71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
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package consensus
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import (
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"encoding/hex"
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"github.com/Secured-Finance/dione/models"
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"github.com/Secured-Finance/dione/sigs"
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"github.com/Secured-Finance/dione/types"
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)
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type PrePreparePool struct {
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prePrepareMsgs map[string][]*models.Message
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}
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func NewPrePreparePool() *PrePreparePool {
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return &PrePreparePool{
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prePrepareMsgs: map[string][]*models.Message{},
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}
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}
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func (pp *PrePreparePool) CreatePrePrepare(consensusID, data string, requestID string, callbackAddress string, privateKey []byte) (*models.Message, error) {
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var message models.Message
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message.Type = models.MessageTypePrePrepare
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var consensusMsg models.ConsensusMessage
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consensusMsg.ConsensusID = consensusID
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consensusMsg.RequestID = requestID
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consensusMsg.CallbackAddress = callbackAddress
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consensusMsg.Data = data
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signature, err := sigs.Sign(types.SigTypeEd25519, privateKey, []byte(data))
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if err != nil {
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return nil, err
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}
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consensusMsg.Signature = hex.EncodeToString(signature.Data)
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message.Payload = consensusMsg
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return &message, nil
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}
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func (ppp *PrePreparePool) IsExistingPrePrepare(prepareMsg *models.Message) bool {
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consensusMessage := prepareMsg.Payload
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var exists bool
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for _, v := range ppp.prePrepareMsgs[consensusMessage.ConsensusID] {
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if v.From == prepareMsg.From {
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exists = true
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}
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}
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return exists
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}
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func (ppp *PrePreparePool) IsValidPrePrepare(prePrepare *models.Message) bool {
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// TODO here we need to do validation of tx itself
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consensusMsg := prePrepare.Payload
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buf, err := hex.DecodeString(consensusMsg.Signature)
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if err != nil {
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return false
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}
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err = sigs.Verify(&types.Signature{Type: types.SigTypeEd25519, Data: buf}, prePrepare.From, []byte(consensusMsg.Data))
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if err != nil {
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return false
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}
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return true
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}
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func (ppp *PrePreparePool) AddPrePrepare(prePrepare *models.Message) {
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consensusID := prePrepare.Payload.ConsensusID
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if _, ok := ppp.prePrepareMsgs[consensusID]; !ok {
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ppp.prePrepareMsgs[consensusID] = []*models.Message{}
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}
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ppp.prePrepareMsgs[consensusID] = append(ppp.prePrepareMsgs[consensusID], prePrepare)
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}
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