Commit js, ts, and definitions in separate folders

ts_src/crypto.ts

@@ -0,0 +1,21 @@
+const createHash = require('create-hash')
+
+export function ripemd160 (buffer: Buffer): Buffer {
+  return createHash('rmd160').update(buffer).digest()
+}
+
+export function sha1 (buffer: Buffer): Buffer {
+  return createHash('sha1').update(buffer).digest()
+}
+
+export function sha256 (buffer: Buffer): Buffer {
+  return createHash('sha256').update(buffer).digest()
+}
+
+export function hash160 (buffer: Buffer): Buffer {
+  return ripemd160(sha256(buffer))
+}
+
+export function hash256 (buffer: Buffer): Buffer {
+  return sha256(sha256(buffer))
+}