Module utils

Common Ethereum utilities.

Structs

Keccak256

Simple Keccak-256 hasher.

Unit

Ethereum unit. Always less than 77.

Enums

DecimalSeparator

Decimal separator for number formatting

ParseUnits

This enum holds the numeric types that a possible to be returned by parse_units and that are taken by format_units.

UnitsError

Error type for Unit-related operations.

Constants

EIP191_PREFIX

The prefix used for hashing messages according to EIP-191.

KECCAK256_EMPTY

The Keccak-256 hash of the empty string "".

Functions

box_try_new

Allocates memory on the heap then places x into it, returning an error if the allocation fails.

box_try_new_uninit

Constructs a new box with uninitialized contents on the heap, returning an error if the allocation fails.

eip191_hash_message

Hash a message according to EIP-191 (version 0x01).

eip191_message

Constructs a message according to EIP-191 (version 0x01).

format_ether

Formats the given number of Wei as an Ether amount.

format_units

Formats the given number of Wei as the given unit.

format_units_with

Formats the given number of Wei as the given unit with a custom decimal separator.

keccak256

Simple interface to the Keccak-256 hash function.

parse_ether

Converts the input to a U256 and converts from Ether to Wei.

parse_units

Parses a decimal number and multiplies it with 10^units.

try_collect_vec

Tries to collect the elements of an iterator into a Vec.

vec_try_with_capacity

Tries to create a Vec with the given capacity.