lotus/chain/actors/builtin/paych/state.go
2021-04-27 02:02:44 -04:00

101 lines
3.2 KiB
Go

package paych
import (
"encoding/base64"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/abi"
big "github.com/filecoin-project/go-state-types/big"
"github.com/filecoin-project/go-state-types/cbor"
"github.com/ipfs/go-cid"
ipldcbor "github.com/ipfs/go-ipld-cbor"
builtin0 "github.com/filecoin-project/specs-actors/actors/builtin"
paych0 "github.com/filecoin-project/specs-actors/actors/builtin/paych"
builtin2 "github.com/filecoin-project/specs-actors/v2/actors/builtin"
builtin3 "github.com/filecoin-project/specs-actors/v3/actors/builtin"
builtin4 "github.com/filecoin-project/specs-actors/v4/actors/builtin"
"github.com/filecoin-project/lotus/chain/actors/adt"
"github.com/filecoin-project/lotus/chain/actors/builtin"
"github.com/filecoin-project/lotus/chain/types"
)
func init() {
builtin.RegisterActorState(builtin0.PaymentChannelActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
return load0(store, root)
})
builtin.RegisterActorState(builtin2.PaymentChannelActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
return load2(store, root)
})
builtin.RegisterActorState(builtin3.PaymentChannelActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
return load3(store, root)
})
builtin.RegisterActorState(builtin4.PaymentChannelActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
return load4(store, root)
})
}
// Load returns an abstract copy of payment channel state, irregardless of actor version
func Load(store adt.Store, act *types.Actor) (State, error) {
switch act.Code {
case builtin0.PaymentChannelActorCodeID:
return load0(store, act.Head)
case builtin2.PaymentChannelActorCodeID:
return load2(store, act.Head)
case builtin3.PaymentChannelActorCodeID:
return load3(store, act.Head)
case builtin4.PaymentChannelActorCodeID:
return load4(store, act.Head)
}
return nil, xerrors.Errorf("unknown actor code %s", act.Code)
}
// State is an abstract version of payment channel state that works across
// versions
type State interface {
cbor.Marshaler
// Channel owner, who has funded the actor
From() (address.Address, error)
// Recipient of payouts from channel
To() (address.Address, error)
// Height at which the channel can be `Collected`
SettlingAt() (abi.ChainEpoch, error)
// Amount successfully redeemed through the payment channel, paid out on `Collect()`
ToSend() (abi.TokenAmount, error)
// Get total number of lanes
LaneCount() (uint64, error)
// Iterate lane states
ForEachLaneState(cb func(idx uint64, dl LaneState) error) error
}
// LaneState is an abstract copy of the state of a single lane
type LaneState interface {
Redeemed() (big.Int, error)
Nonce() (uint64, error)
}
type SignedVoucher = paych0.SignedVoucher
type ModVerifyParams = paych0.ModVerifyParams
// DecodeSignedVoucher decodes base64 encoded signed voucher.
func DecodeSignedVoucher(s string) (*SignedVoucher, error) {
data, err := base64.RawURLEncoding.DecodeString(s)
if err != nil {
return nil, err
}
var sv SignedVoucher
if err := ipldcbor.DecodeInto(data, &sv); err != nil {
return nil, err
}
return &sv, nil
}