Add SEP-45 implementation

api-schema/src/main/java/org/stellar/anchor/api/sep/sep45/ChallengeRequest.java

@@ -0,0 +1,17 @@
+package org.stellar.anchor.api.sep.sep45;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Data;
+
+@Builder
+@Data
+public class ChallengeRequest {
+  private String account;
+
+  @JsonProperty("home_domain")
+  private String homeDomain;
+
+  @JsonProperty("client_domain")
+  private String clientDomain;
+}

api-schema/src/main/java/org/stellar/anchor/api/sep/sep45/ChallengeResponse.java

@@ -0,0 +1,15 @@
+package org.stellar.anchor.api.sep.sep45;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Data;
+
+@Builder
+@Data
+public class ChallengeResponse {
+  @JsonProperty("authorization_entries")
+  private String authorizationEntries;
+
+  @JsonProperty("network_passphrase")
+  private String networkPassphrase;
+}

api-schema/src/main/java/org/stellar/anchor/api/sep/sep45/ValidationRequest.java

@@ -0,0 +1,12 @@
+package org.stellar.anchor.api.sep.sep45;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Data;
+
+@Builder
+@Data
+public class ValidationRequest {
+  @JsonProperty("authorization_entries")
+  private String authorizationEntries;
+}

api-schema/src/main/java/org/stellar/anchor/api/sep/sep45/ValidationResponse.java

@@ -0,0 +1,10 @@
+package org.stellar.anchor.api.sep.sep45;
+
+import lombok.Builder;
+import lombok.Data;
+
+@Builder
+@Data
+public class ValidationResponse {
+  private String token;
+}

core/src/main/java/org/stellar/anchor/config/AppConfig.java

@@ -10,5 +10,7 @@ public interface AppConfig {
 
   String getHorizonUrl();
 
+  String getRpcUrl();
+
   List<String> getLanguages();
 }

core/src/main/java/org/stellar/anchor/config/SecretConfig.java

@@ -6,8 +6,13 @@ public interface SecretConfig {
   @Deprecated // TODO: ANCHOR-667
   String getSep10JwtSecretKey();
 
+  @Deprecated // TODO: ANCHOR-667
+  String getSep45JwtSecretKey();
+
   String getSep10SigningSeed();
 
+  String getSep45SimulatingSigningSeed();
+
   String getSep24InteractiveUrlJwtSecret();
 
   String getSep24MoreInfoUrlJwtSecret();

core/src/main/java/org/stellar/anchor/config/Sep45Config.java

@@ -0,0 +1,14 @@
+package org.stellar.anchor.config;
+
+import java.util.List;
+
+public interface Sep45Config {
+
+  Boolean getEnabled();
+
+  String getWebAuthDomain();
+
+  String getWebAuthContractId();
+
+  List<String> getHomeDomains();
+}

core/src/main/java/org/stellar/anchor/horizon/Horizon.java → core/src/main/java/org/stellar/anchor/network/Horizon.java

@@ -1,4 +1,4 @@
-package org.stellar.anchor.horizon;
+package org.stellar.anchor.network;
 
 import static org.stellar.anchor.api.asset.AssetInfo.NATIVE_ASSET_CODE;
 

core/src/main/java/org/stellar/anchor/network/Rpc.java

@@ -0,0 +1,30 @@
+package org.stellar.anchor.network;
+
+import lombok.Getter;
+import org.stellar.anchor.config.AppConfig;
+import org.stellar.sdk.SorobanServer;
+import org.stellar.sdk.Transaction;
+import org.stellar.sdk.TransactionBuilderAccount;
+import org.stellar.sdk.responses.sorobanrpc.GetLatestLedgerResponse;
+import org.stellar.sdk.responses.sorobanrpc.SimulateTransactionResponse;
+
+@Getter
+public class Rpc {
+  private final SorobanServer rpc;
+
+  public Rpc(AppConfig appConfig) {
+    this.rpc = new SorobanServer(appConfig.getRpcUrl());
+  }
+
+  public TransactionBuilderAccount getAccount(String accountId) {
+    return rpc.getAccount(accountId);
+  }
+
+  public SimulateTransactionResponse simulateTransaction(Transaction transaction) {
+    return rpc.simulateTransaction(transaction);
+  }
+
+  public GetLatestLedgerResponse getLatestLedger() {
+    return rpc.getLatestLedger();
+  }
+}

core/src/main/java/org/stellar/anchor/sep10/Sep10Service.java

@@ -31,7 +31,7 @@
 import org.stellar.anchor.config.AppConfig;
 import org.stellar.anchor.config.SecretConfig;
 import org.stellar.anchor.config.Sep10Config;
-import org.stellar.anchor.horizon.Horizon;
+import org.stellar.anchor.network.Horizon;
 import org.stellar.anchor.util.Log;
 import org.stellar.sdk.*;
 import org.stellar.sdk.Sep10Challenge.ChallengeTransaction;

core/src/main/java/org/stellar/anchor/sep45/ISep45Service.java

@@ -0,0 +1,14 @@
+package org.stellar.anchor.sep45;
+
+import org.stellar.anchor.api.exception.AnchorException;
+import org.stellar.anchor.api.sep.sep45.ChallengeRequest;
+import org.stellar.anchor.api.sep.sep45.ChallengeResponse;
+import org.stellar.anchor.api.sep.sep45.ValidationRequest;
+import org.stellar.anchor.api.sep.sep45.ValidationResponse;
+
+public interface ISep45Service {
+
+  ChallengeResponse getChallenge(ChallengeRequest request) throws AnchorException;
+
+  ValidationResponse validate(ValidationRequest request) throws AnchorException;
+}