Fix the bug when didn't invalidate etherToken contract instance

2 files changed, 4 insertions, 0 deletions

diff --git a/src/0x.ts b/src/0x.ts
index 5938d558a..d790ca38e 100644
--- a/src/0x.ts
+++ b/src/0x.ts
@@ -172,6 +172,7 @@ export class ZeroEx {
         (this.tokenRegistry as any)._invalidateContractInstance();
         await (this.token as any)._invalidateContractInstancesAsync();
         (this.proxy as any)._invalidateContractInstance();
+        (this.etherToken as any)._invalidateContractInstance();
     }
     /**
      * Get user Ethereum addresses available through the supplied web3 instance available for sending transactions.
diff --git a/src/contract_wrappers/ether_token_wrapper.ts b/src/contract_wrappers/ether_token_wrapper.ts
index 76e7289b7..03d714bd7 100644
--- a/src/contract_wrappers/ether_token_wrapper.ts
+++ b/src/contract_wrappers/ether_token_wrapper.ts
@@ -64,6 +64,9 @@ export class EtherTokenWrapper extends ContractWrapper {
         const wethContract = await this._getEtherTokenContractAsync();
         return wethContract.address;
     }
+    private _invalidateContractInstance(): void {
+        delete this._etherTokenContractIfExists;
+    }
     private async _getEtherTokenContractAsync(): Promise<EtherTokenContract> {
         if (!_.isUndefined(this._etherTokenContractIfExists)) {
             return this._etherTokenContractIfExists;