allow for hexidecimal formatting without leading zeros

[mshakeg]

Describe the Feature

The JSON RPC spec does not allow leading zeros, however BigNumber.toHexString() returns a hexadecimal string that is formatted with leading zeroes. It'll be helpful to add a boolean withLeadingZeros to toHexString() that defaults to true(i.e. the existing behaviour), but allow for devs to get the hex string without the leading zeros.

Code Example

const bigNumber = BigNumber.from(522900);

// withLeadingZeros defaults to true
const hexString = bigNumber.toHexString(); // "0x07fa94"

// withLeadingZeros set to false to get hexString without leading zeroes.
const hexString = bigNumber.toHexString(false); // "0x7fa94"

[ricmoo]

This is the purpose of hexValue in v5 and toQuantity in v6.

The logic is a little more complex than just trimming leading zeros, since the value 0 must remain 0x0 (trimming the leading zeros would result in 0x which is an invalid quantity.