diff --git a/packages/near-contract-standards/lib/fungible_token/events.d.ts b/packages/near-contract-standards/lib/fungible_token/events.d.ts
index 840b2aad0..b3c3377db 100644
--- a/packages/near-contract-standards/lib/fungible_token/events.d.ts
+++ b/packages/near-contract-standards/lib/fungible_token/events.d.ts
@@ -19,8 +19,10 @@ import { Option } from "../non_fungible_token/utils";
 import { AccountId, Balance } from "near-sdk-js";
 export declare type Nep141EventKind = FtMint[] | FtTransfer[] | FtBurn[];
 export declare class Nep141Event extends NearEvent {
+    standard: string;
     version: string;
-    event_kind: Nep141EventKind;
+    event: string;
+    data: Nep141EventKind;
     constructor(version: string, event_kind: Nep141EventKind);
 }
 /** Data to log for an FT mint event. To log this event, call [`.emit()`](FtMint::emit). */
diff --git a/packages/near-contract-standards/lib/fungible_token/events.js b/packages/near-contract-standards/lib/fungible_token/events.js
index 512f72c95..1fd1599bd 100644
--- a/packages/near-contract-standards/lib/fungible_token/events.js
+++ b/packages/near-contract-standards/lib/fungible_token/events.js
@@ -15,11 +15,14 @@
  * or [`FtBurn::emit_many`] respectively.
  */
 import { NearEvent } from "../event";
+import { toSnakeCase } from "../util";
 export class Nep141Event extends NearEvent {
     constructor(version, event_kind) {
         super();
+        this.standard = "nep141";
         this.version = version;
-        this.event_kind = event_kind;
+        this.event = toSnakeCase(event_kind[0].constructor.name);
+        this.data = event_kind;
     }
 }
 /** Data to log for an FT mint event. To log this event, call [`.emit()`](FtMint::emit). */
diff --git a/packages/near-contract-standards/lib/non_fungible_token/events.d.ts b/packages/near-contract-standards/lib/non_fungible_token/events.d.ts
index 59f8b49e2..a93af09ec 100644
--- a/packages/near-contract-standards/lib/non_fungible_token/events.d.ts
+++ b/packages/near-contract-standards/lib/non_fungible_token/events.d.ts
@@ -16,10 +16,12 @@
 import { AccountId } from "near-sdk-js";
 import { NearEvent } from "../event";
 import { TokenId } from "./token";
-export declare type Nep171EventKind = NftMint[] | NftTransfer[] | NftBurn[];
+export declare type Nep171EventKind = NftMint[] | NftTransfer[] | NftBurn[] | NftContractMetadataUpdate[];
 export declare class Nep171Event extends NearEvent {
+    standard: string;
     version: string;
-    event_kind: Nep171EventKind;
+    event: string;
+    data: Nep171EventKind;
     constructor(version: string, event_kind: Nep171EventKind);
 }
 /** Data to log for an NFT mint event. To log this event, call `.emit()` */
@@ -65,3 +67,14 @@ export declare class NftBurn {
      * where each [`NftBurn`] represents the data of each burn. */
     static emit_many(data: NftBurn[]): void;
 }
+/** Data to log for an NFT contract metadata updates. To log this event, call [`.emit()`](NftContractMetadataUpdate.emit). */
+export declare class NftContractMetadataUpdate {
+    memo?: string;
+    constructor(memo?: string);
+    /** Logs the event to the host. This is required to ensure that the event is triggered
+     * and to consume the event. */
+    emit(): void;
+    /** Emits an contract metadata update event, through `near.log`,
+     * where each [`NftBurn`] represents the data of each burn. */
+    static emit_many(data: NftContractMetadataUpdate[]): void;
+}
diff --git a/packages/near-contract-standards/lib/non_fungible_token/events.js b/packages/near-contract-standards/lib/non_fungible_token/events.js
index 69622fd56..36142bdcb 100644
--- a/packages/near-contract-standards/lib/non_fungible_token/events.js
+++ b/packages/near-contract-standards/lib/non_fungible_token/events.js
@@ -1,9 +1,12 @@
 import { NearEvent } from "../event";
+import { toSnakeCase } from "../util";
 export class Nep171Event extends NearEvent {
     constructor(version, event_kind) {
         super();
+        this.standard = "nep171";
         this.version = version;
-        this.event_kind = event_kind;
+        this.event = toSnakeCase(event_kind[0].constructor.name);
+        this.data = event_kind;
     }
 }
 /** Data to log for an NFT mint event. To log this event, call `.emit()` */
@@ -64,6 +67,22 @@ export class NftBurn {
         new_171_v1(data).emit();
     }
 }
+/** Data to log for an NFT contract metadata updates. To log this event, call [`.emit()`](NftContractMetadataUpdate.emit). */
+export class NftContractMetadataUpdate {
+    constructor(memo) {
+        this.memo = memo;
+    }
+    /** Logs the event to the host. This is required to ensure that the event is triggered
+     * and to consume the event. */
+    emit() {
+        NftContractMetadataUpdate.emit_many([this]);
+    }
+    /** Emits an contract metadata update event, through `near.log`,
+     * where each [`NftBurn`] represents the data of each burn. */
+    static emit_many(data) {
+        new_171_v1(data).emit();
+    }
+}
 function new_171(version, event_kind) {
     return new Nep171Event(version, event_kind);
 }
diff --git a/packages/near-contract-standards/lib/util.d.ts b/packages/near-contract-standards/lib/util.d.ts
new file mode 100644
index 000000000..44a75fe1d
--- /dev/null
+++ b/packages/near-contract-standards/lib/util.d.ts
@@ -0,0 +1 @@
+export declare const toSnakeCase: (str: string) => string;
diff --git a/packages/near-contract-standards/lib/util.js b/packages/near-contract-standards/lib/util.js
new file mode 100644
index 000000000..4f8afc021
--- /dev/null
+++ b/packages/near-contract-standards/lib/util.js
@@ -0,0 +1,3 @@
+export const toSnakeCase = (str) => {
+    return str.replace(/[A-Z]/g, (letter, index) => { return index == 0 ? letter.toLowerCase() : '_' + letter.toLowerCase(); });
+};
diff --git a/packages/near-contract-standards/src/fungible_token/events.ts b/packages/near-contract-standards/src/fungible_token/events.ts
index 96a613c07..862d0ecbf 100644
--- a/packages/near-contract-standards/src/fungible_token/events.ts
+++ b/packages/near-contract-standards/src/fungible_token/events.ts
@@ -18,19 +18,24 @@
 import { NearEvent } from "../event";
 import { Option } from "../non_fungible_token/utils";
 import { AccountId, Balance } from "near-sdk-js";
+import { toSnakeCase } from "../util";
 
 export type Nep141EventKind = FtMint[] | FtTransfer[] | FtBurn[];
 
 export class Nep141Event extends NearEvent {
-    version: string;
-    event_kind: Nep141EventKind;
-
-    constructor(version: string, event_kind: Nep141EventKind) {
-      super();
-      this.version = version;
-      this.event_kind = event_kind;
-    }
+  standard: string;
+  version: string;
+  event: string;
+  data: Nep141EventKind;
+
+  constructor(version: string, event_kind: Nep141EventKind) {
+    super();
+    this.standard = "nep141"
+    this.version = version
+    this.event = toSnakeCase(event_kind[0].constructor.name)
+    this.data = event_kind
   }
+}
 
 /** Data to log for an FT mint event. To log this event, call [`.emit()`](FtMint::emit). */
 export class FtMint {
diff --git a/packages/near-contract-standards/src/non_fungible_token/events.ts b/packages/near-contract-standards/src/non_fungible_token/events.ts
index f8d5e8109..2d0863f39 100644
--- a/packages/near-contract-standards/src/non_fungible_token/events.ts
+++ b/packages/near-contract-standards/src/non_fungible_token/events.ts
@@ -16,17 +16,22 @@
 import { AccountId } from "near-sdk-js";
 import { NearEvent } from "../event";
 import { TokenId } from "./token";
+import { toSnakeCase } from "../util";
 
-export type Nep171EventKind = NftMint[] | NftTransfer[] | NftBurn[];
+export type Nep171EventKind = NftMint[] | NftTransfer[] | NftBurn[] | NftContractMetadataUpdate[];
 
 export class Nep171Event extends NearEvent {
+  standard: string;
   version: string;
-  event_kind: Nep171EventKind;
+  event: string;
+  data: Nep171EventKind;
 
   constructor(version: string, event_kind: Nep171EventKind) {
     super();
-    this.version = version;
-    this.event_kind = event_kind;
+    this.standard = "nep171"
+    this.version = version
+    this.event = toSnakeCase(event_kind[0].constructor.name)
+    this.data = event_kind
   }
 }
 
@@ -97,6 +102,25 @@ export class NftBurn {
   }
 }
 
+/** Data to log for an NFT contract metadata updates. To log this event, call [`.emit()`](NftContractMetadataUpdate.emit). */
+export class NftContractMetadataUpdate {
+  constructor(
+      public memo?: string
+  ) {}
+
+  /** Logs the event to the host. This is required to ensure that the event is triggered
+   * and to consume the event. */
+  emit() {
+    NftContractMetadataUpdate.emit_many([this]);
+  }
+
+  /** Emits an contract metadata update event, through `near.log`,
+   * where each [`NftBurn`] represents the data of each burn. */
+  static emit_many(data: NftContractMetadataUpdate[]) {
+    new_171_v1(data).emit();
+  }
+}
+
 function new_171(version: string, event_kind: Nep171EventKind): NearEvent {
   return new Nep171Event(version, event_kind);
 }
diff --git a/packages/near-contract-standards/src/util.ts b/packages/near-contract-standards/src/util.ts
new file mode 100644
index 000000000..6878f2d95
--- /dev/null
+++ b/packages/near-contract-standards/src/util.ts
@@ -0,0 +1,3 @@
+export const toSnakeCase = (str: string) => {
+  return str.replace(/[A-Z]/g, (letter, index) => { return index == 0 ? letter.toLowerCase() : '_'+ letter.toLowerCase();});
+}
\ No newline at end of file