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signature.go
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signature.go
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package signature
import (
"encoding/json"
"errors"
"fmt"
"github.com/lidofinance/dc4bc/client/modules/state"
"github.com/lidofinance/dc4bc/fsm/types"
)
const (
SignaturesKeyPrefix = "signatures"
)
type SignaturesStorage map[string]map[string][]types.ReconstructedSignature
func (s *SignaturesStorage) AddReconstructedSignature(reconstructedSignature types.ReconstructedSignature) {
batchSignatures, found := (*s)[reconstructedSignature.BatchID]
var signs []types.ReconstructedSignature
if found {
signs = batchSignatures[reconstructedSignature.MessageID]
} else {
batchSignatures = make(map[string][]types.ReconstructedSignature)
}
usernameFound := false
for i, s := range signs {
if s.Username == reconstructedSignature.Username {
signs[i] = reconstructedSignature
usernameFound = true
break
}
}
if !usernameFound {
signs = append(signs, reconstructedSignature)
}
batchSignatures[reconstructedSignature.MessageID] = signs
(*s)[reconstructedSignature.BatchID] = batchSignatures
}
type SignatureRepo interface {
SaveSignatures(signature []types.ReconstructedSignature) error
GetSignatureByID(dkgID, signatureID string) ([]types.ReconstructedSignature, error)
GetSignaturesByBatchID(dkgID, batchID string) (map[string][]types.ReconstructedSignature, error)
GetSignatures(dkgID string) (SignaturesStorage, error)
GetBatches(dkgID string) ([]string, error)
}
type BaseSignatureRepo struct {
state state.State
}
func NewSignatureRepo(state state.State) *BaseSignatureRepo {
return &BaseSignatureRepo{state}
}
func (r *BaseSignatureRepo) GetSignatures(dkgID string) (signatures SignaturesStorage, err error) {
key := state.MakeCompositeKeyString(SignaturesKeyPrefix, dkgID)
bz, err := r.state.Get(key)
if err != nil {
return nil, fmt.Errorf("failed to get signatures for dkgID %s: %w", dkgID, err)
}
if bz == nil {
return nil, nil
}
if err := json.Unmarshal(bz, &signatures); err != nil {
return nil, fmt.Errorf("failed to unmarshal signature: %w", err)
}
return signatures, nil
}
func (r *BaseSignatureRepo) GetSignaturesByBatchID(dkgID, batchID string) (map[string][]types.ReconstructedSignature, error) {
signatures, err := r.GetSignatures(dkgID)
if err != nil {
return nil, fmt.Errorf("failed to getSignatures: %w", err)
}
return signatures[batchID], nil
}
func (r *BaseSignatureRepo) GetSignatureByID(dkgID, signatureID string) ([]types.ReconstructedSignature, error) {
allSignatures, err := r.GetSignatures(dkgID)
if err != nil {
return nil, fmt.Errorf("failed to getSignatures: %w", err)
}
for _, batchSignatures := range allSignatures {
signature, ok := batchSignatures[signatureID]
if ok {
return signature, nil
}
}
return nil, errors.New("signature not found")
}
func (r *BaseSignatureRepo) SaveSignatures(signaturesToSave []types.ReconstructedSignature) error {
if len(signaturesToSave) == 0 {
return errors.New("nothing to save")
}
storedSignatures, err := r.GetSignatures(signaturesToSave[0].DKGRoundID)
if err != nil {
return fmt.Errorf("failed to getSignatures: %w", err)
}
if storedSignatures == nil {
storedSignatures = make(SignaturesStorage)
}
for _, signatureToSave := range signaturesToSave {
storedSignatures.AddReconstructedSignature(signatureToSave)
}
signaturesJSON, err := json.Marshal(storedSignatures)
if err != nil {
return fmt.Errorf("failed to marshal signatures: %w", err)
}
key := state.MakeCompositeKeyString(SignaturesKeyPrefix, signaturesToSave[0].DKGRoundID)
if err := r.state.Set(key, signaturesJSON); err != nil {
return fmt.Errorf("failed to save signatures: %w", err)
}
return nil
}
func (r *BaseSignatureRepo) GetBatches(dkgID string) ([]string, error) {
allSignatures := make(SignaturesStorage)
key := state.MakeCompositeKeyString(SignaturesKeyPrefix, dkgID)
allSignaturesbz, err := r.state.Get(key)
if err != nil {
return nil, fmt.Errorf("failed to read batch state from storage: %w", err)
} else if allSignaturesbz != nil {
err = json.Unmarshal(allSignaturesbz, &allSignatures)
if err != nil {
return nil, fmt.Errorf("failed to unmarshal batch state: %w", err)
}
}
batchIDS := make([]string, 0, len(allSignatures))
for batchID := range allSignatures {
batchIDS = append(batchIDS, batchID)
}
return batchIDS, nil
}