/*
public library interface
function loadNodeStruct(xpub, version_public) {
            stringToUTF8(xpub, _xpub, XPUB_SIZE);
            if (_hdnode_deserialize(_xpub, version_public, 0, _hdnode, 0) !== 0) {
                throw new Error("Wrong XPUB type!!"); // abort everything (should not happen, should be catched already outside of asm.js, but this is emergency)
            };
            fingerprint = _hdnode_fingerprint(_hdnode);
        }