Wallet Argument Format

When using the [Wallet Login Protocol](Wallet Login Protocol) or the [Wallet Merchant Protocol](Wallet Merchant API) it is necessary to pass arguments to and from the wallet. For security purposes these arguments are passed via the URL after the # so that they are kept secret from the wallet service provider. Because URLs are limited to about 2048 bytes of data the Wallet APIs pass arguments as a JSON string that has been compressed with LZMA and serialized to Base58.

Step 1: Compress your JSON representation

Using LZMA-JS library to compress the JSON into a binary array. This will be the most compact form of the data. This will reduce the size of the data by up to 50%.

Step 2: Convert to Base58

Using the bs58 library encode the compressed data in base58. Base58 is URL friendly and size efficient. After converting to base58 the result will be about 70% the size of the original JSON data.