diff --git a/index.d.ts b/index.d.ts
index aae1cc3c..71eae3d2 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,177 +1,155 @@
-declare module "react-native-adjust" {
-    type Environment = "sandbox" | "production";
-
-    enum LogLevel {
-        Verbose,
-        Debug,
-        Info,
-        Warn,
-        Error,
-        Assert,
-        Suppress
-    }
-
-    interface AdjustAttribution {
-        trackerToken: string;
-        trackerName: string;
-        network: string;
-        campaign: string;
-        adgroup: string;
-        creative: string;
-        clickLabel: string;
-        adid: string;
-    }
-
-    interface AdjustEventTrackingSuccess {
-        message: string;
-        timestamp: string;
-        adid: string;
-        eventToken: string;
-        callbackId: string;
-        jsonResponse: string;
-    }
-
-    interface AdjustEventTrackingFailure {
-        message: string;
-        timestamp: string;
-        adid: string;
-        eventToken: string;
-        callbackId: string;
-        willRetry: boolean;
-        jsonResponse: string;
-    }
-
-    interface AdjustSessionTrackingSuccess {
-        message: string;
-        timestamp: string;
-        adid: string;
-        jsonResponse: string;
-    }
-
-    interface AdjustSessionTrackingFailure {
-        message: string;
-        timestamp: string;
-        adid: string;
-        willRetry: boolean;
-        jsonResponse: string;
-    }
-
-    interface AdjustUri {
-        uri: string;
-    }
-
-    export class AdjustConfig {
-        constructor(appToken: string, environment: Environment) { }
-
-        public setLogLevel(level: LogLevel): void { }
-
-        public setEventBufferingEnabled(isEnabled: boolean): void { }
-
-        public setProcessName(processName: string): void { }
-
-        public setDefaultTracker(defaultTracked: string): void { }
-
-        public setUserAgent(userAgent: string): void { }
-
-        public setAppSecret(secretId: number, info1: number, info2: number, info3: number, info4: number): void { }
-
-        public setDelayStart(delayStart: number): void { }
-
-        public setSendInBackground(sendInBackground: boolean): void { }
-
-        public setDeviceKnown(isDeviceKnown: boolean): void { }
-
-        public setSdkPrefix(sdkPrefix: string): void { }
-
-        public setShouldLaunchDeeplink(shouldLaunchDeeplink: boolean): void { }
-
-        public setAttributionCallbackListener(callback: (attribution: AdjustAttribution) => void): void { }
-
-        public setEventTrackingSucceededCallbackListener(callback: (eventSuccess: AdjustEventTrackingSuccess) => void): void { }
-
-        public setEventTrackingFailedCallbackListener(callback: (eventFailed: AdjustEventTrackingFailure) => void): void { }
-
-        public setSessionTrackingSucceededCallbackListener(callback: (sessionSuccess: AdjustSessionTrackingSuccess) => void): void { }
-
-        public setSessionTrackingFailedCallbackListener(callback: (sessionFailed: AdjustSessionTrackingFailure) => void): void { }
-
-        public setDeferredDeeplinkCallbackListener(callback: (uri: AdjustUri) => void): void { }
-
-        static get LogLevelVerbose(): LogLevel {
-            return LogLevel.Verbose;
-        }
-
-        static get LogLevelDebug(): LogLevel {
-            return LogLevel.Debug;
-        }
-
-        static get LogLevelInfo(): LogLevel {
-            return LogLevel.Info;
-        }
-
-        static get LogLevelWarn(): LogLevel {
-            return LogLevel.Warn;
-        }
-
-        static get LogLevelError(): LogLevel {
-            return LogLevel.Error;
-        }
-
-        static get LogLevelAssert(): LogLevel {
-            return LogLevel.Assert;
-        }
-
-        static get LogLevelSuppress(): LogLevel {
-            return LogLevel.Suppress;
-        }
-
-        static get EnvironmentSandbox(): Environment {
-            return "sandbox";
-        }
-
-        static get EnvironmentProduction(): Environment {
-            return "production";
-        }
-    }
-
-    export class AdjustEvent {
-        constructor(eventToken: string) { }
-
-        public setRevenue(revenue: number, currency: string): void { }
-
-        public addCallbackParameter(key: string, value: string): void { }
-
-        public addPartnerParameter(key: string, value: string): void { }
-
-        public setTransactionId(transactionId: string): void { }
-
-        public setCallbackId(callbackId: string): void { }
-    }
-
-    export const Adjust = {
-        componentWillUnmount: (): void => { },
-        create: (adjustConfig: AdjustConfig): void => { },
-        trackEvent: (adjustEvent: AdjustEvent): void => { },
-        setEnabled: (enabled: boolean): void => { },
-        isEnabled: (callback: (enabled: boolean) => void): void => { },
-        setOfflineMode: (enabled: boolean): void => { },
-        setPushToken: (token: string): void => { },
-        appWillOpenUrl: (url: string): void => { },
-        sendFirstPackages: (): void => { },
-        trackAdRevenue: (source: string, payload: string): void => { },
-        addSessionCallbackParameter: (key: string, value: string): void => { },
-        addSessionPartnerParameter: (key: string, value: string): void => { },
-        removeSessionCallbackParameter: (key: string): void => { },
-        removeSessionPartnerParameter: (key: string): void => { },
-        resetSessionCallbackParameters: (): void => { },
-        resetSessionPartnerParameters: (): void => { },
-        gdprForgetMe: (): void => { },
-        getIdfa: (callback: (idfa: string) => void): void => { },
-        getGoogleAdId: (callback: (adid: string) => void): void => { },
-        getAdid: (callback: (adid: string) => void): void => { },
-        getAttribution: (callback: (attribution: AdjustAttribution) => void): void => { },
-        getAmazonAdId: (callback: (adid: string) => void): void => { },
-        getSdkVersion: (callback: (sdkVersion: string) => void): void => { },
-        setReferrer: (referrer: string): void => { },
-    };
+declare module 'react-native-adjust' {
+  type Environment = 'sandbox' | 'production'
+  type LogLevel = string
+
+  interface AdjustAttribution {
+    trackerToken: string
+    trackerName: string
+    network: string
+    campaign: string
+    adgroup: string
+    creative: string
+    clickLabel: string
+    adid: string
+  }
+
+  interface AdjustEventTrackingSuccess {
+    message: string
+    timestamp: string
+    adid: string
+    eventToken: string
+    callbackId: string
+    jsonResponse: string
+  }
+
+  interface AdjustEventTrackingFailure {
+    message: string
+    timestamp: string
+    adid: string
+    eventToken: string
+    callbackId: string
+    willRetry: boolean
+    jsonResponse: string
+  }
+
+  interface AdjustSessionTrackingSuccess {
+    message: string
+    timestamp: string
+    adid: string
+    jsonResponse: string
+  }
+
+  interface AdjustSessionTrackingFailure {
+    message: string
+    timestamp: string
+    adid: string
+    willRetry: boolean
+    jsonResponse: string
+  }
+
+  interface AdjustUri {
+    uri: string
+  }
+
+  export class AdjustConfig {
+    constructor(appToken: string, environment: Environment)
+
+    public setLogLevel(level: LogLevel): void
+
+    public setEventBufferingEnabled(isEnabled: boolean): void
+
+    public setProcessName(processName: string): void
+
+    public setDefaultTracker(defaultTracked: string): void
+
+    public setUserAgent(userAgent: string): void
+
+    public setAppSecret(
+      secretId: number,
+      info1: number,
+      info2: number,
+      info3: number,
+      info4: number
+    ): void
+
+    public setDelayStart(delayStart: number): void
+
+    public setSendInBackground(sendInBackground: boolean): void
+
+    public setDeviceKnown(isDeviceKnown: boolean): void
+
+    public setSdkPrefix(sdkPrefix: string): void
+
+    public setShouldLaunchDeeplink(shouldLaunchDeeplink: boolean): void
+
+    public setAttributionCallbackListener(
+      callback: (attribution: AdjustAttribution) => void
+    ): void
+
+    public setEventTrackingSucceededCallbackListener(
+      callback: (eventSuccess: AdjustEventTrackingSuccess) => void
+    ): void
+
+    public setEventTrackingFailedCallbackListener(
+      callback: (eventFailed: AdjustEventTrackingFailure) => void
+    ): void
+
+    public setSessionTrackingSucceededCallbackListener(
+      callback: (sessionSuccess: AdjustSessionTrackingSuccess) => void
+    ): void
+
+    public setSessionTrackingFailedCallbackListener(
+      callback: (sessionFailed: AdjustSessionTrackingFailure) => void
+    ): void
+
+    public setDeferredDeeplinkCallbackListener(
+      callback: (uri: AdjustUri) => void
+    ): void
+
+    static LogLevelVerbose: LogLevel
+    static LogLevelDebug: LogLevel
+    static LogLevelInfo: LogLevel
+    static LogLevelWarn: LogLevel
+    static LogLevelError: LogLevel
+    static LogLevelAssert: LogLevel
+    static LogLevelSuppress: LogLevel
+    static EnvironmentSandbox: Environment
+    static EnvironmentProduction: Environment
+  }
+
+  export class AdjustEvent {
+    constructor(eventToken: string)
+    public setRevenue(revenue: number, currency: string): void
+    public addCallbackParameter(key: string, value: string): void
+    public addPartnerParameter(key: string, value: string): void
+    public setTransactionId(transactionId: string): void
+    public setCallbackId(callbackId: string): void
+  }
+
+  export const Adjust: {
+    componentWillUnmount: () => void
+    create: (adjustConfig: AdjustConfig) => void
+    trackEvent: (adjustEvent: AdjustEvent) => void
+    setEnabled: (enabled: boolean) => void
+    isEnabled: (callback: (enabled: boolean) => void) => void
+    setOfflineMode: (enabled: boolean) => void
+    setPushToken: (token: string) => void
+    appWillOpenUrl: (url: string) => void
+    sendFirstPackages: () => void
+    trackAdRevenue: (source: string, payload: string) => void
+    addSessionCallbackParameter: (key: string, value: string) => void
+    addSessionPartnerParameter: (key: string, value: string) => void
+    removeSessionCallbackParameter: (key: string) => void
+    removeSessionPartnerParameter: (key: string) => void
+    resetSessionCallbackParameters: () => void
+    resetSessionPartnerParameters: () => void
+    gdprForgetMe: () => void
+    getIdfa: (callback: (idfa: string) => void) => void
+    getGoogleAdId: (callback: (adid: string) => void) => void
+    getAdid: (callback: (adid: string) => void) => void
+    getAttribution: (callback: (attribution: AdjustAttribution) => void) => void
+    getAmazonAdId: (callback: (adid: string) => void) => void
+    getSdkVersion: (callback: (sdkVersion: string) => void) => void
+    setReferrer: (referrer: string) => void
+  }
 }