finish up initial api calls

node/impl/full.go

@@ -549,11 +549,46 @@ func (a *FullNodeAPI) PaychVoucherAdd(ctx context.Context, ch address.Address, s
 }
 
 func (a *FullNodeAPI) PaychVoucherCreate(ctx context.Context, pch address.Address, amt types.BigInt, lane uint64) (*types.SignedVoucher, error) {
-	panic("nyi")
+	ci, err := a.PaychMgr.GetChannelInfo(pch)
+	if err != nil {
+		return nil, err
+	}
+
+	nonce, err := a.PaychMgr.NextNonceForLane(ctx, pch, lane)
+	if err != nil {
+		return nil, err
+	}
+
+	// REVIEW ME: The amount passed into this method is the absolute value on
+	// the channel.  I think that a common usecase here might be 'i want to pay
+	// person X an additional 4 FIL'.  If they just pass '4' for the amount,
+	// and the channel already has sent some amount, they wont actually be
+	// sending four additional filecoin.
+	sv := &types.SignedVoucher{
+		Lane:   lane,
+		Nonce:  nonce,
+		Amount: amt,
+	}
+
+	vb, err := sv.SigningBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	sig, err := a.WalletSign(ctx, ci.ControlAddr, vb)
+	if err != nil {
+		return nil, err
+	}
+
+	sv.Signature = sig
+
+	// REVIEWME: Should we immediately add this to the voucher store? or leave that to the caller?
+
+	return sv, nil
 }
 
 func (a *FullNodeAPI) PaychVoucherList(ctx context.Context, pch address.Address) ([]*types.SignedVoucher, error) {
-	panic("nyi")
+	return a.PaychMgr.ListVouchers(ctx, pch)
 }
 
 var _ api.FullNode = &FullNodeAPI{}

paych/paych.go

@@ -189,3 +189,27 @@ func (pm *Manager) AddVoucher(ctx context.Context, ch address.Address, sv *types
 
 	return pm.store.AddVoucher(ch, sv)
 }
+
+func (pm *Manager) ListVouchers(ctx context.Context, ch address.Address) ([]*types.SignedVoucher, error) {
+	// TODO: just having a passthrough method like this feels odd. Seems like
+	// there should be some filtering we're doing here
+	return pm.store.VouchersForPaych(ch)
+}
+
+func (pm *Manager) NextNonceForLane(ctx context.Context, ch address.Address, lane uint64) (uint64, error) {
+	vouchers, err := pm.store.VouchersForPaych(ch)
+	if err != nil {
+		return 0, err
+	}
+
+	var maxnonce uint64
+	for _, v := range vouchers {
+		if v.Lane == lane {
+			if v.Nonce > maxnonce {
+				maxnonce = v.Nonce
+			}
+		}
+	}
+
+	return maxnonce, nil
+}

paych/store.go

@@ -107,9 +107,21 @@ func (ps *Store) ListChannels() ([]address.Address, error) {
 }
 
 func (ps *Store) AddVoucher(ch address.Address, sv *types.SignedVoucher) error {
-	panic("nyi")
+	ci, err := ps.getChannelInfo(ch)
+	if err != nil {
+		return err
 	}
 
-func (ps *Store) VouchersForPaych(addr address.Address) ([]*types.SignedVoucher, error) {
-	panic("nyi")
+	ci.Vouchers = append(ci.Vouchers, sv)
+
+	return ps.putChannelInfo(ci)
+}
+
+func (ps *Store) VouchersForPaych(ch address.Address) ([]*types.SignedVoucher, error) {
+	ci, err := ps.getChannelInfo(ch)
+	if err != nil {
+		return nil, err
+	}
+
+	return ci.Vouchers, nil
 }