143 lines
2.6 KiB
Go
143 lines
2.6 KiB
Go
package deals
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import (
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"bytes"
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"github.com/filecoin-project/lotus/lib/cborrpc"
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"github.com/ipfs/go-cid"
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"github.com/ipfs/go-datastore"
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"github.com/ipfs/go-datastore/query"
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"golang.org/x/xerrors"
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)
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type StateStore struct {
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ds datastore.Datastore
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}
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func (st *StateStore) Begin(i cid.Cid, state interface{}) error {
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k := datastore.NewKey(i.String())
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has, err := st.ds.Has(k)
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if err != nil {
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return err
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}
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if has {
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return xerrors.Errorf("Already tracking state for %s", i)
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}
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b, err := cborrpc.Dump(state)
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if err != nil {
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return err
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}
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return st.ds.Put(k, b)
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}
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func (st *StateStore) End(i cid.Cid) error {
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k := datastore.NewKey(i.String())
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has, err := st.ds.Has(k)
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if err != nil {
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return err
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}
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if !has {
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return xerrors.Errorf("No state for %s", i)
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}
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return st.ds.Delete(k)
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}
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func (st *StateStore) mutate(i cid.Cid, mutator func([]byte) ([]byte, error)) error {
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k := datastore.NewKey(i.String())
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has, err := st.ds.Has(k)
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if err != nil {
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return err
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}
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if !has {
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return xerrors.Errorf("No state for %s", i)
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}
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cur, err := st.ds.Get(k)
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if err != nil {
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return err
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}
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mutated, err := mutator(cur)
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if err != nil {
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return err
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}
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return st.ds.Put(k, mutated)
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}
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type MinerStateStore struct {
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StateStore
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}
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func (st *MinerStateStore) MutateMiner(i cid.Cid, mutator func(*MinerDeal) error) error {
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return st.mutate(i, minerMutator(mutator))
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}
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func minerMutator(m func(*MinerDeal) error) func([]byte) ([]byte, error) {
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return func(in []byte) ([]byte, error) {
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deal := new(MinerDeal)
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err := cborrpc.ReadCborRPC(bytes.NewReader(in), deal)
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if err != nil {
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return nil, err
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}
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if err := m(deal); err != nil {
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return nil, err
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}
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return cborrpc.Dump(deal)
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}
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}
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type ClientStateStore struct {
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StateStore
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}
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func (st *ClientStateStore) MutateClient(i cid.Cid, mutator func(*ClientDeal) error) error {
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return st.mutate(i, clientMutator(mutator))
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}
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func clientMutator(m func(*ClientDeal) error) func([]byte) ([]byte, error) {
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return func(in []byte) ([]byte, error) {
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deal := new(ClientDeal)
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err := cborrpc.ReadCborRPC(bytes.NewReader(in), deal)
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if err != nil {
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return nil, err
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}
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if err := m(deal); err != nil {
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return nil, err
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}
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return cborrpc.Dump(deal)
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}
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}
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func (st *ClientStateStore) ListClient() ([]ClientDeal, error) {
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var out []ClientDeal
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res, err := st.ds.Query(query.Query{})
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if err != nil {
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return nil, err
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}
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defer res.Close()
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for {
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res, ok := res.NextSync()
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if !ok {
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break
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}
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var deal ClientDeal
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err := cborrpc.ReadCborRPC(bytes.NewReader(res.Value), &deal)
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if err != nil {
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return nil, err
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}
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out = append(out, deal)
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}
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return out, nil
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}
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