05c11531b1
build abstraction for paych actor and switch to using it in payment channel manager and state predicates
57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
package paych
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import (
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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/go-state-types/abi"
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big "github.com/filecoin-project/go-state-types/big"
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"github.com/filecoin-project/go-state-types/cbor"
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v0builtin "github.com/filecoin-project/specs-actors/actors/builtin"
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"github.com/filecoin-project/lotus/chain/actors/adt"
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"github.com/filecoin-project/lotus/chain/types"
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)
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// Load returns an abstract copy of payment channel state, irregardless of actor version
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func Load(store adt.Store, act *types.Actor) (State, error) {
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switch act.Code {
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case v0builtin.PaymentChannelActorCodeID:
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out := v0State{store: store}
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err := store.Get(store.Context(), act.Head, &out)
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if err != nil {
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return nil, err
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}
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return &out, nil
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}
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return nil, xerrors.Errorf("unknown actor code %s", act.Code)
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}
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// State is an abstract version of payment channel state that works across
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// versions
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type State interface {
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cbor.Marshaler
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// Channel owner, who has funded the actor
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From() address.Address
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// Recipient of payouts from channel
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To() address.Address
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// Height at which the channel can be `Collected`
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SettlingAt() abi.ChainEpoch
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// Amount successfully redeemed through the payment channel, paid out on `Collect()`
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ToSend() abi.TokenAmount
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// Get total number of lanes
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LaneCount() (uint64, error)
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// Iterate lane states
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ForEachLaneState(cb func(idx uint64, dl LaneState) error) error
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}
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// LaneState is an abstract copy of the state of a single lane
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type LaneState interface {
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Redeemed() big.Int
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Nonce() uint64
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}
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