Solution/rajat patel

.gitignore

@@ -5,3 +5,16 @@ build/
 .tmp/
 .env
 .env.*
+
+# Gradle
+.gradle/
+!gradle/wrapper/gradle-wrapper.jar
+
+# IDE
+.idea/
+*.iml
+.vscode/
+
+# Local Postgres data (bind-mounted by docker-compose)
+/postgres-data/*
+!/postgres-data/.gitkeep

build.gradle

@@ -0,0 +1,71 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.3.4'
+    id 'io.spring.dependency-management' version '1.1.6'
+    id 'com.diffplug.spotless' version '6.25.0'
+}
+
+group = 'com.rajat'
+version = '0.0.1-SNAPSHOT'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+ext {
+    testcontainersVersion = '1.20.2'
+}
+
+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-validation'
+    implementation 'org.flywaydb:flyway-core'
+    implementation 'org.flywaydb:flyway-database-postgresql'
+    runtimeOnly 'org.postgresql:postgresql'
+
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testImplementation 'org.testcontainers:junit-jupiter'
+    testImplementation 'org.testcontainers:postgresql'
+    testCompileOnly 'org.projectlombok:lombok'
+    testAnnotationProcessor 'org.projectlombok:lombok'
+}
+
+dependencyManagement {
+    imports {
+        mavenBom "org.testcontainers:testcontainers-bom:${testcontainersVersion}"
+    }
+}
+
+spotless {
+    java {
+        googleJavaFormat('1.23.0')
+        removeUnusedImports()
+        trimTrailingWhitespace()
+        endWithNewline()
+    }
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+
+    // Testcontainers / docker-java compatibility with modern Docker daemons.
+    // docker-java defaults to Docker API 1.32, which daemons enforcing a minimum API of 1.40
+    // reject ("client version 1.32 is too old"). docker-java reads the version from the
+    // `api.version` JVM system property, so pin a supported one. Overridable from the environment.
+    systemProperty 'api.version', providers.environmentVariable('DOCKER_API_VERSION').getOrElse('1.44')
+    if (!System.getenv().containsKey('DOCKER_HOST')) {
+        environment 'DOCKER_HOST', 'unix:///var/run/docker.sock'
+    }
+}
+
+// `check` runs spotlessCheck + test; CI uses `./gradlew check`.

docker-compose.yml

@@ -0,0 +1,21 @@
+services:
+  postgres:
+    image: postgres:15.4
+    container_name: wallet-postgres
+    environment:
+      POSTGRES_DB: wallet
+      POSTGRES_USER: wallet
+      POSTGRES_PASSWORD: wallet
+    ports:
+      - "5432:5432"
+    volumes:
+      - wallet_pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U wallet -d wallet"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
+volumes:
+  wallet_pgdata:
+

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists