Let’s talk backup for your uber sophisticated bitcoin wallet.

Here is the miniscript for the wallet:

andor(

multi(3, keyA, keyB, keyC),

older(4032),

andor(multi(2, keyAA, keyBB),

older(32768),

and_v(v:pk(keyAAA),

after(1200000)))

)

What does this do? 3 of 3 multisig with one month zenHODL period (anti-kidnapping forced hodl period), 2 of 2 multisig after 32768 blocks in case you lose a key (or destroy a key to make a second zenHODL period), and if you really screw up (or really want a long hodl period), it becomes a single sig at block 1.2 million.

This is the corresponding wallet descriptor. It is 956 bytes. For backup, you need the following descriptor plus at least 1 seed phrase. Seed phrase is easy to backup, but descriptors are not. Maybe shoving it in an op_return makes sense. There are clever encryption compression techniques that allow any of the keys to decrypt the compressed descriptor…

wsh(andor(multi(3,[704c7836/48'/0'/0'/1']tpubDEg64i5DB13mXaEDomqxzfEk6r5quMZU6Mefps8ZpMaQNRVRrYR2HhQ3QpczyFWsCfTps5RhQVBvBLa5PtAp6mbWF7C8NiEk1YgHENKC7Ty/<0;1>/*,[97139860/48'/0'/0'/1']tpubDEQXq6vm76GVqapjRSNmtGbbREbKLTuB8k5mXaApMPDCHXWWSvdMcQZAaATmVNyXrbo3qyHpLN6ZYg2PyNiMQqiTXyLwbFiTyicuR3nq58Z/<0;1>/*,[a2ac9184/48'/0'/0'/1']tpubDE3M2d5NWZ5iSaJyqHjfHcPr1yZRyHnCPVSjZghit5WRbiWtyZxXgKs7aovrRCzoArN1byCwghk9RUL4rgNG7vCXWTaEJ1d8GHy8V7Qu2Ja/<0;1>/*),older(4032),andor(multi(2,[704c7836/48'/0'/1'/2']tpubDFaHgptN2P1HRvaHbGJUzpCz71RceFs9HwH1t4RoXvHmGY5hprtRDEspD1yYUKmGEQ1dmRE5bkF7epJ4cFXpAkvmmq9Mst5MuvND7khiP6f/<0;1>/*,[97139860/48'/0'/1'/2']tpubDEf8yQwxu1uiHhNttV9DnVSeWBwAUSug9e4JVsU4x6144Z1XxZhJbs61MLByexNGXphKK7y5bnHfuoPmHauRdnbS9ANtTDAYnikd2dUd76k/<0;1>/*),older(32768),and_v(v:pk([704c7836/48'/0'/2'/1']tpubDFaBSe3nXwdt7Vs9HkNozSY5BxokLhGtneRW8xreyUUnirK1TDi1tDSKTGsUuFxeVG74HLQFa7CidepW4PracZTnUtKxc7zgJmF19CqxNot/<0;1>/*),after(1200000)))))#7en8aad5