1 files changed, 4 insertions, 3 deletions
diff --git a/packages/web3-wrapper/src/web3_wrapper.ts b/packages/web3-wrapper/src/web3_wrapper.ts
index 5dd1150d7..c21d66d0b 100644
--- a/packages/web3-wrapper/src/web3_wrapper.ts
+++ b/packages/web3-wrapper/src/web3_wrapper.ts
@@ -1,4 +1,5 @@
 import { assert } from '@0xproject/assert';
+import { schemas } from '@0xproject/json-schemas';
 import { AbiDecoder, addressUtils, BigNumber, intervalUtils, promisify } from '@0xproject/utils';
 import {
     BlockParam,
@@ -456,6 +457,7 @@ export class Web3Wrapper {
      * @returns Estimated gas cost
      */
     public async estimateGasAsync(txData: Partial<TxData>): Promise<number> {
+        assert.doesConformToSchema('txData', txData, schemas.txDataSchema, [schemas.addressSchema, schemas.numberSchema, schemas.jsNumber]);
         const txDataHex = marshaller.marshalTxData(txData);
         const gasHex = await this._sendRawPayloadAsync<string>({ method: 'eth_estimateGas', params: [txDataHex] });
         const gas = utils.convertHexToNumber(gasHex);
@@ -468,6 +470,7 @@ export class Web3Wrapper {
      * @returns The raw call result
      */
     public async callAsync(callData: CallData, defaultBlock?: BlockParam): Promise<string> {
+        assert.doesConformToSchema('callData', callData, schemas.callDataSchema, [schemas.addressSchema, schemas.numberSchema, schemas.jsNumber]);
         if (!_.isUndefined(defaultBlock)) {
             Web3Wrapper._assertBlockParam(defaultBlock);
         }
@@ -488,9 +491,7 @@ export class Web3Wrapper {
      * @returns Transaction hash
      */
     public async sendTransactionAsync(txData: TxData): Promise<string> {
-        if (_.isUndefined(txData.from)) {
-            throw new Error(`txData is missing required "from" address.`);
-        }
+        assert.doesConformToSchema('txData', txData, schemas.txDataSchema, [schemas.addressSchema, schemas.numberSchema, schemas.jsNumber]);
         const txDataHex = marshaller.marshalTxData(txData);
         const txHash = await this._sendRawPayloadAsync<string>({ method: 'eth_sendTransaction', params: [txDataHex] });
         return txHash;