How to convert b256 to a number and vice versa?

mpoplavkov · February 18, 2024, 1:27pm

I’m looking for a way to convert a b256 variable to u256 and vice versa.

I found this topic and it looks like there should be a way of converting it, but I couldn’t find an appropriate function/trait in Sway.

SwayStar123 · February 18, 2024, 2:11pm

let val: b256 = 0x0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20;
let result = val.as_u256();

See more methods here

github.com

FuelLabs/sway/blob/master/sway-lib-core/src/primitive_conversions.sw

library;

impl u64 {
    /// Extends a `u64` to a `u256`.
    ///
    /// # Returns
    ///
    /// * [u256] - The converted `u64` value.
    ///
    /// # Examples
    ///
    /// ```sway
    /// fn foo() {
    ///     let val = 2;
    ///     let result = val.as_u256();
    ///     assert(result == 0x0000000000000000000000000000000000000000000000000000000000000002u256);
    /// }
    /// ```
    pub fn as_u256(self) -> u256 {
        let input = (0u64, 0u64, 0u64, self);

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system · March 10, 2024, 10:12am

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How to convert b256 to a number and vice versa?

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