Convert base64 cryptobot image to blob

[bhaskarSingh]

Currently, base64 type of crypto bot image is stored on IPFS. Need to convert it to blob type of jpge/png for easier access.

Here are a few helpful links and methods for resolving the issue.

1. Link: https://stackoverflow.com/questions/21227078/convert-base64-to-image-in-javascript-jquery

function base64toBlob(base64Data, contentType) {
    contentType = contentType || '';
    var sliceSize = 1024;
    var byteCharacters = atob(base64Data);
    var bytesLength = byteCharacters.length;
    var slicesCount = Math.ceil(bytesLength / sliceSize);
    var byteArrays = new Array(slicesCount);

    for (var sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
        var begin = sliceIndex * sliceSize;
        var end = Math.min(begin + sliceSize, bytesLength);

        var bytes = new Array(end - begin);
        for (var offset = begin, i = 0; offset < end; ++i, ++offset) {
            bytes[i] = byteCharacters[offset].charCodeAt(0);
        }
        byteArrays[sliceIndex] = new Uint8Array(bytes);
    }
    return new Blob(byteArrays, { type: contentType });
}

2. https://stackoverflow.com/questions/45817204/how-to-convert-base64-string-into-file-object-in-javascript-which-should-work-in

3. https://stackoverflow.com/questions/35940290/how-to-convert-base64-string-to-javascript-file-object-like-as-from-file-input-f