1 files changed, 38 insertions, 0 deletions
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/types/blob.ts b/packages/utils/src/abi_encoder/abstract_data_types/types/blob.ts
new file mode 100644
index 000000000..f4246c893
--- /dev/null
+++ b/packages/utils/src/abi_encoder/abstract_data_types/types/blob.ts
@@ -0,0 +1,38 @@
+import { DataItem } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { CalldataBlock, CalldataBlocks, RawCalldata } from '../../calldata';
+import { DecodingRules } from '../../utils/rules';
+
+import { DataType } from '../data_type';
+import { DataTypeFactory } from '../interfaces';
+
+export abstract class Blob extends DataType {
+    protected _hasConstantSize: boolean;
+
+    public constructor(dataItem: DataItem, factory: DataTypeFactory, hasConstantSize: boolean) {
+        super(dataItem, factory);
+        this._hasConstantSize = hasConstantSize;
+    }
+
+    public generateCalldataBlock(value: any, parentBlock?: CalldataBlock): CalldataBlocks.Blob {
+        const encodedValue = this.encodeValue(value);
+        const name = this.getDataItem().name;
+        const signature = this.getSignature();
+        const parentName = parentBlock ? parentBlock.getName() : '';
+        const block = new CalldataBlocks.Blob(name, signature, parentName, encodedValue);
+        return block;
+    }
+
+    public generateValue(calldata: RawCalldata, rules: DecodingRules): any {
+        const value = this.decodeValue(calldata);
+        return value;
+    }
+
+    public isStatic(): boolean {
+        return this._hasConstantSize;
+    }
+
+    public abstract encodeValue(value: any): Buffer;
+    public abstract decodeValue(calldata: RawCalldata): any;
+}