Function gen_word_from 

pub fn gen_word_from(values: &[&str]) -> U256

Available on crate features test-utils only.

Test helper function for constructing EVM words from hex string literals.

Takes an array of hex strings (with or without “0x” prefix), concatenates them left-to-right, left-pads with zeros to 32 bytes, and returns a U256.

Example

let word = gen_word_from(&[
    "0x2a",                                        // 1 byte
    "0x1111111111111111111111111111111111111111",  // 20 bytes
    "0x01",                                        // 1 byte
]);
// Produces: [10 zeros] [0x2a] [20 bytes of 0x11] [0x01]