@node-lightning/graph/dist/serializers/lnd-serializer.js

Lightning Network P2P Graph

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.LndSerializer = void 0;
/**
 * Performs JSON serialization of the graph in the same format
 * as used by LND and defined in LND API documentation:
 *
 * https://api.lightning.community/#simple-rpc-33
 */
class LndSerializer {
    toObject(g) {
        return {
            nodes: Array.from(g.nodes.values()).map(node => this.serializeNode(node)),
            edges: Array.from(g.channels.values()).map(chan => this.serializeChannel(chan)),
        };
    }
    toJSON(g, format = true) {
        const obj = this.toObject(g);
        return format ? JSON.stringify(obj, null, 2) : JSON.stringify(obj);
    }
    serializeNode(node) {
        return {
            last_update: node.lastUpdate,
            pub_key: node.nodeId.toString("hex"),
            alias: node.aliasString,
            addresses: node.addresses.filter(p => p).map(address => this.serializeAddress(address)),
            color: node.rgbColorString,
        };
    }
    serializeAddress(address) {
        return {
            network: "tcp",
            addr: address.toString(),
        };
    }
    serializeChannel(chan) {
        return {
            channel_id: chan.shortChannelId.toNumber().toString(),
            chan_point: chan.channelPoint && chan.channelPoint.toString(),
            last_update: chan.lastUpdate,
            node1_pub: chan.nodeId1.toString("hex"),
            node2_pub: chan.nodeId2.toString("hex"),
            capacity: chan.capacity && chan.capacity.toString(),
            node1_policy: this.serializeRoutingPolicy(chan.node1Settings),
            node2_policy: this.serializeRoutingPolicy(chan.node2Settings),
        };
    }
    serializeRoutingPolicy(policy) {
        if (!policy)
            return null;
        return {
            time_lock_delta: policy.cltvExpiryDelta,
            min_htlc: policy.htlcMinimumMsat.toString(),
            fee_base_msat: policy.feeBaseMsat.toString(),
            fee_rate_milli_msat: policy.feeProportionalMillionths.toString(),
            disabled: policy.disabled,
            max_htlc_msat: policy.htlcMaximumMsat ? policy.htlcMaximumMsat.toString() : "0",
            last_update: policy.timestamp,
        };
    }
}
exports.LndSerializer = LndSerializer;
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