Beispiel #1
0
// ToXdrObject creates xdr.Asset object from build.Asset object
func (a Asset) ToXdrObject() (xdr.Asset, error) {
	if a.Native {
		return xdr.NewAsset(xdr.AssetTypeAssetTypeNative, nil)
	}

	var issuer xdr.AccountId
	err := setAccountId(a.Issuer, &issuer)
	if err != nil {
		return xdr.Asset{}, err
	}

	length := len(a.Code)
	switch {
	case length >= 1 && length <= 4:
		var codeArray [4]byte
		byteArray := []byte(a.Code)
		copy(codeArray[:], byteArray[0:length])
		asset := xdr.AssetAlphaNum4{codeArray, issuer}
		return xdr.NewAsset(xdr.AssetTypeAssetTypeCreditAlphanum4, asset)
	case length >= 5 && length <= 12:
		var codeArray [12]byte
		byteArray := []byte(a.Code)
		copy(codeArray[:], byteArray[0:length])
		asset := xdr.AssetAlphaNum12{codeArray, issuer}
		return xdr.NewAsset(xdr.AssetTypeAssetTypeCreditAlphanum12, asset)
	default:
		return xdr.Asset{}, errors.New("Asset code length is invalid")
	}
}
Beispiel #2
0
func createAlphaNumAsset(code, issuerAccountId string) (xdr.Asset, error) {
	var issuer xdr.AccountId
	err := setAccountId(issuerAccountId, &issuer)
	if err != nil {
		return xdr.Asset{}, err
	}

	length := len(code)
	switch {
	case length >= 1 && length <= 4:
		var codeArray [4]byte
		byteArray := []byte(code)
		copy(codeArray[:], byteArray[0:length])
		asset := xdr.AssetAlphaNum4{codeArray, issuer}
		return xdr.NewAsset(xdr.AssetTypeAssetTypeCreditAlphanum4, asset)
	case length >= 5 && length <= 12:
		var codeArray [12]byte
		byteArray := []byte(code)
		copy(codeArray[:], byteArray[0:length])
		asset := xdr.AssetAlphaNum12{codeArray, issuer}
		return xdr.NewAsset(xdr.AssetTypeAssetTypeCreditAlphanum12, asset)
	default:
		return xdr.Asset{}, errors.New("Asset code length is invalid")
	}
}
Beispiel #3
0
// MutatePayment for NativeAmount sets the PaymentOp's currency field to
// native and sets its amount to the provided integer
func (m NativeAmount) MutatePayment(o interface{}) (err error) {
	switch o := o.(type) {
	default:
		err = errors.New("Unexpected operation type")
	case *xdr.PaymentOp:
		o.Amount, err = amount.Parse(m.Amount)
		if err != nil {
			return
		}

		o.Asset, err = xdr.NewAsset(xdr.AssetTypeAssetTypeNative, nil)
	case *xdr.PathPaymentOp:
		o.DestAmount, err = amount.Parse(m.Amount)
		if err != nil {
			return
		}

		o.DestAsset, err = xdr.NewAsset(xdr.AssetTypeAssetTypeNative, nil)
	}
	return
}
Beispiel #4
0
// ExampleLowLevelTransaction creates and signs a simple transaction, and then
// encodes it into a hex string capable of being submitted to stellar-core.
//
// It uses the low-level xdr facilities to create the transaction.
func ExampleLowLevelTransaction() {
	skp := keypair.MustParse("SA26PHIKZM6CXDGR472SSGUQQRYXM6S437ZNHZGRM6QA4FOPLLLFRGDX")
	dkp := keypair.MustParse("SBQHO2IMYKXAYJFCWGXC7YKLJD2EGDPSK3IUDHVJ6OOTTKLSCK6Z6POM")

	asset, err := xdr.NewAsset(xdr.AssetTypeAssetTypeNative, nil)
	if err != nil {
		panic(err)
	}

	var destination xdr.AccountId
	err = destination.SetAddress(dkp.Address())
	if err != nil {
		panic(err)
	}

	op := xdr.PaymentOp{
		Destination: destination,
		Asset:       asset,
		Amount:      50 * 10000000,
	}

	memo, err := xdr.NewMemo(xdr.MemoTypeMemoNone, nil)

	var source xdr.AccountId
	err = source.SetAddress(skp.Address())
	if err != nil {
		panic(err)
	}

	body, err := xdr.NewOperationBody(xdr.OperationTypePayment, op)
	if err != nil {
		panic(err)
	}

	tx := xdr.Transaction{
		SourceAccount: source,
		Fee:           10,
		SeqNum:        xdr.SequenceNumber(1),
		Memo:          memo,
		Operations: []xdr.Operation{
			{Body: body},
		},
	}

	var txBytes bytes.Buffer
	_, err = xdr.Marshal(&txBytes, tx)
	if err != nil {
		panic(err)
	}

	txHash := hash.Hash(txBytes.Bytes())
	signature, err := skp.Sign(txHash[:])
	if err != nil {
		panic(err)
	}

	ds := xdr.DecoratedSignature{
		Hint:      skp.Hint(),
		Signature: xdr.Signature(signature[:]),
	}

	txe := xdr.TransactionEnvelope{
		Tx:         tx,
		Signatures: []xdr.DecoratedSignature{ds},
	}

	var txeBytes bytes.Buffer
	_, err = xdr.Marshal(&txeBytes, txe)
	if err != nil {
		panic(err)
	}
	txeB64 := base64.StdEncoding.EncodeToString(txeBytes.Bytes())

	fmt.Printf("tx base64: %s", txeB64)
	// Output: tx base64: AAAAAAU08yUQ8sHqhY8j9mXWwERfHC/3cKFSe/spAr0rGtO2AAAACgAAAAAAAAABAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAA+fnTe7/v4whpBUx96oj92jfZPz7S00l3O2xeyeqWIA0AAAAAAAAAAB3NZQAAAAAAAAAAASsa07YAAABAieruUIGcQH6RlQ+prYflPFU3nED2NvWhtaC+tgnKsqgiKURK4xo/W7EgH0+I6aQok52awbE+ksOxEQ5MLJ9eAw==
}