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Anton Sauchyk
9a3f2c0bfb
create_v2 instructions can legally omit the trailing is_cashback_enabled OptionBool from the wire; decode_instruction rejected that form, so every consumer of parse_token_creation_from_instruction silently dropped those coins (the committed blocksubscribe fixture carries one such 145-byte create_v2). - When the arg buffer is exhausted and every remaining arg is option-typed (native option or pump.fun's OptionBool), report them as unset (None) instead of failing the decode; mandatory args still fail. - Count trailing optional args as 0 bytes in the instruction min-size table. - Decode Anchor's native option type (1-byte tag + value), previously unsupported entirely - update_buyback_config's Option<u64> could not even be sized. - Add learning-examples/verify_create_v2_optional_args.py machine-checking the omitted, present, truncated-mandatory and native-option forms plus the event-parser path against the committed fixture. - Drop the append-0x00 workaround in verify_extreme_fast_zero_rpc.py and update the stale CLAUDE.md note about the strict decoder. Fixes #184 Co-authored-by: Claude Fable 5 <noreply@anthropic.com>