func (n *OpenBazaarNode) Purchase(data *PurchaseData) error {
// TODO: validate the purchase data is formatted properly
contract := new(pb.RicardianContract)
order := new(pb.Order)
order.RefundAddress = n.Wallet.GetCurrentAddress(bitcoin.REFUND).EncodeAddress()
order.Shipping.ShipTo = data.shipTo
order.Shipping.Address = data.address
order.Shipping.City = data.city
order.Shipping.State = data.state
order.Shipping.PostalCode = data.postalCode
order.Shipping.Country = pb.CountryCode(pb.CountryCode_value[data.countryCode])
// TODO: Add blockchain ID to order
order.BuyerID.Guid = n.IpfsNode.Identity.Pretty()
pubkey, err := n.IpfsNode.PrivateKey.GetPublic().Bytes()
if err != nil {
return err
}
order.BuyerID.Pubkeys.Guid = pubkey
order.BuyerID.Pubkeys.Bitcoin = n.Wallet.GetMasterPublicKey().Key
order.Timestamp = uint64(time.Now().Unix())
for _, item := range data.items {
i := new(pb.Order_Item)
b, err := ipfs.Cat(n.Context, item.listingHash)
if err != nil {
return err
}
rc := new(pb.RicardianContract)
err = jsonpb.UnmarshalString(string(b), rc)
if err != nil {
return err
}
// TODO: validate signatures on this contract before we purchase it
contract.VendorListings = append(contract.VendorListings, rc.VendorListings[0])
contract.Signatures = append(contract.Signatures, rc.Signatures[0])
ser, err := proto.Marshal(rc.VendorListings[0])
if err != nil {
return err
}
h := sha256.Sum256(ser)
i.ListingHash = h[:]
i.Quantity = uint32(item.quantity)
for _, option := range item.options {
o := new(pb.Order_Item_Option)
o.Name = option.name
o.Value = option.value
i.Options = append(i.Options, o)
}
order.Items = append(order.Items, i)
}
// TODO: create payment obj
// TODO: send to vendor
return nil
}
// Add our identity to the listings and sign it
func (n *OpenBazaarNode) SignListing(listing *pb.Listing) (*pb.RicardianContract, error) {
c := new(pb.RicardianContract)
if err := validate(listing); err != nil {
return c, err
}
id := new(pb.ID)
id.Guid = n.IpfsNode.Identity.Pretty()
pubkey, err := n.IpfsNode.PrivateKey.GetPublic().Bytes()
if err != nil {
return c, err
}
//TODO: add blockchain ID to listing
p := new(pb.ID_Pubkeys)
p.Guid = pubkey
p.Bitcoin = n.Wallet.GetMasterPublicKey().Key
id.Pubkeys = p
listing.VendorID = id
s := new(pb.Signatures)
s.Section = pb.Signatures_LISTING
serializedListing, err := proto.Marshal(listing)
if err != nil {
return c, err
}
guidSig, err := n.IpfsNode.PrivateKey.Sign(serializedListing)
if err != nil {
return c, err
}
priv, _ := ec.PrivKeyFromBytes(ec.S256(), n.Wallet.GetMasterPrivateKey().Key)
hashed := sha256.Sum256(serializedListing)
bitcoinSig, err := priv.Sign(hashed[:])
if err != nil {
return c, err
}
s.Guid = guidSig
s.Bitcoin = bitcoinSig.Serialize()
c.VendorListings = append(c.VendorListings, listing)
c.Signatures = append(c.Signatures, s)
return c, nil
}