Ethers.js – How Does Comparing BigNumbers with Ethers Work?

bignumberethers.js

I am using ethers and writing tests and I don't quite understand the ethers.BigNumber.from('some number') method. Could someone please explain how it works, the documentation is not very helpful to me.
For example:
console.log(ethers.BigNumber.from('30') < ethers.BigNumber.from('120'));

returns "false"

Why is BigNumber from 30 greater than BigNumber from 120?

Best Answer

I exactly ran into the same problem. You should use the built.in methods in bignumber:

let a = ethers.BigNumber.from('30');
let b = ethers.BigNumber.from('120');
 a.lt(b) // returns true  as 30 is lower than (lt) 120

Here you use lt (lower than), you can use:

eq: equal
gte: greater or equal
gt: greater
lte: lower or equal
lt: lower

Hope it helps

Related Solutions

[Ethereum] BigNumber Error: new BigNumber() not a base 16 number:

I'm not sure and I can not test but if I were you I would try to do a result.toNumber()

Edit: And for the two Metamask I would advise to remove the web3.eth.sendTransaction When you call the contract function, the use of web3 is encapsulated. I would say you are trying to send a transaction of a contract function call. Just call the contract function.

Edit2: You call the contract function with a callback so it's asynchronous. The result is in the callback, not in the return. You can either go into callback hell or use async/await syntax like : var b = await ProjectContractInstance.getProject(1);

[Ethereum] How to get contract’s ether balance at hardhat / waffle

const { ethers, waffle} = require("hardhat");
const provider = waffle.provider;
const balance0ETH = await provider.getBalance(user1.address);

Best Answer

Related Solutions

[Ethereum] BigNumber Error: new BigNumber() not a base 16 number:

[Ethereum] How to get contract’s ether balance at hardhat / waffle

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