script to check channel signature

lbry/scripts/check_signature.py

@@ -0,0 +1,32 @@
+import argparse
+import sqlite3
+from binascii import hexlify
+from lbry.wallet.transaction import Output
+
+
+def check(db_path, claim_id):
+    db = sqlite3.connect(db_path)
+    db.row_factory = sqlite3.Row
+    claim = db.execute('select * from claim where claim_id=?', (claim_id,)).fetchone()
+    if not claim:
+        print('Could not find claim.')
+        return
+    channel = db.execute('select * from claim where claim_hash=?', (claim['channel_hash'],)).fetchone()
+    if not channel:
+        print('Could not find channel for this claim.')
+    print(f"Claim: {claim['claim_name']}")
+    print(f"Channel: {channel['claim_name']}")
+    print(f"Signature: {hexlify(claim['signature']).decode()}")
+    print(f"Digest: {hexlify(claim['signature_digest']).decode()}")
+    print(f"Pubkey: {hexlify(channel['public_key_bytes']).decode()}")
+    print("Valid: {}".format(Output.is_signature_valid(
+        claim['signature'], claim['signature_digest'], channel['public_key_bytes']
+    )))
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument('db_path')
+    parser.add_argument('claim_id')
+    args = parser.parse_args()
+    check(args.db_path, args.claim_id)