fix(sdk-coin-sol): recognize Token ACL thaw in WASM explain - #9692
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Ranjna-G
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Sep 9, 2026
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TICKET: CSHLD-1182
Token enablement (and transfer) prebuilds for Token-2022 mints gated by the sRFC-37 Token ACL program append a ThawPermissionlessIdempotent instruction (program TACLkU6..., discriminator 9) after the ATA-init /TokenTransfer. The JS-side classifier (getInstructionType) knows this program, but the WASM explain path (tsol) does not: @bitgo/wasm-solana
parses the instruction as Unknown, and deriveTransactionType falls through to CustomTx, so verifyTxType rejects enablement with: Invalid transaction type on token enablement: expected "AssociatedTokenAccountInitialization", got "CustomTx".
Mirror the JS-side handling in explainTransactionWasm.ts: treat Unknown instructions from the Token ACL program like boilerplate — excluded from the meaningful-instruction ATA check and from the Unknown->CustomTx trigger (which also fixes token transfers carrying the thaw, previously misclassified as CustomTx instead of Send).
Verified against sdk-coin-sol 8.8.0 on a devnet Token-2022 mint (TransferHook + DefaultAccountState frozen + Token ACL permissionless thaw enabled):