134 lines
3.7 KiB
Plaintext
134 lines
3.7 KiB
Plaintext
package paych
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import (
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"encoding/base64"
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"fmt"
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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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ipldcbor "github.com/ipfs/go-ipld-cbor"
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paych0 "github.com/filecoin-project/specs-actors/actors/builtin/paych"
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paychtypes "github.com/filecoin-project/go-state-types/builtin/v8/paych"
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{{range .versions}}
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{{if (le . 7)}}
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builtin{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin"
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{{end}}
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{{end}}
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"github.com/filecoin-project/lotus/chain/actors"
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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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if name, av, ok := actors.GetActorMetaByCode(act.Code); ok {
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if name != actors.PaychKey {
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return nil, xerrors.Errorf("actor code is not paych: %s", name)
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}
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switch av {
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{{range .versions}}
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{{if (ge . 8)}}
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case actors.Version{{.}}:
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return load{{.}}(store, act.Head)
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{{end}}
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{{end}}
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}
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}
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switch act.Code {
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{{range .versions}}
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{{if (le . 7)}}
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case builtin{{.}}.PaymentChannelActorCodeID:
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return load{{.}}(store, act.Head)
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{{end}}
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{{end}}
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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, error)
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// Recipient of payouts from channel
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To() (address.Address, error)
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// Height at which the channel can be `Collected`
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SettlingAt() (abi.ChainEpoch, error)
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// Amount successfully redeemed through the payment channel, paid out on `Collect()`
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ToSend() (abi.TokenAmount, error)
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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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GetState() interface{}
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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, error)
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Nonce() (uint64, error)
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}
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// DecodeSignedVoucher decodes base64 encoded signed voucher.
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func DecodeSignedVoucher(s string) (*paychtypes.SignedVoucher, error) {
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data, err := base64.RawURLEncoding.DecodeString(s)
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if err != nil {
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return nil, err
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}
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var sv paychtypes.SignedVoucher
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if err := ipldcbor.DecodeInto(data, &sv); err != nil {
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return nil, err
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}
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return &sv, nil
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}
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func Message(version actors.Version, from address.Address) MessageBuilder {
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switch version {
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{{range .versions}}
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case actors.Version{{.}}:
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return message{{.}}{from}
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{{end}}
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default:
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panic(fmt.Sprintf("unsupported actors version: %d", version))
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}
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}
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type MessageBuilder interface {
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Create(to address.Address, initialAmount abi.TokenAmount) (*types.Message, error)
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Update(paych address.Address, voucher *paychtypes.SignedVoucher, secret []byte) (*types.Message, error)
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Settle(paych address.Address) (*types.Message, error)
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Collect(paych address.Address) (*types.Message, error)
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}
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func toV0SignedVoucher(sv paychtypes.SignedVoucher) paych0.SignedVoucher {
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return paych0.SignedVoucher{
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ChannelAddr: sv.ChannelAddr,
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TimeLockMin: sv.TimeLockMin,
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TimeLockMax: sv.TimeLockMax,
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SecretPreimage: sv.SecretHash,
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Extra: (*paych0.ModVerifyParams)(sv.Extra),
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Lane: sv.Lane,
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Nonce: sv.Nonce,
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Amount: sv.Amount,
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MinSettleHeight: sv.MinSettleHeight,
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Merges: nil,
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Signature: sv.Signature,
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}
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} |