blocktrail / blocktrail-sdk-nodejs

var FloatArray = global.Float64Array || global.Float32Array; // make PhantomJS happy

function string_to_bytes ( str, utf8 ) {

    utf8 = !!utf8;

    var len = str.length,

        bytes = new Uint8Array( utf8 ? 4*len : len );

    for ( var i = 0, j = 0; i < len; i++ ) {

        var c = str.charCodeAt(i);

        if ( utf8 && 0xd800 <= c && c <= 0xdbff ) {

            if ( ++i >= len ) throw new Error( "Malformed string, low surrogate expected at position " + i );

            c = ( (c ^ 0xd800) << 10 ) | 0x10000 | ( str.charCodeAt(i) ^ 0xdc00 );

        }

        else if ( !utf8 && c >>> 8 ) {

            throw new Error("Wide characters are not allowed.");

        }

        if ( !utf8 || c <= 0x7f ) {

            bytes[j++] = c;

        }

        else if ( c <= 0x7ff ) {

            bytes[j++] = 0xc0 | (c >> 6);

            bytes[j++] = 0x80 | (c & 0x3f);

        }

        else if ( c <= 0xffff ) {

            bytes[j++] = 0xe0 | (c >> 12);

            bytes[j++] = 0x80 | (c >> 6 & 0x3f);

            bytes[j++] = 0x80 | (c & 0x3f);

        }

        else {

            bytes[j++] = 0xf0 | (c >> 18);

            bytes[j++] = 0x80 | (c >> 12 & 0x3f);

            bytes[j++] = 0x80 | (c >> 6 & 0x3f);

            bytes[j++] = 0x80 | (c & 0x3f);

        }

    }

    return bytes.subarray(0, j);

}

function hex_to_bytes ( str ) {

    var len = str.length;

        var e = Error.apply(this, arguments);

        this.message = e.message, this.stack = e.stack;

    }

    function c(e, t) {

        t = !!t;

        for (var r = e.length, s = new Uint8Array(t ? 4 * r : r), c = 0, i = 0; c < r; c++) {

            var a = e.charCodeAt(c);

            if (t && 55296 <= a && a <= 56319) {

                if (++c >= r) throw new Error("Malformed string, low surrogate expected at position " + c);

                a = (55296 ^ a) << 10 | 65536 | 56320 ^ e.charCodeAt(c);

            } else if (!t && a >>> 8) throw new Error("Wide characters are not allowed.");

            !t || a <= 127 ? s[i++] = a : a <= 2047 ? (s[i++] = 192 | a >> 6, s[i++] = 128 | 63 & a) : a <= 65535 ? (s[i++] = 224 | a >> 12, 

            s[i++] = 128 | a >> 6 & 63, s[i++] = 128 | 63 & a) : (s[i++] = 240 | a >> 18, s[i++] = 128 | a >> 12 & 63, 

            s[i++] = 128 | a >> 6 & 63, s[i++] = 128 | 63 & a);

        }

        return s.subarray(0, i);

    }

    function i(e) {

        return btoa(function(e, t) {

            t = !!t;