pezkuwi-mobile-app/frontend/.metro-cache/cache/66/817f6061d685df1b9c7ff64b8974113f95e005732d3b88e8daa22a594241cc9acd081b

{"dependencies":[{"name":"rxjs","data":{"asyncType":null,"isESMImport":true,"locs":[{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":43,"index":43}}],"key":"PnOMrhZAPWoeW3ygrvUJ7ff768Y=","exportNames":["*"],"imports":1}},{"name":"../util/index.js","data":{"asyncType":null,"isESMImport":true,"locs":[{"start":{"line":2,"column":0,"index":44},"end":{"line":2,"column":40,"index":84}}],"key":"GRJlO1cmIj14nBxcasNpiq30og4=","exportNames":["*"],"imports":1}}],"output":[{"data":{"code":"__d(function (global, require, _$$_IMPORT_DEFAULT, _$$_IMPORT_ALL, module, exports, _dependencyMap) {\n  \"use strict\";\n\n  Object.defineProperty(exports, '__esModule', {\n    value: true\n  });\n  exports._getHeaderRange = _getHeaderRange;\n  exports.subscribeFinalizedHeads = subscribeFinalizedHeads;\n  var _rxjs = require(_dependencyMap[0], \"rxjs\");\n  var _utilIndexJs = require(_dependencyMap[1], \"../util/index.js\");\n  /**\n   * Returns a header range from startHash to to (not including) endHash, i.e. lastBlock.parentHash === endHash\n   */\n  function _getHeaderRange(instanceId, api) {\n    return (0, _utilIndexJs.memo)(instanceId, (startHash, endHash, prev = []) => api.rpc.chain.getHeader(startHash).pipe((0, _rxjs.switchMap)(header => header.parentHash.eq(endHash) ? (0, _rxjs.of)([header, ...prev]) : api.derive.chain._getHeaderRange(header.parentHash, endHash, [header, ...prev]))));\n  }\n  /**\n   * @name subscribeFinalizedHeads\n   * @description An observable of the finalized block headers. Unlike the base\n   * chain.subscribeFinalizedHeads this does not skip any headers. Since finalization\n   * may skip specific blocks (finalization happens in terms of chains), this version\n   * of the derive tracks missing headers (since last retrieved) and provides them\n   * to the caller.\n   * @example\n   * ```javascript\n   * const unsub = await api.derive.chain.subscribeFinalizedHeads((finalizedHead) => {\n   *   console.log(`${finalizedHead.hash}`);\n   * });\n   * ```\n   */\n  function subscribeFinalizedHeads(instanceId, api) {\n    return (0, _utilIndexJs.memo)(instanceId, () => {\n      let prevHash = null;\n      return api.rpc.chain.subscribeFinalizedHeads().pipe((0, _rxjs.switchMap)(header => {\n        const endHash = prevHash;\n        const startHash = header.parentHash;\n        prevHash = header.createdAtHash = header.hash;\n        return endHash === null || startHash.eq(endHash) ? (0, _rxjs.of)(header) : api.derive.chain._getHeaderRange(startHash, endHash, [header]).pipe((0, _rxjs.switchMap)(headers => (0, _rxjs.from)(headers)));\n      }));\n    });\n  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