Compiler
- Added `name` syntactic sugar for `OP_READ_CACHE_SIZE s"name"`
- Added more aliases:
- `EQ` for `OP_EQUAL`
- `EQV` for `OP_EQUAL_VERIFY`
- `CS` for `OP_CHECK_SIG`
VM
- Changed `OP_TAPROOT` to take the root from the stack instead of from the tape;
it also now takes an allowable_sigflag param from the tape instead of from
cache key`b'trsf'`. Locking script syntax now consistent with `OP_CHECK_SIG`:
`push x<root> taproot x<allowable_sigflags>`.
- Fixed `OP_EVAL`: it will now cause a `ScriptExecutionError` with message
"callstack limit exceeded" instead of a Python "max recursion limit exceeded"
error. This change makes it subject to the same callstack limit of everything
else, and calls to it increase the callstack count.
- Added option to include aliases in `add_opcode`
Tools
- REPL:
- Added decompilation feature to repl (type `~~` followed by the hexadecimal
byte codes of a script to see the disassembled script)
- Can now pass a `cache_file` path to the repl invocation, and it will load it
- Repl now automatically sets the "timestamp" cache value to the Unix epoch
timestamp at the time the repl is invoked
- Added macro:
- `~ts` to set the timestamp in the cache to current Unix epoch ts.
- `~~` followed by the hexadecimal byte codes of a script to disassemble it
- `~d` to decode the top stack item into a signed int and print it
- `~f` to decode the top stack item into a float and print it
- `~s[1-8] value` to set a sigfield to the value; if the value has "x" in
the first 2 chars, it will be interpreter as hexadecimal; otherwise, it
will be interpreted as a string
- Added `sign_script_prefix` parameter to many `make_*_witness` functions
- Added ability to pass `SigningKey` objects to `make_*_witness` functions
- Added ability to pass `VerifyKey` objects as pubkeys to functions that make
locks
- Updated tooling for delegate keys:
- Updated `make_delegate_key_cert`:
- Optimized the system by concatenating timestamps into the cert, saving 6
bytes in the unlocking script and enabline cert chains
- Appended a bool to indicate if the delegate can further delegate access,
adding 1 byte of overhead per cert
- Overall, the changes result in 5 bytes saved for one cert
- Updated `make_delegate_key_lock` parsing to account for new cert format
- Optimized `make_delegate_key_lock`, saving 27 bytes compared to 0.6.2 (from
125 bytes to 98), including the updated parsing
- Updated `make_delegate_key_unlock`:
- Renamed to `make_delegate_key_witness`
- New cert format saved 5 bytes overall (down to 173 bytes)
- Added `make_delegate_key_chain_lock` - 128 bytes
- Added `make_delegate_key_chain_witness` - 66 bytes + 108 bytes per cert
- Added new tools for using balanced Merklized script trees:
- `create_script_tree_balanced`
- `create_merklized_script_balanced`
- Added new tools for graftroot:
- `make_graftroot_lock` - 58 bytes
- `make_graftroot_witness_keyspend` - 67 bytes
- `make_graftroot_witness_surrogate` - 68-69 byte overhead
- Added new tools for graftroot within taproot ("graftap")
- `make_graftap_lock` - 36 bytes
- `make_graftap_witness_keyspend` - 66 bytes
- `make_graftap_witness_scriptspend` - 145 byte overhead
- Updated `make_taproot_lock` tool to reflect new `OP_TAPROOT` syntax; locking
scripts are now 36 bytes long.
- Updated `make_taproot_witness_keyspend` to remove pushing sigflags to cache
`b'trsf'`, saving 9 bytes in such witnesses (now just 67 bytes; 66 bytes for
witness that signed without blanking any sigfields).
- Added `make_nonnative_taproot_lock` that implements `OP_TAPROOT` as a demo of
cryptographic ops and a hacky optimization trick. Script size is 72 bytes.
- Added option to include aliases in `add_soft_fork`