lotus/paychmgr/simple.go
Łukasz Magiera f7228f9465 gofmt
2020-04-22 23:09:43 +02:00

142 lines
3.9 KiB
Go

package paychmgr
import (
"bytes"
"context"
"github.com/filecoin-project/specs-actors/actors/builtin"
init_ "github.com/filecoin-project/specs-actors/actors/builtin/init"
"github.com/filecoin-project/specs-actors/actors/builtin/paych"
"github.com/ipfs/go-cid"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/types"
)
func (pm *Manager) createPaych(ctx context.Context, from, to address.Address, amt types.BigInt) (cid.Cid, error) {
params, aerr := actors.SerializeParams(&paych.ConstructorParams{From: from, To: to})
if aerr != nil {
return cid.Undef, aerr
}
enc, aerr := actors.SerializeParams(&init_.ExecParams{
CodeCID: builtin.PaymentChannelActorCodeID,
ConstructorParams: params,
})
if aerr != nil {
return cid.Undef, aerr
}
msg := &types.Message{
To: builtin.InitActorAddr,
From: from,
Value: amt,
Method: builtin.MethodsInit.Exec,
Params: enc,
GasLimit: 1000000,
GasPrice: types.NewInt(0),
}
smsg, err := pm.mpool.MpoolPushMessage(ctx, msg)
if err != nil {
return cid.Undef, xerrors.Errorf("initializing paych actor: %w", err)
}
mcid := smsg.Cid()
go pm.waitForPaychCreateMsg(ctx, mcid)
return mcid, nil
}
// WaitForPaychCreateMsg waits for mcid to appear on chain and returns the robust address of the
// created payment channel
// TODO: wait outside the store lock!
// (tricky because we need to setup channel tracking before we know its address)
func (pm *Manager) waitForPaychCreateMsg(ctx context.Context, mcid cid.Cid) {
defer pm.store.lk.Unlock()
mwait, err := pm.state.StateWaitMsg(ctx, mcid)
if err != nil {
log.Errorf("wait msg: %w", err)
}
if mwait.Receipt.ExitCode != 0 {
log.Errorf("payment channel creation failed (exit code %d)", mwait.Receipt.ExitCode)
}
var decodedReturn init_.ExecReturn
err = decodedReturn.UnmarshalCBOR(bytes.NewReader(mwait.Receipt.Return))
if err != nil {
log.Error(err)
}
paychaddr := decodedReturn.RobustAddress
ci, err := pm.loadOutboundChannelInfo(ctx, paychaddr)
if err != nil {
log.Errorf("loading channel info: %w", err)
}
if err := pm.store.trackChannel(ci); err != nil {
log.Errorf("tracking channel: %w", err)
}
}
func (pm *Manager) addFunds(ctx context.Context, ch address.Address, from address.Address, amt types.BigInt) (cid.Cid, error) {
msg := &types.Message{
To: ch,
From: from,
Value: amt,
Method: 0,
GasLimit: 1000000,
GasPrice: types.NewInt(0),
}
smsg, err := pm.mpool.MpoolPushMessage(ctx, msg)
if err != nil {
return cid.Undef, err
}
mcid := smsg.Cid()
go pm.waitForAddFundsMsg(ctx, mcid)
return mcid, nil
}
// WaitForAddFundsMsg waits for mcid to appear on chain and returns error, if any
// TODO: wait outside the store lock!
// (tricky because we need to setup channel tracking before we know it's address)
func (pm *Manager) waitForAddFundsMsg(ctx context.Context, mcid cid.Cid) {
defer pm.store.lk.Unlock()
mwait, err := pm.state.StateWaitMsg(ctx, mcid)
if err != nil {
log.Error(err)
}
if mwait.Receipt.ExitCode != 0 {
log.Errorf("voucher channel creation failed: adding funds (exit code %d)", mwait.Receipt.ExitCode)
}
}
func (pm *Manager) GetPaych(ctx context.Context, from, to address.Address, ensureFree types.BigInt) (address.Address, cid.Cid, error) {
pm.store.lk.Lock() // unlock only on err; wait funcs will defer unlock
var mcid cid.Cid
ch, err := pm.store.findChan(func(ci *ChannelInfo) bool {
if ci.Direction != DirOutbound {
return false
}
return ci.Control == from && ci.Target == to
})
if err != nil {
pm.store.lk.Unlock()
return address.Undef, cid.Undef, xerrors.Errorf("findChan: %w", err)
}
if ch != address.Undef {
// TODO: Track available funds
mcid, err = pm.addFunds(ctx, ch, from, ensureFree)
} else {
mcid, err = pm.createPaych(ctx, from, to, ensureFree)
}
if err != nil {
pm.store.lk.Unlock()
}
return ch, mcid, err
}