paych

type ConstructorParams struct {
	From addr.Address // Payer
	To   addr.Address // Payee
}

type LaneState struct {
	Redeemed big.Int
	Nonce    uint64
}

type Merge struct {
	Lane  uint64
	Nonce uint64
}

type ModVerifyParams struct {
	// Actor on which to invoke the method.
	Actor addr.Address
	// Method to invoke.
	Method abi.MethodNum
	// Pre-serialized method parameters.
	Data []byte
}

type SignedVoucher struct {
	// ChannelAddr is the address of the payment channel this signed voucher is valid for
	ChannelAddr addr.Address
	// TimeLockMin sets a min epoch before which the voucher cannot be redeemed
	TimeLockMin abi.ChainEpoch
	// TimeLockMax sets a max epoch beyond which the voucher cannot be redeemed
	// TimeLockMax set to 0 means no timeout
	TimeLockMax abi.ChainEpoch
	// (optional) The SecretHash is used by `To` to validate
	SecretHash []byte
	// (optional) Extra can be specified by `From` to add a verification method to the voucher.
	Extra *ModVerifyParams
	// Specifies which lane the Voucher merges into (will be created if does not exist)
	Lane uint64
	// Nonce is set by `From` to prevent redemption of stale vouchers on a lane
	Nonce uint64
	// Amount voucher can be redeemed for
	Amount big.Int
	// (optional) MinSettleHeight can extend channel MinSettleHeight if needed
	MinSettleHeight abi.ChainEpoch

	// (optional) Set of lanes to be merged into `Lane`
	Merges []Merge

	// Sender's signature over the voucher
	Signature *crypto.Signature
}

type State struct {
	// Channel owner, who has funded the actor
	From addr.Address
	// Recipient of payouts from channel
	To addr.Address

	// Amount successfully redeemed through the payment channel, paid out on `Collect()`
	ToSend abi.TokenAmount

	// Height at which the channel can be `Collected`
	SettlingAt abi.ChainEpoch
	// Height before which the channel `ToSend` cannot be collected
	MinSettleHeight abi.ChainEpoch

	// Collections of lane states for the channel, maintained in ID order.
	LaneStates cid.Cid // AMT<LaneState>
}

type StateSummary struct {
	Redeemed abi.TokenAmount
}

type UpdateChannelStateParams struct {
	Sv     SignedVoucher
	Secret []byte
}