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proposals.go
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/
proposals.go
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package state
import (
"fmt"
"github.com/hyperledger/burrow/execution/proposal"
"github.com/hyperledger/burrow/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 := tree.Get(keys.Proposal.KeyNoPrefix(proposalHash))
if len(bs) == 0 {
return nil, nil
}
return payload.DecodeBallot(bs)
}
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 := p.Encode()
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 {
entry, err := payload.DecodeBallot(value)
if err != nil {
return fmt.Errorf("State.IterateProposal() could not iterate over proposals: %v", err)
}
return consumer(key, entry)
})
}