Contract Debugging – How to Use changeEtherBalance from Waffle-Hardhat

Your value 52009946125155410 is above the maximum integer safely representable as a Number type in JavaScript: 9007199254740991 so ethers.js throws an error.

Just pass it as a string :

airdropFee: "52009946125155410" // wei value

And it should be fine.

The reason why is failing is because of the result of 15 * 10 ** 18 is beyond what is considered a safe range in Javascript.

If you print the result of this in Javascript:

console.log("Number.MAX_SAFE_INTEGER: ", Number.MAX_SAFE_INTEGER);

You'll get:

9007199254740991

Which is a 53-bit number. It has 16 digits.

If you print the result of 15 * 10 ** 18:

15000000000000000000

Way bigger than the Number.MAX_SAFE_INTEGER with 20 digits.

Check the ethersjs docs here: https://docs.ethers.org/v5/api/utils/bignumber/

To solve this, you have multiple options:

1. Convert each of the numbers to the built-in Javascript BigInt type, appending an n at the end of the number:

...setUriToUpdate(15n * 10n ** 18n)...

Convert the result to a string:

contract.setUriToUpdate("15000000000000000000").

Use ethers.BigNumber.from to convert each of the factors before multiplying:

const fifteen = ethers.BigNumber.from(15);
const ten = ethers.BigNumber.from(10);
const eighteen = ethers.BigNumber.from(18);

contract.setUriToUpdate(fifteen.mul(ten).mul(eighteen)).then(response => {
    console.log("response2: ", response) 
});

And so on.