1 files changed, 24 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..31593c882
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/tuple.ts
@@ -0,0 +1,24 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractSetDataType } from '../abstract_data_types/types/set';
+
+export class TupleDataType extends AbstractSetDataType {
+    private readonly _signature: string;
+
+    public static matchType(type: string): boolean {
+        return type === SolidityTypes.Tuple;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory);
+        if (!TupleDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Tuple with bad input: ${dataItem}`);
+        }
+        this._signature = this._computeSignatureOfMembers();
+    }
+
+    public getSignature(): string {
+        return this._signature;
+    }
+}