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proposals.go
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/
proposals.go
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package state
import (
"github.com/klyed/hivesmartchain/encoding"
"github.com/klyed/hivesmartchain/execution/proposal"
"github.com/klyed/hivesmartchain/txs/payload"
)
var _ proposal.IterableReader = &State{}
func (s *ReadState) GetProposal(proposalHash []byte) (*payload.Ballot, error) {
tree, err := s.Forest.Reader(keys.Proposal.Prefix())
if err != nil {
return nil, err
}
bs, err := tree.Get(keys.Proposal.KeyNoPrefix(proposalHash))
if err != nil {
return nil, err
} else if len(bs) == 0 {
return nil, nil
}
ballot := new(payload.Ballot)
err = encoding.Decode(bs, ballot)
if err != nil {
return nil, err
}
return ballot, nil
}
func (ws *writeState) UpdateProposal(proposalHash []byte, p *payload.Ballot) error {
tree, err := ws.forest.Writer(keys.Proposal.Prefix())
if err != nil {
return err
}
bs, err := encoding.Encode(p)
if err != nil {
return err
}
tree.Set(keys.Proposal.KeyNoPrefix(proposalHash), bs)
return nil
}
func (ws *writeState) RemoveProposal(proposalHash []byte) error {
tree, err := ws.forest.Writer(keys.Proposal.Prefix())
if err != nil {
return err
}
tree.Delete(keys.Proposal.KeyNoPrefix(proposalHash))
return nil
}
func (s *ReadState) IterateProposals(consumer func(proposalHash []byte, proposal *payload.Ballot) error) error {
tree, err := s.Forest.Reader(keys.Proposal.Prefix())
if err != nil {
return err
}
return tree.Iterate(nil, nil, true, func(key []byte, value []byte) error {
ballot := new(payload.Ballot)
err := encoding.Decode(value, ballot)
if err != nil {
return err
}
return consumer(key, ballot)
})
}