fixup! feat: Support Ethereum EIP-712 Sign Typed Data

Replace TextEncoder with Buffer.from(x, "utf-8).toString("hex")
for IE support.

Author: aloisklink

src/js/core/methods/EthereumSignTypedData.js

@@ -157,7 +157,6 @@ export default class EthereumSignTypedData extends AbstractMethod {
                 // $FlowIssue typedCall problem with unions in response, TODO: accept unions
                 'EthereumTypedDataValueRequest|EthereumTypedDataSignature',
                 {
-                    // $FlowIssue protobuf.js is okay with Uint8Array: TODO: update scripts/protobuf-types.js
                     value: encodedData,
                 },
             );

src/js/core/methods/helpers/ethereumTypeDataConversions.js

@@ -86,12 +86,12 @@ function intToHex(
  * @param data - The actual data to convert.
  * @returns Hex string of the data.
  */
-export function encodeData(typeName: string, data: any): string | Uint8Array {
+export function encodeData(typeName: string, data: any): string {
     if (paramTypeBytes.test(typeName) || typeName === 'address') {
         return stripHexPrefix(data);
     }
     if (typeName === 'string') {
-        return new TextEncoder().encode(data);
+        return Buffer.from(data, 'utf-8').toString('hex');
     }
     const numberMatch = paramTypeNumber.exec(typeName);
     if (numberMatch) {