You are missing the padding in the hex conversion. You’ll want to use function toHexString(byteArray) { return Array.from(byteArray, function(byte) { return (‘0’ + (byte & 0xFF).toString(16)).slice(-2); }).join(”) } so that each byte transforms to exactly two hex digits. Your expected output would be 04812d7e3a9829e5d51bdd64ceb35df060699bc1309731bd6e6f1a5443a7f9ce0af4382fcfd6f5f8a08bb2619709c2d49fb771601770f2c267985af2754e1f8cf9
^[13][a-km-zA-HJ-NP-Z1-9]{25,34}$ will match a string that starts with either 1 or 3 and, after that, 25 to 34 characters of either a-z, A-Z, or 0-9, excluding l, I, O and 0 (not valid characters in a Bitcoin address).
Actually, you CAN get the whole Bitcoin trades history from Bitcoincharts in CSV format here : http://api.bitcoincharts.com/v1/csv/ it is updated twice a day for active exchanges, and there is a few dead exchanges, too. EDIT: Since there are no column headers in the CSVs, here’s what they are : column 1) the trade’s timestamp, column … Read more
The first and second attempts in your question are nothing alike. First one uses json rpc to ask the daemon for the balance (and I dare say it’s the proper way – you don’t take the top off your car engine and push the pistons up and down yourself to achieve forward motion, do you?) … Read more