4.0.0 org.springframework.boot spring-boot-starter-parent 3.3.4 com.paytm.demo paytm-backend 1.0.0-SNAPSHOT jar paytm-backend Paytm reference backend - Spring Boot 3 + Jakarta + executable JAR 17 UTF-8 org.springframework.boot spring-boot-starter-web org.json json 20240303 io.github.paytm paytmpayments-checksum 2.1.1 paytm-backend ${project.basedir}/src/main/resources ${project.basedir}/../frontend static *.html org.springframework.boot spring-boot-maven-plugin