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decrease-allowance.ts
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decrease-allowance.ts
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import { Dec, Int, MsgExecuteContract } from '@terra-money/terra.js';
import { validateInput } from '../../utils/validate-input';
import { validateAddress } from '../../utils/validation/address';
import {
validateIsGreaterThanZero,
validateIsNumber,
} from '../../utils/validation/number';
/* eslint-disable */
type Expire = { at_height: number } | { at_time: number } | { never: {} };
interface Option {
address: string;
amount: string;
contract_address: string;
spender: string;
expires?: Expire;
}
export const fabricateCw20DecreaseAllowance = ({
address,
amount,
contract_address,
spender,
expires,
}: Option): MsgExecuteContract[] => {
validateInput([
validateAddress(address),
validateIsNumber(+amount),
validateIsGreaterThanZero(+amount),
validateAddress(spender),
]);
return [
new MsgExecuteContract(address, contract_address, {
// @see https://github.com/Anchor-Protocol/anchor-bAsset-contracts/blob/cce41e707c67ee2852c4929e17fb1472dbd2aa35/contracts/anchor_basset_token/src/contract.rs#L57
decrease_allowance: {
spender: spender,
amount: new Int(new Dec(amount).mul(1000000)).toString(),
expires: expires,
},
}),
];
};