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itemtradegrouptonpc.dbss

Binary layout, byte coverage, field semantics, and exact snapshot evidence for the intrinsic BSD itemtradegrouptonpc decoder.

Investigation status

Status Value
Coverage 100%
Iteration 4
Review state BSD migration reconciled
Last reviewed 2026-07-31
Captures examined Build 2938; installed pad00000.meta SHA-256 b7eefe6059818f84c0545f10020fe93bd3bd5d0647e043120caf78726ccafe8f; 207,256-byte primary SHA-256 62586ce4a817a29495dc9b720e2fc34fcd47912b7e933bebdbe1babf4a2b031b; 125 rows and 1,626 entries; normalized SHA-256 deb6e24199324c215facf6527c8410ca99e5e166a1b1c9e02f11101b3f841076
Decoder packages/scraper/src/tables/itemtradegrouptonpc.dbss.ts
Remaining blockers None

See Decoder methodology for the confidence scale and evidence rules.

itemtradegrouptonpcoffset.dbss

Open the independently decoded pointer directory used as migration evidence.

Field ledger

Field/path Offset and width Representation Claimed meaning Physical confidence Representation confidence Semantic confidence Evidence Status
rowCount, rows[] table +0, 4 then rows retained u32 peek and counted array NPC trade rows Certain Certain High Count frames 125 intrinsic rows; strict decoding ends at byte 207,256; all rows match the reference Closed
rows[].npcId row +0, 2 retained u16 Owner NPC identifier Certain Certain Certain Exact compact-table and both-directory key-set match Closed
rows[].entryCount, entries[] row +2, 4 then 127*n retained u32 peek and counted array Entry count and list Certain Certain Certain Counts derive all 125 companion byte lengths and partition the primary table without gaps Closed
repeated NPC validation complete nested row relational .check() Stored owner-key invariant Certain Certain Certain All 1,626 entries repeat the enclosing NPC ID; validator rejects a mutated repeat Closed
entries[].npcId entry +0, 2 retained u16 Repeated owner NPC identifier Certain Certain Certain Exhaustive equality with enclosing row IDs Closed
entries[].tradeItemId entry +2, 4 retained u32 Traded item identifier Certain Certain Certain All values resolve to level-zero item rows; lookup is intentionally deferred Closed
entries[].reserved06 entry +6..+53, 48 zero-validated reserved byte range, omitted Structural padding Certain Certain Unknown Every captured byte is zero and BSD rejects nonzero mutations Closed
entries[].field54 entry +54, 2 retained overlapping u16 peek Raw trade control Certain Certain Unknown Exact reference equality over both following byte views Closed
entries[].namespaceCode entry +54, 1 retained overlapping u8 Internal trade namespace code Certain Certain High Exact four-code set match with both source and target codes in itemtradeetc.bss Closed
entries[].field55 entry +55, 1 retained overlapping u8 Neutral high-byte control Certain Certain Unknown Recombines exactly with namespaceCode into field54; no capture-specific value validation Closed
entries[].reserved56 entry +56..+106, 51 zero-validated reserved byte range, omitted Structural padding Certain Certain Unknown Every captured byte is zero and BSD rejects nonzero mutations Closed
entries[].field107 entry +107, 2 retained overlapping u16 peek Neutral control Certain Certain Unknown Exact reference equality and exhaustive recomposition from the two byte views Closed
entries[].field107LowByte, field108 entry +107, 1; +108, 1 retained overlapping u8 views Neutral byte controls Certain Certain Unknown Recompose field107 exactly in all 1,626 entries Closed
entries[].reserved109 entry +109..+123, 15 zero-validated reserved byte range, omitted Structural padding Certain Certain Unknown Every captured byte is zero and BSD rejects nonzero mutations Closed
entries[].field124 entry +124, 2 retained overlapping u16 peek Neutral control Certain Certain Unknown Exact reference equality and exhaustive recomposition from the two byte views Closed
entries[].field124LowByte, field125 entry +124, 1; +125, 1 retained overlapping u8 views Neutral byte controls Certain Certain Unknown Recompose field124 exactly in all 1,626 entries Closed
entries[].reserved126 entry +126, 1 zero-validated reserved byte range, omitted Structural padding Certain Certain Unknown Every captured byte is zero and BSD rejects nonzero mutations Closed
entry framing each entry, 127 struct(...).fixedLength(127) validation Complete entry grammar Certain Certain Certain Every non-byte field is retained, every omission is a reserved byte range, and all 1,626 entries consume 127 bytes Closed

Active assumptions

Findings

ID Finding Evidence Schema/documentation impact Status
ITGT-01 The primary table is intrinsically framed without the offset directory. Each row is 6 + entryCount * 127 bytes; inferred starts and lengths equal all 125 directory spans and end at EOF Production schema imports no offset decoder Closed
ITGT-02 field54 contains a separately useful namespace byte. Both complete builds use the distinctive code set present in both directions of itemtradeetc.bss; raw and byte views agree exhaustively Namespace name remains High-confidence; no closed-domain validator Closed
ITGT-03 Origin/category labels for the controls at 107 and 124 remain under-proven. No exact local mapping or discriminator survives falsification Neutral names preserve the values without speculative semantics Closed
ITGT-04 The BSD migration is exactly output-equivalent to the complete reference decoder. All 125 rows and 1,626 entries match with normalized SHA-256 deb6e24199324c215facf6527c8410ca99e5e166a1b1c9e02f11101b3f841076 No compatibility adapter or post-decode deletion is required Closed

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