diff --git a/lib/cocoa/TTransport.h b/lib/cocoa/TTransport.h
new file mode 100644
index 0000000..bb0270e
--- /dev/null
+++ b/lib/cocoa/TTransport.h
@@ -0,0 +1,17 @@
+@protocol TTransport <NSObject>
+
+  /**
+   * Guarantees that all of len bytes are 
+   *
+   * @param buf Array to read into
+   * @param off Index to start reading at
+   * @param len Maximum number of bytes to read
+   * @return The number of bytes actually read, which must be equal to len
+   * @throws TTransportException if there was an error reading data
+   */
+- (int) readAll: (uint8_t *) buf offset: (int) off length: (int) len;
+
+- (void) write: (const uint8_t *) data offset: (unsigned int) offset length: (unsigned int) length;
+
+- (void) flush;
+@end