feat(statics): model Token-2022 extensions on SolCoin#9275
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akarath
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Jul 17, 2026
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TICKET: CSHLD-1194
Add SolTokenExtensionType and SolTokenExtensions to represent the Token-2022 extensions detected on a Solana mint, plus authority and per-extension config (transfer fee, transfer hook, permanent delegate, interest bearing, scaled UI amount, default account state). Add the getUnsupportedSolTokenExtensions safety-gate helper and SUPPORTED_SOL_TOKEN_EXTENSIONS allowlist so onboarding can hard-stop on any extension BitGo has no handling code for. Thread an optional tokenExtensions through SolCoin and the solToken/tsolToken factories, and add a SolCoin.hasExtension helper. Purely additive and backward compatible — existing token definitions are unchanged.