problem: users want to verify that response are coming from their nodes

solution: edge node can sign received valued
Co-authored-by: Igor Artamonov <igor@artamonov.ru>

testing/trial/build.gradle

@@ -7,6 +7,7 @@ plugins {
 repositories {
     mavenLocal()
     mavenCentral()
+    maven { url "https://maven.emrld.io" }
 }
 
 dependencies {
@@ -14,12 +15,25 @@ dependencies {
     implementation "org.codehaus.groovy:groovy:3.0.4"
     implementation "com.fasterxml.jackson.core:jackson-core:2.9.8"
     implementation "com.fasterxml.jackson.core:jackson-databind:2.9.8"
+    implementation "io.grpc:grpc-netty:1.46.0"
+    implementation "org.bouncycastle:bcprov-jdk15on:1.61"
+    implementation("io.emeraldpay:emerald-api:0.11.1") {
+        exclude group: 'com.salesforce.servicelibs', module: 'reactor-grpc'
+    }
 
     testImplementation "org.spockframework:spock-core:2.0-M3-groovy-3.0"
 }
 
+configurations.all {
+    resolutionStrategy.dependencySubstitution {
+        substitute module("io.emeraldpay:emerald-api") using project(":api") because "we work with the unreleased development version"
+    }
+}
+
+
 test {
     systemProperty "trialMode", project.getProperty("dshackleTrialMode")
+    systemProperty "signatureKey", project.getProperty("signatureKey")
     useJUnitPlatform()
     testLogging {
         events "PASSED", "FAILED"