Merge pull request #28 from 0xProject/erc20transfer

Add transfer function and tests for it

2 files changed, 17 insertions, 1 deletions

diff --git a/src/contract_wrappers/token_wrapper.ts b/src/contract_wrappers/token_wrapper.ts
index 35e008905..cedbfbdae 100644
--- a/src/contract_wrappers/token_wrapper.ts
+++ b/src/contract_wrappers/token_wrapper.ts
@@ -52,7 +52,7 @@ export class TokenWrapper extends ContractWrapper {
      * of an owner address.
      */
     public async setProxyAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                        amountInBaseUnits: BigNumber.BigNumber) {
+                                        amountInBaseUnits: BigNumber.BigNumber): Promise<void> {
         assert.isETHAddressHex('ownerAddress', ownerAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         assert.isBigNumber('amountInBaseUnits', amountInBaseUnits);
@@ -69,6 +69,21 @@ export class TokenWrapper extends ContractWrapper {
             gas,
         });
     }
+    /**
+     * Transfers `amountInBaseUnits` ERC20 tokens from `fromAddress` to `toAddress`.
+     */
+    public async transferAsync(tokenAddress: string, fromAddress: string, toAddress: string,
+                               amountInBaseUnits: BigNumber.BigNumber): Promise<void> {
+        assert.isETHAddressHex('tokenAddress', tokenAddress);
+        assert.isETHAddressHex('fromAddress', fromAddress);
+        assert.isETHAddressHex('toAddress', toAddress);
+        assert.isBigNumber('amountInBaseUnits', amountInBaseUnits);
+
+        const tokenContract = await this.getTokenContractAsync(tokenAddress);
+        await tokenContract.transfer(toAddress, amountInBaseUnits, {
+            from: fromAddress,
+        });
+    }
     private async getTokenContractAsync(tokenAddress: string): Promise<TokenContract> {
         let tokenContract = this.tokenContractsByAddress[tokenAddress];
         if (!_.isUndefined(tokenContract)) {
diff --git a/src/types.ts b/src/types.ts
index 3619c800f..5b514bdc4 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -38,6 +38,7 @@ export interface TokenContract {
     allowance: {
         call: (ownerAddress: string, allowedAddress: string) => Promise<BigNumber.BigNumber>;
     };
+    transfer: (to: string, amountInBaseUnits: BigNumber.BigNumber, txOpts: TxOpts) => Promise<boolean>;
     approve: (proxyAddress: string, amountInBaseUnits: BigNumber.BigNumber, txOpts: TxOpts) => void;
 }