Finding Transactions with seldom used opcodes for testing

I'm trying to implement a script evaluator and would like to get some real testing data from the blockchain (testnet or mainnet). Are there transactions whose input scriptSigs combined with the previous transaction's scriptPubKey use any/all of these op_codes? I'd like to compile a collection of such transactions as test vectors.

98: op_ver,
101: op_verif,
102: op_vernotif,
107: op_toaltstack,
108: op_fromaltstack,
109: op_2drop,
111: op_3dup,
112: op_2over,
113: op_2rot,
114: op_2swap,
115: op_ifdup,
116: op_depth,
119: op_nip,
120: op_over,
121: op_pick,
122: op_roll,
123: op_rot,
125: op_tuck,
139: op_1add,
140: op_1sub,
143: op_negate,
144: op_abs,
146: op_0notequal,
147: op_add,
148: op_sub,
154: op_booland,
155: op_boolor,
156: op_numequal,
157: op_numequalverify,
158: op_numnotequal,
159: op_lessthan,
160: op_greaterthan,
161: op_lessthanorequal,
162: op_greaterthanorequal,
163: op_min,
164: op_max,
165: op_within,
168: op_sha256,
170: op_hash256,
171: op_codeseparator,

Jimmy Song

Posted 2018-10-22T03:08:12.440

Reputation: 7 067

Just to make sure I'm understanding, you'd like a compiled list of transactions which have these OP_ codes in their scriptPubKey? Would you prefer a spreadsheet and what info do you exactly need? TXID and ASM? – KappaDev – 2018-10-22T04:45:27.880

1I would like transactions which spend utxos with these op codes either in the scriptPubKey or redeemScript. – Jimmy Song – 2018-10-22T14:19:17.450

I believe the early blocks of testnet contain a bunch of unusual transactions as a sort of test suite. So that might be one place to start looking. – Nate Eldredge – 2018-10-22T14:40:10.820

@JimmySong I wrote this small PHP script which I believe should work, but after running this overnight for 12+ hours I quickly realized this is quite inefficient and will likely take too long. Perhaps someone with SQL knowledge can utilize this to obtain the required info?

– KappaDev – 2018-10-22T21:30:19.047

1@NateEldredge, I checked the first 400 or so blocks of testnet and did not find anything that uses any of these script codes. – Jimmy Song – 2018-10-22T21:59:53.687

@JimmySong: Okay, sorry about the wild goose chase. Of course, you ought to be able to manually create and spend some transactions like this on testnet, which may be more expedient than writing the code to search for existing ones. – Nate Eldredge – 2018-10-22T22:04:13.173

A slightly bigger search yielded some interesting tx's on testnet. I'll post them as my own answer. – Jimmy Song – 2018-10-23T00:52:38.873

1That'll be hard. OP_RESERVED, OP_RESERVED1, OP_RESERVED2, OP_VER, OP_VERIF, OP_VERNOTIF all immediately cause the script to fail, so they can't occur (unless in an unexecuted IF branch) in a valid spend. OP_VERIF and OP_VERNOTIF even cause failure when in an unexecuted IF branch. – Pieter Wuille – 2018-10-23T01:13:08.000

Thanks @PieterWuille, I was confused about that. So it's a lot like OP_RETURN but for IF branches? I guess I just need the last 4, then. – Jimmy Song – 2018-10-23T01:21:34.480

Finding Transactions with seldom used opcodes for testing

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