Example #1
0
// SequenceForAccount implements build.SequenceProvider
func (c *Client) SequenceForAccount(
	accountID string,
) (xdr.SequenceNumber, error) {

	a, err := c.LoadAccount(accountID)
	if err != nil {
		return 0, errors.Wrap(err, "load account failed")
	}

	seq, err := strconv.ParseUint(a.Sequence, 10, 64)
	if err != nil {
		return 0, errors.Wrap(err, "parse sequence failed")
	}

	return xdr.SequenceNumber(seq), nil
}
Example #2
0
// MutateTransaction for Sequence sets the SeqNum on the transaction.
func (m Sequence) MutateTransaction(o *TransactionBuilder) error {
	o.TX.SeqNum = xdr.SequenceNumber(m.Sequence)
	return nil
}
Example #3
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==
}