JBIpfsDecoder

Git Source

Utilities to decode an IPFS hash.

This is fairly gas intensive due to multiple nested loops. Onchain IPFS hash decoding is not advised – storing them as a string might be more efficient for that use-case.

State Variables

ALPHABET

Just a kind reminder to our readers.

Used in base58ToString

bytes internal constant ALPHABET = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";

Functions

decode

function decode(string memory baseUri, bytes32 hexString) internal pure returns (string memory);

_toBase58

Convert a hex string to base58

Written by Martin Ludfall - Licence: MIT

function _toBase58(bytes memory source) private pure returns (string memory);

_truncate

function _truncate(uint8[] memory array, uint8 length) private pure returns (uint8[] memory);

_reverse

function _reverse(uint8[] memory input) private pure returns (uint8[] memory);

_toAlphabet

function _toAlphabet(uint8[] memory indices) private pure returns (bytes memory);