Some untested ideas for other Proof of Work scripts:
decodescript 82013d0146a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac
{
"asm": "OP_SIZE 61 70 OP_WITHIN OP_VERIFY 0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 OP_CHECKSIG",
"desc": "raw(82013d0146a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac)#mes5v53f",
"type": "nonstandard",
"p2sh": "2Mw2fy8vwiyUKhVFrrD6VzXUahLTwr6P2nZ",
"segwit": {
"asm": "0 55582b7319de48ac18d654fba1400d417fa9249e3ba454fdb033b8937f5363d7",
"desc": "addr(tb1q24vzkucemey2cxxk2na6zsqdg9l6jfy78wj9fldsxwufxl6nv0tspelg8s)#5rzugfva",
"hex": "002055582b7319de48ac18d654fba1400d417fa9249e3ba454fdb033b8937f5363d7",
"address": "tb1q24vzkucemey2cxxk2na6zsqdg9l6jfy78wj9fldsxwufxl6nv0tspelg8s",
"type": "witness_v0_scripthash",
"p2sh-segwit": "2NEBNyCcTMriMw346rwgvQ7yxPHZ5PUQVUH"
}
}
Assuming standardness rules are enforced properly, and signatures should be minimal, or they are otherwise invalid, it should give an incentive to grind alternative points to half of the generator:
+--------+----------------------------------------------------------------+--------------------------------------------------------------------------------------+
| Number | Address | Script |
+--------+----------------------------------------------------------------+--------------------------------------------------------------------------------------+
| 70 | tb1q24vzkucemey2cxxk2na6zsqdg9l6jfy78wj9fldsxwufxl6nv0tspelg8s | 82013d0146a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 69 | tb1qg57rdw4sl24cddmxghwd0dewgkzh55nracgfycz57hgzt0dsadhsz4wq6a | 82013d0145a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 68 | tb1q777srl54ha3mauekxvz9p3qlvcz92za66p2lhc3gnnrp37ljcjasryuegs | 82013d0144a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 67 | tb1qd07mp98yc2n9vna7ue0fk7645ecuf54uzn8rm08m8zj5u778hexspncvqd | 82013d0143a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 66 | tb1qzvsxvwf4d6fcmsx7v6jj7xmwdtwr9knjud95gsndr3e5cmgsgwpqlky0z5 | 82013d0142a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 65 | tb1qxstamf0k9c89m7gmk5fknxsr2qwxgtdlljp2q4mm3m76l95plp3qx05ge2 | 82013d0141a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 64 | tb1q6eefcrmcfu4uh05luuejmhfq2u3c5qmwytlmcc9kylccvlqfdelsdsrdvh | 82013d0140a569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 63 | tb1qwluz4cqyu0nrm0cyrg94hp9y48z3lr4h6g9faa9afkr04lhtvuas73z02z | 82013d013fa569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 62 | tb1qk53l375y9pw84dcddx4sxax7dy6k08udzm8nt5dqwldhxtuck56qaamcw8 | 82013d013ea569210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
| 61 | tb1qxydp6gqyttdn55n57czq3w9q79v7vgdtgh7j3u33flhepwglskas506hqj | 82013d88210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac |
+--------+----------------------------------------------------------------+--------------------------------------------------------------------------------------+
And also, some hash-based Proof of Work:
+------------+----------------------------------------------------------------+--------+
| Function | Address | Script |
+------------+----------------------------------------------------------------+--------+
| RIPEMD-160 | tb1q7l4c7xqjnc5uxzawu0nu7tld8g7209xcmv8xqj0ks8844jf9cstsz8ule9 | a67cac |
| SHA-1 | tb1qwaarn9ss7znnrqr44r2jrku43nc3w38xvmarf7pecpj9uqpccguqvzpn9y | a77cac |
| SHA-256 | tb1qx6ylc8wx4t0cu40tdy7d49zntjxwrk0tusmg7c9p22aprzlu9e7s58cm30 | a87cac |
| OP_HASH160 | tb1qesygpz74dkk94xqh7fhu368m5mycxaurap7rlcdgjt9l6spwf46ql0gu2p | a97cac |
| OP_HASH256 | tb1q3dzkf4xr7c4sg9d3hz8a0j45mdkuztsvrqjf2lp0z2r30ugj3f4s7d4sn3 | aa7cac |
+------------+----------------------------------------------------------------+--------+
In this case, some message is hashed first, and then, the hash should form a valid DER signature, which means grinding something around 56 bits (maybe a bit less, because there are six valid sighashes, so it is more like 54-bit hash).
decodescript a67cac
{
"asm": "OP_RIPEMD160 OP_SWAP OP_CHECKSIG",
"desc": "raw(a67cac)#03cp3pdm",
"type": "nonstandard",
"p2sh": "2N56nsSzfvJTvdtXmfyRg8PiUDD9X4BrkFD",
"segwit": {
"asm": "0 f7eb8f18129e29c30baee3e7cf2fed3a3ca794d8db0e6049f681cf5ac925c417",
"desc": "addr(tb1q7l4c7xqjnc5uxzawu0nu7tld8g7209xcmv8xqj0ks8844jf9cstsz8ule9)#hltrrgm6",
"hex": "0020f7eb8f18129e29c30baee3e7cf2fed3a3ca794d8db0e6049f681cf5ac925c417",
"address": "tb1q7l4c7xqjnc5uxzawu0nu7tld8g7209xcmv8xqj0ks8844jf9cstsz8ule9",
"type": "witness_v0_scripthash",
"p2sh-segwit": "2MzT76E56RTHJVcjjMZG5dUe8XC56Dj5hdT"
}
}