121 lines
3.1 KiB
Go
121 lines
3.1 KiB
Go
package paych
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import (
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"context"
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"fmt"
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"github.com/ipfs/go-cid"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/lotus/chain/actors"
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"github.com/filecoin-project/lotus/chain/types"
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)
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func (pm *Manager) createPaych(ctx context.Context, from, to address.Address, amt types.BigInt) (address.Address, cid.Cid, error) {
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params, aerr := actors.SerializeParams(&actors.PCAConstructorParams{To: to})
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if aerr != nil {
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return address.Undef, cid.Undef, aerr
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}
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enc, aerr := actors.SerializeParams(&actors.ExecParams{
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Params: params,
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Code: actors.PaymentChannelCodeCid,
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})
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if aerr != nil {
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return address.Undef, cid.Undef, aerr
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}
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msg := &types.Message{
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To: actors.InitAddress,
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From: from,
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Value: amt,
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Method: actors.IAMethods.Exec,
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Params: enc,
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GasLimit: types.NewInt(1000000),
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GasPrice: types.NewInt(0),
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}
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smsg, err := pm.mpool.MpoolPushMessage(ctx, msg)
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if err != nil {
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return address.Undef, cid.Undef, xerrors.Errorf("initializing paych actor: %w", err)
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}
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mcid := smsg.Cid()
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// TODO: wait outside the store lock!
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// (tricky because we need to setup channel tracking before we know it's address)
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mwait, err := pm.state.StateWaitMsg(ctx, mcid)
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if err != nil {
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return address.Undef, cid.Undef, xerrors.Errorf("wait msg: %w", err)
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}
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if mwait.Receipt.ExitCode != 0 {
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return address.Undef, cid.Undef, fmt.Errorf("payment channel creation failed (exit code %d)", mwait.Receipt.ExitCode)
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}
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paychaddr, err := address.NewFromBytes(mwait.Receipt.Return)
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if err != nil {
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return address.Undef, cid.Undef, err
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}
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ci, err := pm.loadOutboundChannelInfo(ctx, paychaddr)
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if err != nil {
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return address.Undef, cid.Undef, xerrors.Errorf("loading channel info: %w", err)
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}
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if err := pm.store.trackChannel(ci); err != nil {
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return address.Undef, cid.Undef, xerrors.Errorf("tracking channel: %w", err)
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}
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return paychaddr, mcid, nil
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}
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func (pm *Manager) addFunds(ctx context.Context, ch address.Address, from address.Address, amt types.BigInt) error {
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msg := &types.Message{
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To: ch,
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From: from,
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Value: amt,
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Method: 0,
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GasLimit: types.NewInt(1000000),
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GasPrice: types.NewInt(0),
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}
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smsg, err := pm.mpool.MpoolPushMessage(ctx, msg)
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if err != nil {
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return err
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}
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mwait, err := pm.state.StateWaitMsg(ctx, smsg.Cid()) // TODO: wait outside the store lock!
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if err != nil {
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return err
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}
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if mwait.Receipt.ExitCode != 0 {
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return fmt.Errorf("voucher channel creation failed: adding funds (exit code %d)", mwait.Receipt.ExitCode)
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}
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return nil
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}
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func (pm *Manager) GetPaych(ctx context.Context, from, to address.Address, ensureFree types.BigInt) (address.Address, cid.Cid, error) {
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pm.store.lk.Lock()
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defer pm.store.lk.Unlock()
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ch, err := pm.store.findChan(func(ci *ChannelInfo) bool {
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if ci.Direction != DirOutbound {
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return false
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}
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return ci.Control == from && ci.Target == to
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})
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if err != nil {
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return address.Undef, cid.Undef, xerrors.Errorf("findChan: %w", err)
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}
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if ch != address.Undef {
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// TODO: Track available funds
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return ch, cid.Undef, pm.addFunds(ctx, ch, from, ensureFree)
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}
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return pm.createPaych(ctx, from, to, ensureFree)
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}
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