Implement transaction service with Kafka anti-fraud validation

.gitattributes

@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary

.gradle/buildOutputCleanup/cache.properties

@@ -0,0 +1,2 @@
+#Mon Dec 15 01:20:21 PET 2025
+gradle.version=8.14

build.gradle.kts

@@ -0,0 +1,55 @@
+plugins {
+	java
+	id("org.springframework.boot") version "4.0.0"
+	id("io.spring.dependency-management") version "1.1.7"
+}
+
+group = "com.transaction.app"
+version = "0.0.1-SNAPSHOT"
+description = "Yape Code Challenge"
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom(configurations.annotationProcessor.get())
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+var mapstructVersion = "1.5.5.Final"
+var mapstructBindingVersion = "0.2.0"
+
+dependencies {
+    implementation("org.springframework.boot:spring-boot-starter-web")
+	implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+	implementation("org.springframework.boot:spring-boot-starter-kafka")
+    implementation("com.fasterxml.jackson.core:jackson-databind")
+    implementation("com.fasterxml.jackson.core:jackson-core")
+    implementation("com.fasterxml.jackson.core:jackson-annotations")
+
+	implementation("org.springframework.boot:spring-boot-starter-validation")
+    implementation("org.mapstruct:mapstruct:${mapstructVersion}")
+
+    runtimeOnly("org.postgresql:postgresql")
+	compileOnly("org.projectlombok:lombok")
+
+    annotationProcessor("org.mapstruct:mapstruct-processor:${mapstructVersion}")
+	annotationProcessor("org.projectlombok:lombok")
+    annotationProcessor("org.projectlombok:lombok-mapstruct-binding:${mapstructBindingVersion}")
+	testImplementation("org.springframework.boot:spring-boot-starter-data-jpa-test")
+	testImplementation("org.springframework.boot:spring-boot-starter-kafka-test")
+	testImplementation("org.springframework.boot:spring-boot-starter-validation-test")
+	testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+tasks.withType<Test> {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists