Web3如何调用返回字节32的方法？

Question

I am trying call method symbol, of contract DAI

contract.methods.symbol().call()

This contract returns not string, but bytes 32

And due this fact I always get err:

Number can only safely store up to 53 bits

How to do it properly?

Answer 1

As already mentioned over at the ethereum stackexchange web3 has util functions to convert between string and byte32 :

const val32 = contract.methods.symbol().call();
const valString = web3.toAscii(val32);

if you're on a web3 version 0.x.

Or:

const val32 = contract.methods.symbol().call();
const valString = web3.utils.toAscii(val32);

for a web3 version 1.0.