diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/contract_wrappers/token_wrapper.ts | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/contract_wrappers/token_wrapper.ts b/src/contract_wrappers/token_wrapper.ts index 8c1bf6b52..a9abb4f09 100644 --- a/src/contract_wrappers/token_wrapper.ts +++ b/src/contract_wrappers/token_wrapper.ts @@ -29,6 +29,7 @@ const ALLOWANCE_TO_ZERO_GAS_AMOUNT = 45730; * to the 0x Proxy smart contract. */ export class TokenWrapper extends ContractWrapper { + public UNLIMITED_ALLOWANCE_IN_BASE_UNITS = new BigNumber(2).pow(256).minus(1); private _tokenContractsByAddress: {[address: string]: TokenContract}; private _tokenLogEventEmitters: ContractEventEmitter[]; constructor(web3Wrapper: Web3Wrapper) { @@ -80,6 +81,20 @@ export class TokenWrapper extends ContractWrapper { }); } /** + * Sets the spender's allowance to an unlimited number of baseUnits on behalf of the owner address. + * Equivalent to the ERC20 spec method `approve`. + * @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed. + * @param ownerAddress The hex encoded user Ethereum address who would like to set an allowance + * for spenderAddress. + * @param spenderAddress The hex encoded user Ethereum address who will be able to spend the set allowance. + */ + public async setUnlimitedAllowanceAsync(tokenAddress: string, ownerAddress: string, + spenderAddress: string): Promise<void> { + await this.setAllowanceAsync( + tokenAddress, ownerAddress, spenderAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS, + ); + } + /** * Retrieves the owners allowance in baseUnits set to the spender's address. * @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed. * @param ownerAddress The hex encoded user Ethereum address whose allowance to spenderAddress @@ -127,6 +142,16 @@ export class TokenWrapper extends ContractWrapper { await this.setAllowanceAsync(tokenAddress, ownerAddress, proxyAddress, amountInBaseUnits); } /** + * Sets the 0x proxy contract's allowance to a unlimited number of a tokens' baseUnits on behalf + * of an owner address. + * @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed. + * @param ownerAddress The hex encoded user Ethereum address who is setting an allowance + * for the Proxy contract. + */ + public async setUnlimitedProxyAllowanceAsync(tokenAddress: string, ownerAddress: string): Promise<void> { + await this.setProxyAllowanceAsync(tokenAddress, ownerAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS); + } + /** * Transfers `amountInBaseUnits` ERC20 tokens from `fromAddress` to `toAddress`. * @param tokenAddress The hex encoded contract Ethereum address where the ERC20 token is deployed. * @param fromAddress The hex encoded user Ethereum address that will send the funds. |