1 files changed, 23 insertions, 0 deletions
diff --git a/packages/utils/src/abi_encoder/evm_data_types/tuple.ts b/packages/utils/src/abi_encoder/evm_data_types/tuple.ts
new file mode 100644
index 000000000..0db29c1eb
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/tuple.ts
@@ -0,0 +1,23 @@
+import { DataItem } from 'ethereum-types';
+
+import { DataTypeFactory, MemberDataType } from '../data_type';
+
+export class Tuple extends MemberDataType {
+    private readonly _tupleSignature: string;
+
+    public static matchType(type: string): boolean {
+        return type === 'tuple';
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory);
+        if (!Tuple.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Tuple with bad input: ${dataItem}`);
+        }
+        this._tupleSignature = this._computeSignatureOfMembers();
+    }
+
+    public getSignature(): string {
+        return this._tupleSignature;
+    }
+}