Can you stop the evil cat thief from eating the Reuben sandwich before it's too late?! 🥪🐱
- Rust https://www.rust-lang.org/tools/install
- Bitcoin Inquisition node https://github.com/bitcoin-inquisition/bitcoin
follow this guide to compile bitcoin (works for the inquisition fork) I will add a docker file or something to do this eventually
Install rustup
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | shTo start the game, run the following commands
Start a bitcoin inquisition node in regtest (i had to add fallback fee for now to get it to work)
./bitcoind -regtest -fallbackfee=0.0001install and run the game!
git clone https://github.com/stutxo/Op_SecureTheSandwich.git
cd op_securethesandwich
cargo run➜ op_securethesandwich git:(main) cargo run
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.03s
Running `target/debug/op_securethesandwich`
Wallet loaded successfully.
🥶 basement fridge address: bcrt1qlay8zlqhrsly9u0q9mmnlfjmrvccp9f3j0jehz
🧊 kitchen fridge (CTV Vault Address):
bcrt1pm6wlh2m0cmztr07nurwm6emuv8u0hann2md3jc9a40rjnp3m4trqea3w3q
🍴 Kitchen (CTV Unvault Address):
bcrt1p32dh4uqmy7qcvssvja5pmeyenu327fvyn5nks7908egux9376pnqfemal3
😋 You start making a delicious reuben sandwich...! You look forward to eating it later,
but hope your evil cat doesnt try to steal it first
(Mining 101 blocks to funding address:
bcrt1qv6zu4ectzyq4zneqhra4sxssceqcmxsw7gdk4v)
🥪 You place the reuben sandwich in the kitchen fridge
(Funding transaction sent:
091a599788a3a6d1bbe42de1a527372b148db6e5453e92ce0046b24a2c77640c)
Press Enter to continue...
⌛ Some more time passes... (Mining 1 block)
🚨 Someone took the reuben sandwich out of the fridge!! or something...😹
(Transaction from vault sent to unvault address:
TXID 279bc3c4279e9edd130722ade1e85f0e0b7d518beff7d178852f97daa06c91df)
Press Enter to continue...
🕗 Even more time passes... (Mining 1 block)
📲 Your super smart fridge texts you the following alert: Your delicious reuben
sandwich has been taken from the fridge and moved into the kitchen!
(TXID 279bc3c4279e9edd130722ade1e85f0e0b7d518beff7d178852f97daa06c91df FOUND IN MEMPOOL!!)
Press Enter to continue...
What do you want to do? (enter a number between 1 and 3)
1: Run to the kitchen to rescue the reuben sandwich and take it to the really cold
fridge in your basement (sweep funds to cold storage address)
2: Put the sandwich in the toaster and wait for it to heat up (sweep funds to hot
wallet address)
3:😹 You are the evil cat thief so you want to take the sandwich for yourself
(sweep funds to theifs address)
1
🏃 You make a run for the kitchen to investigate!!
Press Enter to continue...
⏳ The evil cat tried to eat the sandwich but its not ready to eat yet!!!
(hot wallet spend path failed as 100 blocks have not passed):
Err(JsonRpc(Rpc(RpcError { code: -26 message: "non-BIP68-final", data: None })))
Choose an option below:
1: Put the sandwich in the really cold fridge in your basement so you can eat it later
(sweep funds to cold storage address)
2:😹 You are the evil cat thief so you want to take the sandwich home to your own
fridge and eat it later (try and sweep funds to a different cold storage address)
1
❄️ You put the sandwich in the really cold fridge in your basement so you can eat it later.
You think to yourself that its really amazing how i can secure this sandwich so easily
and not have to worry about backing up any crazy weird stuff to recreate the sandwich.
You also think to yourself that it was a weird thing to think about
(Transaction from vault to cold storage sent:
ff2f76c9f144ea2b6f8220645ccb2a2c0a8b6f6d8696dfcb9b8ceffb95a581d7)This is a reimplentation of jamesob's simple-ctv-vault. You can read more here https://github.com/jamesob/simple-ctv-vault
You Send bitcoin to a vault address. Then when you want to spend from this address, you can only send the bitcoin to another unvault address using a CTV contract.
Once the bitcoin has been moved to the unvault address, you can sweep the funds to your cold storage address or sweep them to any address after 100 blocks.
Because you can see the txid of the transaction being spent from the original vault address, you can monitor this txid to see if it ends up in the mempool. If it does, you have 100 blocks to sweep the funds to your cold storage address or the funds will be sent to the hot wallet address.
flowchart TD
A(UTXO you want to vault) -->|"[some spend] e.g. P2WPKH"| V(to_vault_tx<br/>Coins are now vaulted)
V -->|"<code><H(unvault_tx)> OP_CHECKTEMPLATEVERIFY</code>"| U(unvault_tx<br/>Begin the unvaulting process)
U -->|"(cold sweep)<br/><code><H(tocold_tx)> OP_CHECKTEMPLATEVERIFY</code>"| C(tocold_tx)
U -->|"(delayed hot spend)<br/><code><block_delay> OP_CSV<br /><hot_pubkey> OP_CHECKSIG</code>"| D(<code>tohot_tx</code>)
C -->|"<code><cold_pubkey> OP_CHECKSIG</code>"| E(some undefined destination)
The ctv hash script i used is from here https://github.com/bennyhodl/dlcat
fees are hard coded for now so i need figure out how to add ephemeral anchors https://bitcoinops.org/en/topics/ephemeral-anchors/