123 lines
3.5 KiB
Java
123 lines
3.5 KiB
Java
package org.stellar.sdk;
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import org.stellar.sdk.xdr.AccountID;
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import org.stellar.sdk.xdr.Int64;
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import org.stellar.sdk.xdr.OperationType;
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import org.stellar.sdk.xdr.PaymentOp;
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import static com.google.common.base.Preconditions.checkNotNull;
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/**
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* Represents <a href="https://www.stellar.org/developers/learn/concepts/list-of-operations.html#payment" target="_blank">Payment</a> operation.
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* @see <a href="https://www.stellar.org/developers/learn/concepts/list-of-operations.html" target="_blank">List of Operations</a>
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*/
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public class PaymentOperation extends Operation {
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private final KeyPair destination;
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private final Asset asset;
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private final String amount;
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private PaymentOperation(KeyPair destination, Asset asset, String amount) {
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this.destination = checkNotNull(destination, "destination cannot be null");
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this.asset = checkNotNull(asset, "asset cannot be null");
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this.amount = checkNotNull(amount, "amount cannot be null");
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}
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/**
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* Account that receives the payment.
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*/
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public KeyPair getDestination() {
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return destination;
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}
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/**
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* Asset to send to the destination account.
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*/
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public Asset getAsset() {
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return asset;
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}
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/**
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* Amount of the asset to send.
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*/
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public String getAmount() {
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return amount;
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}
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@Override
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org.stellar.sdk.xdr.Operation.OperationBody toOperationBody() {
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PaymentOp op = new PaymentOp();
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// destination
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AccountID destination = new AccountID();
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destination.setAccountID(this.destination.getXdrPublicKey());
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op.setDestination(destination);
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// asset
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op.setAsset(asset.toXdr());
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// amount
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Int64 amount = new Int64();
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amount.setInt64(Operation.toXdrAmount(this.amount));
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op.setAmount(amount);
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org.stellar.sdk.xdr.Operation.OperationBody body = new org.stellar.sdk.xdr.Operation.OperationBody();
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body.setDiscriminant(OperationType.PAYMENT);
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body.setPaymentOp(op);
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return body;
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}
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/**
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* Builds Payment operation.
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* @see PathPaymentOperation
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*/
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public static class Builder {
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private final KeyPair destination;
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private final Asset asset;
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private final String amount;
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private KeyPair mSourceAccount;
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/**
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* Construct a new PaymentOperation builder from a PaymentOp XDR.
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* @param op {@link PaymentOp}
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*/
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Builder(PaymentOp op) {
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destination = KeyPair.fromXdrPublicKey(op.getDestination().getAccountID());
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asset = Asset.fromXdr(op.getAsset());
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amount = Operation.fromXdrAmount(op.getAmount().getInt64().longValue());
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}
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/**
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* Creates a new PaymentOperation builder.
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* @param destination The destination keypair (uses only the public key).
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* @param asset The asset to send.
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* @param amount The amount to send in lumens.
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* @throws ArithmeticException when amount has more than 7 decimal places.
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*/
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public Builder(KeyPair destination, Asset asset, String amount) {
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this.destination = destination;
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this.asset = asset;
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this.amount = amount;
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}
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/**
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* Sets the source account for this operation.
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* @param account The operation's source account.
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* @return Builder object so you can chain methods.
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*/
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public Builder setSourceAccount(KeyPair account) {
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mSourceAccount = account;
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return this;
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}
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/**
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* Builds an operation
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*/
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public PaymentOperation build() {
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PaymentOperation operation = new PaymentOperation(destination, asset, amount);
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if (mSourceAccount != null) {
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operation.setSourceAccount(mSourceAccount);
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}
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return operation;
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}
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}
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}
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