allowance launcher methods for presale.
increaseAllowance
increaseAllowance is a method that helps developers to increase allowance from payment method token for the presale contract if the payment token is ERC20 token. It is commonly used before any methods in the buy section pages. See more details about its usage in the section for buy method
Parameter
| Argument | Type | Description |
|---|---|---|
| tokenAddress | String | one of the payment method token of the presale contract |
| allowanceAmount | String | amount of increased allowance |
| signer | Signer | the instance to represent wallet address. |
Example
const paymentToken = PAYMENT_METHOD
// assume PAYMENT_METHOD stores a payment method from the list
// of payment methods returned by getPaymentMethods
await presaleSdk.increaseAllowance(paymentToken, amount.toString(), signer)
getAllowance
getAllowance is a method that helps get the allowance amount of a given erc20 contract for presale contract to spend. It is commonly used to check allowance of payment contract before increaseAllowance
No parameter is needed for this method
| Property | Type | Description |
|---|---|---|
| Promise | BigNumber | the amount of allowance |
Response
const allowance = await presaleSdk.getAllowance(paymentToken, await signer.getAddress())