Data commit

Task/Bitcoin-address-validation/UNIX-Shell/bitcoin-address-validation.sh

@@ -0,0 +1,28 @@
+base58=({1..9} {A..H} {J..N} {P..Z} {a..k} {m..z})
+bitcoinregex="^[$(printf "%s" "${base58[@]}")]{34}$"
+
+decodeBase58() {
+    local s=$1
+    for i in {0..57}
+    do s="${s//${base58[i]}/ $i}"
+    done
+    dc <<< "16o0d${s// /+58*}+f"
+}
+
+checksum() {
+    xxd -p -r <<<"$1" |
+    openssl dgst -sha256 -binary |
+    openssl dgst -sha256 -binary |
+    xxd -p -c 80 |
+    head -c 8
+}
+
+checkBitcoinAddress() {
+    if [[ "$1" =~ $bitcoinregex ]]
+    then
+        h=$(decodeBase58 "$1")
+        checksum "00${h::${#h}-8}" |
+        grep -qi "^${h: -8}$"
+    else return 2
+    fi
+}