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If it is determined to be in legacy mode, we will switch the\n // strategy that is used to handle the reply.\n if (!this._isLegacy && this._isLegacyReply(msg)) {\n this._isLegacy = true;\n this.logger.info('using legacy LND query_channel_range technique');\n }\n\n // handle the message according to which state the reply system is working\n if (this._isLegacy) {\n this._handleLegacyReply(msg);\n } else {\n this._handleReply(msg);\n }\n }\n\n /**\n * Resolves when the query has completed, otherwise it will reject on an\n * error.\n */\n public queryRange(\n firstBlock = 0,\n numBlocks = 4294967295 - firstBlock,\n ): Promise {\n // Construct a promise that will be resolved after all query logic has\n // succeeded or failed. This is a slightly different pattern in that\n // we use an private event emitter to signal completion or failure\n // asynchronously. We use those handlers to resolve the promise. As a\n // result, the external interface is very clean, but we can have\n // complicated internal operations\n return new Promise((resolve, reject) => {\n // transition the state to active\n this._state = ChannelRangeQueryState.Active;\n\n // send the query message and start the process\n this._sendQuery(firstBlock, numBlocks);\n\n // capture the promise methods so we can invoke them from\n // within our state machine.\n this._resolve = resolve;\n this._reject = reject;\n });\n }\n\n /**\n * Idempotent method that marks the state machine failed\n * @param error\n */\n private _transitionFailed(error: GossipError) {\n if (this._state !== ChannelRangeQueryState.Active) return;\n this._error = error;\n this._state = ChannelRangeQueryState.Failed;\n this._reject(error);\n }\n\n /**\n * Idempotent method that marks the state machine complete\n */\n private _transitionComplete() {\n if (this._state !== ChannelRangeQueryState.Active) return;\n this._state = ChannelRangeQueryState.Complete;\n this._resolve(this._results);\n }\n\n /**\n * Constructs and sends the query message the remote peer.\n * @param firstBlock\n * @param numBlocks\n */\n private _sendQuery(firstBlock: number, numBlocks: number) {\n this.logger.info(\n 'sending query_channel_range start_block=%d end_block=%d',\n firstBlock,\n firstBlock + numBlocks - 1,\n );\n\n // send message\n const msg = new QueryChannelRangeMessage();\n msg.chainHash = this.chainHash;\n msg.firstBlocknum = firstBlock;\n msg.numberOfBlocks = numBlocks;\n this.messageSender.sendMessage(msg);\n\n // capture the active query to check reply if it is a legacy reply\n this._query = msg;\n }\n\n /**\n * Check if this has the signature of a legacy reply. 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If a reply has\n * full_information=false, then the remote peer does not maintain a\n * up-to-date information for the supplied chain_hash.\n * @param msg\n */\n private _handleReply(msg: ReplyChannelRangeMessage) {\n this.logger.debug(\n 'received reply_channel_range - full_info=%d start_block=%d end_block=%d scid_count=%d',\n msg.fullInformation,\n msg.firstBlocknum,\n msg.firstBlocknum + msg.numberOfBlocks - 1,\n msg.shortChannelIds.length,\n );\n\n // enqueues any scids to be processed by a query_short_chan_id message\n if (msg.shortChannelIds.length) {\n this._results.push(...msg.shortChannelIds);\n }\n\n // The full_information flag should only return false when the remote peer\n // does not maintain up-to-date information for the request chain_hash\n if (!msg.fullInformation) {\n const error = new GossipError(\n GossipErrorCode.ReplyChannelRangeNoInformation,\n msg,\n );\n this._transitionFailed(error);\n return;\n }\n\n // We can finished when we have received a reply that covers the full range\n // of requested data. 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{ BufferReader, BufferWriter } from '@node-dlc/bufio';\nimport { BitField } from '@node-dlc/common';\n\nimport { QueryChannelRangeFlags } from '../flags/QueryChannelRangeFlags';\nimport { MessageType } from '../MessageType';\nimport { readTlvs } from '../serialize/readTlvs';\nimport { IWireMessage } from './IWireMessage';\n\nexport class QueryChannelRangeMessage implements IWireMessage {\n public static deserialize(payload: Buffer): QueryChannelRangeMessage {\n const instance = new QueryChannelRangeMessage();\n const reader = new BufferReader(payload);\n\n reader.readUInt16BE(); // read type bytes\n instance.chainHash = reader.readBytes(32);\n instance.firstBlocknum = reader.readUInt32BE();\n instance.numberOfBlocks = reader.readUInt32BE();\n\n // Parse any TLVs that might exist\n readTlvs(reader, (type: bigint, valueReader: BufferReader) => {\n switch (type) {\n case BigInt(1): {\n const options = valueReader.readBigSize();\n const bitfield = new BitField(options);\n 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The remote peer can accept the\n * channel using the accept_channel message.\n */\nexport class OpenChannelMessage implements IWireMessage {\n public static type = MessageType.OpenChannel;\n\n /**\n * Deserializes an open_channel message\n * @param buf\n */\n public static deserialize(buf: Buffer): OpenChannelMessage {\n const instance = new OpenChannelMessage();\n const reader = new BufferReader(buf);\n\n reader.readUInt16BE(); // read type\n instance.chainHash = reader.readBytes(32);\n instance.temporaryChannelId = reader.readBytes(32);\n instance.fundingSatoshis = Value.fromSats(reader.readUInt64BE());\n instance.pushMsat = Value.fromMilliSats(reader.readUInt64BE());\n instance.dustLimitSatoshis = Value.fromSats(reader.readUInt64BE());\n instance.maxHtlcValueInFlightMsat = Value.fromMilliSats(\n reader.readUInt64BE(),\n );\n instance.channelReserveSatoshis = Value.fromSats(reader.readUInt64BE());\n instance.htlcMinimumMsat = Value.fromMilliSats(reader.readUInt64BE());\n instance.feeRatePerKw = Value.fromSats(reader.readUInt32BE());\n instance.toSelfDelay = reader.readUInt16BE();\n instance.maxAcceptedHtlcs = reader.readUInt16BE();\n instance.fundingPubKey = reader.readBytes(33);\n instance.revocationBasePoint = reader.readBytes(33);\n instance.paymentBasePoint = reader.readBytes(33);\n instance.delayedPaymentBasePoint = reader.readBytes(33);\n instance.htlcBasePoint = reader.readBytes(33);\n instance.firstPerCommitmentPoint = reader.readBytes(33);\n instance.channelFlags = new BitField(\n BigInt(reader.readUInt8()),\n );\n\n // Parse the TLVs\n readTlvs(reader, (type: bigint, valueReader: BufferReader) => {\n switch (type) {\n case BigInt(0): {\n instance.upfrontShutdownScript = valueReader.readBytes();\n return true;\n }\n default:\n return false;\n }\n });\n\n return instance;\n }\n\n /**\n * The type for open_channel message. open_channel = 32\n */\n public type = OpenChannelMessage.type;\n\n /**\n * The chain_hash used to identifier the chain that the channel\n * should be opened on. Typically this value is the hash of the\n * genesis block in internal byte order.\n */\n public chainHash: Buffer;\n\n /**\n * A unique and temporary identifier used during the channel creation\n * process. This value is a placeholder for the channel_id that is\n * created from the funding transaction that can be used after the\n * funding_created message creates this transaction and the\n * counterparty uses the channel_id in the funding_signed message.\n */\n public temporaryChannelId: Buffer;\n\n /**\n * This value is the total value of the channel. It is value in\n * satoshis that will be locked into the 2-2 multisig output of the\n * funding transaction. This value must be less than 2^24 satoshis\n * unless option_large_channel is negotiated by both peers during\n * initialization.\n */\n public fundingSatoshis: Value;\n\n /**\n * This is the value in millisatoshi that is unconditionally pushed\n * to the counterparty of the channel. This value must be less than\n * 1000 * funding_satoshis. This value will be applied to the value\n * of the remote nodes commitment transaction output in the initial\n * commitment transaction.\n */\n public pushMsat: Value;\n\n /**\n * Indicates the value in satoshis under which outputs should not\n * be created for this node's commitment transaction or HTLC\n * transactions. This setting indicates the reality that small\n * transaction outputs are considered non-standard by the network and\n * will not be propagated.\n */\n public dustLimitSatoshis: Value;\n\n /**\n * Indicates the minimum amount that the counterparty is supposed to\n * keep as direct payment. This value must be equal or greater than\n * dust_limit_satoshis and SHOULD be 1% of the total value of the\n * channel. This value ensures that there is always value at stake\n * for a node to lose if it broadcasts an outdated commitment\n * transaction. 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This message can be sent by either node. The scriptPubKey must be a valid P2WPKH,\n * P2WSH, P2SH-P2WPKH, P2SH-P2WSH, or any valid witness script if option_shutdown_anysegwit is\n * negotiated and it should be same as `shutdown_scriptpubkey` value if it was sent during\n * `'open/accept' channel message`. Therefore, if both conditions hold true resulting transaction\n * will propagate to miners. If shutdown is sent by either node, corresponding node should send\n * commitment_signed to commit any outstanding changes before replying shutdown. Once shutdown is\n * sent by both nodes no new HTLCs should be added or accepted by the channel. 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After the initiator receives this message\n * the channel can be broadcast to the Bitcoin network as both\n * participants can spend the outputs of the funding transaction. This\n * message also is the first instance of the `channel_id` and both sides\n * can transition from using the `temporary_channel_id` to the actual\n * `channel_id`.\n */\nexport class FundingSignedMessage implements IWireMessage {\n public static type: MessageType = MessageType.FundingSigned;\n\n /**\n * Deserializes the funding_signed message\n * @param buf\n * @returns\n */\n public static deserialize(buf: Buffer): FundingSignedMessage {\n const instance = new FundingSignedMessage();\n const reader = new BufferReader(buf);\n\n reader.readUInt16BE(); // read type\n instance.channelId = new ChannelId(reader.readBytes(32));\n instance.signature = reader.readBytes(64);\n\n return instance;\n }\n\n /**\n * The type for message. funding_signed = 35\n */\n public readonly type: MessageType = FundingSignedMessage.type;\n\n /**\n * ChannelId generated from the funding transactions outpoint.\n */\n public channelId: ChannelId;\n\n /**\n * Signature for the counterpary's first commitment transaction.\n * This signature allows the counterparty to spend the commitment\n * using their own signature. The signature must be 64-bytes\n * representing the 32-byte (r,s) values for an ECDSA signature.\n */\n public signature: Buffer;\n\n /**\n * Serializes the message into a Buffer\n */\n public serialize(): Buffer {\n const writer = new BufferWriter();\n writer.writeUInt16BE(this.type);\n writer.writeBytes(this.channelId.toBuffer());\n writer.writeBytes(this.signature);\n return writer.toBuffer();\n }\n}\n"]},"_coverageSchema":"1a1c01bbd47fc00a2c39e90264f33305004495a9","hash":"ac78e3c679d2efd40bff5db7b0c0b9502a8ae0dd","contentHash":"89e190b698fdade12ae8c4c6f120280a231004db6db82ca30a6d066e6ee883ea"}}