Add memo field to Sep10Challenge.newChallenge()

build.gradle

@@ -16,7 +16,7 @@ apply plugin: 'com.github.ben-manes.versions' // gradle dependencyUpdates -Drevi
 apply plugin: 'project-report' // gradle htmlDependencyReport
 
 sourceCompatibility = 1.6
-version = '0.31.0'
+version = '0.32.0'
 group = 'stellar'
 
 jar {

src/main/java/org/stellar/sdk/Sep10Challenge.java

@@ -44,18 +44,19 @@ public static Transaction newChallenge(
  return newChallenge(signer, network, clientAccountId, domainName, webAuthDomain, timebounds, "", "");
  }
 
- /**
- * Returns a valid <a href="https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0010.md#response" target="_blank">SEP 10</a> challenge, for use in web authentication.
- *
- * @param signer The server's signing account.
- * @param network The Stellar network used by the server.
- * @param clientAccountId The stellar account belonging to the client.
- * @param domainName The <a href="https://en.wikipedia.org/wiki/Fully_qualified_domain_name" target="_blank">fully qualified domain name</a> of the service requiring authentication.
- * @param webAuthDomain The fully qualified domain name of the service issuing the challenge.
- * @param timebounds The lifetime of the challenge token.
- * @param clientDomain The domain of the client application requesting authentication.
- * @param clientSigningKey The stellar account listed as the SIGNING_KEY on the client domain's TOML file.
- */
+ /**
+ * Returns a valid <a href="https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0010.md#response" target="_blank">SEP 10</a> challenge, for use in web authentication.
+ *
+ * @param signer The server's signing account.
+ * @param network The Stellar network used by the server.
+ * @param clientAccountId The stellar account belonging to the client.
+ * @param domainName The <a href="https://en.wikipedia.org/wiki/Fully_qualified_domain_name" target="_blank">fully qualified domain name</a> of the service requiring authentication.
+ * @param webAuthDomain The fully qualified domain name of the service issuing the challenge.
+ * @param timebounds The lifetime of the challenge token.
+ * @param clientDomain The domain of the client application requesting authentication.
+ * @param clientSigningKey The stellar account listed as the SIGNING_KEY on the client domain's TOML file.
+ * @param memo The memo of the challenge transaction.
+ */
  public static Transaction newChallenge(
  KeyPair signer,
  Network network,
@@ -64,7 +65,8 @@ public static Transaction newChallenge(
  String webAuthDomain,
  TimeBounds timebounds,
  String clientDomain,
- String clientSigningKey
+ String clientSigningKey,
+ Memo memo
  ) throws InvalidSep10ChallengeException {
  byte[] nonce = new byte[48];
  SecureRandom random = new SecureRandom();
@@ -94,6 +96,10 @@ public static Transaction newChallenge(
  .addOperation(domainNameOperation)
  .addOperation(webAuthDomainOperation);
 
+ if (memo != null) {
+ builder.addMemo(memo);
+ }
+
  if (!clientSigningKey.isEmpty()) {
  if (StrKey.decodeVersionByte(clientSigningKey) != StrKey.VersionByte.ACCOUNT_ID) {
  throw new InvalidSep10ChallengeException(clientSigningKey + " is not a valid account id");
@@ -109,6 +115,32 @@ public static Transaction newChallenge(
  return transaction;
  }
 
+
+ /**
+ * Returns a valid <a href="https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0010.md#response" target="_blank">SEP 10</a> challenge, for use in web authentication.
+ *
+ * @param signer The server's signing account.
+ * @param network The Stellar network used by the server.
+ * @param clientAccountId The stellar account belonging to the client.
+ * @param domainName The <a href="https://en.wikipedia.org/wiki/Fully_qualified_domain_name" target="_blank">fully qualified domain name</a> of the service requiring authentication.
+ * @param webAuthDomain The fully qualified domain name of the service issuing the challenge.
+ * @param timebounds The lifetime of the challenge token.
+ * @param clientDomain The domain of the client application requesting authentication.
+ * @param clientSigningKey The stellar account listed as the SIGNING_KEY on the client domain's TOML file.
+ */
+ public static Transaction newChallenge(
+ KeyPair signer,
+ Network network,
+ String clientAccountId,
+ String domainName,
+ String webAuthDomain,
+ TimeBounds timebounds,
+ String clientDomain,
+ String clientSigningKey
+ ) throws InvalidSep10ChallengeException {
+ return newChallenge(signer, network, clientAccountId, domainName, webAuthDomain, timebounds, clientDomain, clientSigningKey, null);
+ }
+
  /**
  * Reads a SEP 10 challenge transaction and returns the decoded transaction envelope and client account ID contained within.
  * <p>