Implements observer gateway with transaction query#23
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Issue: browsers sent OPTIONS preflight requests to /observer/notify-bridgeout and the proxy returned 405 Method Not Allowed, blocking cross-origin POST requests before they reached the observer forwarding logic. Fix: add explicit OPTIONS handling for the observer notify-bridgeout route, return the required CORS headers, keep POST responses immediate with accepted semantics, and add coverage for the preflight path.
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Replaces the single
coordinator_urlwith a list ofobserver_urlsto enhance robustness and decentralization of bridgeout notifications and transaction queries.This change:
POST /notify-bridgeoutrequests to all configured observer URLs in the background.GET /observer/transactionandGET /observer/transactionsroutes.txId,sender,page, andsinceTxTimestamp.sinceTxTimestampto ensure that only transactions after the specified timestamp are returned to the client.coordinator_gatewaymodule and its configuration.