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Nodash - Lodash for Noir

Nodash is a utility library for Noir language.

Installation

Put this into your Nargo.toml.

If you are using Noir:

nodash = { git = "https://github.com/olehmisar/nodash/", tag = "noir-v0.34.1" }

If you are using Aztec:

nodash = { git = "https://github.com/olehmisar/nodash/", tag = "aztec-v0.54.0" }

Docs

sqrt

use nodash::sqrt;

assert(sqrt(4 as u64) == 2);

// it floors the result
assert(sqrt(8 as u64) == 2);

clamp

use nodash::clamp;

// if too small, return min
assert(clamp(1 as u64, 2 as u64, 3 as u64) == 2 as u64);
// if too big, return max
assert(clamp(4 as u64, 1 as u64, 3 as u64) == 3 as u64);
// if in range, return value
assert(clamp(2 as u64, 1 as u64, 3 as u64) == 2 as u64);

solidity::encode_with_selector

Equivalent to abi.encodeWithSelector in Solidity.

use nodash::solidity::encode_with_selector;

let selector: u32 = 0xa9059cbb; // transfer(address,uint256)
let args: [Field; 2] = [
  0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045, // address
  123 // uint256
];
let encoded = encode_with_selector(selector, args);
// typeof encoded: [u8; 68]

to_hex_string_bytes

Converts a Field to a hex string.

fn to_hex_string_bytes(value: Field) -> [u8; 64]

array_concat

Concatenates two arrays.

use nodash::array_concat;

assert(array_concat([1, 2, 3], [4, 5]) == [1, 2, 3, 4, 5]);