3 files changed, 11 insertions, 15 deletions
diff --git a/packages/abi-gen-templates/contract.handlebars b/packages/abi-gen-templates/contract.handlebars
index 9b2a2b336..7e7171c70 100644
--- a/packages/abi-gen-templates/contract.handlebars
+++ b/packages/abi-gen-templates/contract.handlebars
@@ -85,7 +85,7 @@ export class {{contractName}}Contract extends BaseContract {
     }
     constructor(abi: ContractAbi, address: string, provider: Provider, txDefaults?: Partial<TxData>) {
         super('{{contractName}}', abi, address, provider, txDefaults);
-        classUtils.bindAll(this, ['_ethersInterfacesByFunctionSignature', 'address', 'abi', '_web3Wrapper']);
+        classUtils.bindAll(this, ['_abiEncoderByFunctionSignature', 'address', 'abi', '_web3Wrapper']);
     }
 } // tslint:disable:max-file-line-count
 // tslint:enable:no-unbound-method
diff --git a/packages/abi-gen-templates/partials/callAsync.handlebars b/packages/abi-gen-templates/partials/callAsync.handlebars
index ddbbe7508..0fe8b0463 100644
--- a/packages/abi-gen-templates/partials/callAsync.handlebars
+++ b/packages/abi-gen-templates/partials/callAsync.handlebars
@@ -7,9 +7,8 @@ async callAsync(
     const functionSignature = '{{this.functionSignature}}';
     const inputAbi = self._lookupAbi(functionSignature).inputs;
     [{{> params inputs=inputs}}] = BaseContract._formatABIDataItemList(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString.bind(self));
-    BaseContract.strictArgumentEncodingCheck(inputAbi, [{{> params inputs=inputs}}]);
-    const ethersFunction = self._lookupEthersInterface(functionSignature).functions.{{this.name}};
-    const encodedData = ethersFunction.encode([{{> params inputs=inputs}}]);
+    const abiEncoder = self._lookupAbiEncoder(functionSignature);
+    const encodedData = abiEncoder.encode([{{> params inputs=inputs}}]);
     const callDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
         {
             to: self.address,
@@ -20,7 +19,8 @@ async callAsync(
     );
     const rawCallResult = await self._web3Wrapper.callAsync(callDataWithDefaults, defaultBlock);
     BaseContract._throwIfRevertWithReasonCallResult(rawCallResult);
-    let resultArray = ethersFunction.decode(rawCallResult);
+    const decodingRules = {structsAsObjects: false};
+    let resultArray = abiEncoder.decodeReturnValues(rawCallResult, decodingRules);
     const outputAbi = (_.find(self.abi, {name: '{{this.name}}'}) as MethodAbi).outputs;
     resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._lowercaseAddress.bind(this));
     resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._bnToBigNumber.bind(this));
diff --git a/packages/abi-gen-templates/partials/tx.handlebars b/packages/abi-gen-templates/partials/tx.handlebars
index b39156583..102316b44 100644
--- a/packages/abi-gen-templates/partials/tx.handlebars
+++ b/packages/abi-gen-templates/partials/tx.handlebars
@@ -9,10 +9,8 @@ public {{this.tsName}} = {
     {{/this.payable}}
     ): Promise<string> {
         const self = this as any as {{contractName}}Contract;
-        const inputAbi = self._lookupAbi('{{this.functionSignature}}').inputs;
-        [{{> params inputs=inputs}}] = BaseContract._formatABIDataItemList(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString.bind(self));
-        BaseContract.strictArgumentEncodingCheck(inputAbi, [{{> params inputs=inputs}}]);
-        const encodedData = self._lookupEthersInterface('{{this.functionSignature}}').functions.{{this.name}}.encode([{{> params inputs=inputs}}]);
+        const abiEncoder = self._lookupAbiEncoder('{{this.functionSignature}}');
+        const encodedData = abiEncoder.encode([{{> params inputs=inputs}}], {optimize: false});
         const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
             {
                 to: self.address,
@@ -33,9 +31,8 @@ public {{this.tsName}} = {
         txData: Partial<TxData> = {},
     ): Promise<number> {
         const self = this as any as {{contractName}}Contract;
-        const inputAbi = self._lookupAbi('{{this.functionSignature}}').inputs;
-        [{{> params inputs=inputs}}] = BaseContract._formatABIDataItemList(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString);
-        const encodedData = self._lookupEthersInterface('{{this.functionSignature}}').functions.{{this.name}}.encode([{{> params inputs=inputs}}]);
+        const abiEncoder = self._lookupAbiEncoder('{{this.functionSignature}}');
+        const encodedData = abiEncoder.encode([{{> params inputs=inputs}}]);
         const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
             {
                 to: self.address,
@@ -51,9 +48,8 @@ public {{this.tsName}} = {
     {{> typed_params inputs=inputs}}
     ): string {
         const self = this as any as {{contractName}}Contract;
-        const inputAbi = self._lookupAbi('{{this.functionSignature}}').inputs;
-        [{{> params inputs=inputs}}] = BaseContract._formatABIDataItemList(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString);
-        const abiEncodedTransactionData = self._lookupEthersInterface('{{this.functionSignature}}').functions.{{this.name}}.encode([{{> params inputs=inputs}}]);
+        const abiEncoder = self._lookupAbiEncoder('{{this.functionSignature}}');
+        const abiEncodedTransactionData = abiEncoder.encode([{{> params inputs=inputs}}]);
         return abiEncodedTransactionData;
     },
     {{> callAsync}}