AaronZhang

Last week I posted Eltoo State Chain on Signet: Three Rounds, Six Transactions (APO+CTV). This post is a counterpart to that experiment – same 3-round Alice/Bob/Carol scenario, switching the primitive to CSFS+CTV. The result is two on-chain transactions instead of six. No new opcode, no OP_CAT – only CSFS and CTV, both already activated on Inquisition signet.

What I didWhat I did

Encoded 3 rounds of state progression into a single CSFS delegation chain (a ladder), with CTV enforcing the final 3-output settlement:

State 0: Alice 50,000  Bob 30,000  Carol 20,000  (initial)
State 1: Alice 45,000  Bob 35,000  Carol 20,000  (Alice pays Bob)
State 2: Alice 40,000  Bob 35,000  Carol 25,000  (Alice pays Carol)

Tapscript (42 bytes)Tapscript (42 bytes)

\<K\_pub\_32> OP\_CHECKSIGFROMSTACK OP\_VERIFY
OP\_CHECKSIGFROMSTACK OP\_VERIFY
OP\_CHECKSIGFROMSTACK OP\_VERIFY
OP\_CHECKSIGFROMSTACK OP\_VERIFY
OP\_CHECKTEMPLATEVERIFY

4x CSFS (3 delegation hops + 1 settlement signing) + 1x CTV (output enforcement).

Flat. No stack manipulation opcodes.

...read more at delvingbitcoin.org