Escrow class not exported from either SDK's package root despite Exchange.escrow being a public typed property

[realfishsam]

Gap

Both SDKs attach a public escrow property of type Escrow to every hosted-trading-capable exchange instance, but neither SDK exports the Escrow class/type from its package root. A TypeScript or Python consumer can use exchange.escrow.depositTx(...) but cannot import Escrow by name to type a variable, write a function signature that accepts one, or otherwise reference the type outside the exchange instance itself.

TypeScript SDK

• sdks/typescript/pmxt/client.ts:352 — public escrow?: Escrow; (public, typed property on the base Exchange class).
• sdks/typescript/pmxt/client.ts:417 — this.escrow = new Escrow(this); (constructed for hosted-trading-allowlisted venues).
• sdks/typescript/pmxt/escrow.ts:113 — export class Escrow { ... } (the class itself, exported from its own module).
• sdks/typescript/index.ts — full file read; no export { Escrow } or export type { Escrow } anywhere, and no export * from "./pmxt/escrow.js". Every other file with a class/type referenced from a public property (ServerManager, FeedClient, Router) is re-exported here; escrow.ts is the one exception.

Python SDK

• sdks/python/pmxt/client.py:419 — self.escrow = Escrow(self) (same pattern as TypeScript).
• sdks/python/pmxt/escrow.py:86 — class Escrow: (the class itself).
• sdks/python/pmxt/__init__.py — grep -n "Escrow" sdks/python/pmxt/__init__.py returns zero matches. Escrow is absent from both the import list and __all__.

Evidence

Read sdks/typescript/index.ts in full (119 lines) — confirmed no reference to escrow.ts anywhere in the re-export surface, even though client.ts:352's public escrow?: Escrow field type-references it. Grepped sdks/python/pmxt/__init__.py for Escrow (case-sensitive) — zero hits, confirming the same omission in Python.

Impact

Neither SDK lets a consumer import Escrow by name. In TypeScript this means no way to write function handleEscrow(e: Escrow) { ... } or declare a typed variable without reaching into the package's internal file layout (import { Escrow } from 'pmxtjs/dist/pmxt/escrow.js', unsupported by the package's exports map). In Python, static type checkers and IDEs have no importable symbol for pmxt.Escrow, and isinstance(x, pmxt.Escrow) checks are impossible without a private import. This is the same "type referenced in a public field but not exported" pattern already tracked for the custom-signer types (issue #1919) and WsClientConfig (issue #2107), but for Escrow, which neither existing issue covers.

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Found by automated Core-to-SDK surface coverage audit