Hash) ([]byte, error) {
func (sb *shardKV) Get(k common.Hash) ([]byte, error) {
v := sb.kv[k]
if v == nil {
return nil, fmt.Errorf("Key Not Found")
@ -18,12 +18,12 @@ func (sb *shardBackend) Get(k common.Hash) ([]byte, error) {
return v, nil
}
func (sb *shardBackend) Put(k common.Hash, v []byte) {
func (sb *shardKV) Put(k common.Hash, v []byte) {
sb.kv[k] = v
return
}
func (sb *shardBackend) Delete(k common.Hash) {
func (sb *shardKV) Delete(k common.Hash) {
delete(sb.kv, k)
return
}

21
sharding/shard.go
View File

@ -10,7 +10,7 @@ import (
// Shard base struct.
type Shard struct {
shardDB *shardBackend
shardDB *shardKV
shardID *big.Int
}
@ -22,8 +22,8 @@ func (s *Shard) ValidateShardID(h *CollationHeader) error {
return nil
}
// SetHeader adds the collation header to shardDB
func (s *Shard) SetHeader(h *CollationHeader) error {
// SaveHeader adds the collation header to shardDB.
func (s *Shard) SaveHeader(h *CollationHeader) error {
if err := s.ValidateShardID(h); err != nil {
return err
}
@ -35,6 +35,15 @@ func (s *Shard) SetHeader(h *CollationHeader) error {
return nil
}
// SaveCollationBody adds the collation body to shardDB.
func (s *Shard) SaveCollationBody(body []byte) error {
// TODO: dependent on blob serialization.
// chunkRoot := getChunkRoot(body) using the blob algorithm utils.
// s.shardDB.Put(chunkRoot, body)
// s.SetAvailability(chunkRoot, true)
return nil
}
// GetHeaderByHash of collation.
func (s *Shard) GetHeaderByHash(hash common.Hash) (*CollationHeader, error) {
encoded, err := s.shardDB.Get(hash)
@ -61,7 +70,7 @@ func (s *Shard) GetCollationByHash(hash common.Hash) (*Collation, error) {
return &Collation{header: header, body: body}, nil
}
// GetBodyByChunkRoot fetches a collation body
// GetBodyByChunkRoot fetches a collation body.
func (s *Shard) GetBodyByChunkRoot(chunkRoot common.Hash) ([]byte, error) {
body, err := s.shardDB.Get(chunkRoot)
if err != nil {
@ -75,7 +84,7 @@ func (s *Shard) CheckAvailability(header *CollationHeader) bool {
return true
}
// SetUnavailable ensures to set a collation as unavailable in the shardDB.
func (s *Shard) SetUnavailable(header *CollationHeader) error {
// SetAvailability saves the availability of the chunk root in the shardDB.
func (s *Shard) SetAvailability(chunkRoot *common.Hash) error {
return nil
}