Add radius cli option to Fluffy and use it in local testnet script (#968)

fluffy/conf.nim

@@ -141,6 +141,13 @@ type
       desc: "URI of eth client where to proxy unimplemented rpc methods to"
       name: "proxy-uri" .}: ClientConfig
 
+    logRadius* {.
+      desc: "Hardcoded (logarithmic) radius for each Portal network. This is " &
+            "a temporary development option which will be replaced in the " &
+            "future by e.g. a storage size limit"
+      defaultValue: 256
+      name: "radius" .}: uint16
+
     tableIpLimit* {.
       hidden
       desc: "Maximum amount of nodes with the same IP in the routing tables"

fluffy/fluffy.nim

@@ -22,6 +22,11 @@ import
   ./network/wire/[portal_stream, portal_protocol_config],
   "."/[content_db, populate_db]
 
+proc fromLogRadius(T: type UInt256, logRadius: uint16): T =
+  # Get the max value of the logRadius range
+  pow((2).stuint(256), logRadius) - 1
+  # For the min value do `pow((2).stuint(256), logRadius - 1)`
+
 proc initializeBridgeClient(maybeUri: Option[string]): Option[BridgeClient] =
   try:
     if (maybeUri.isSome()):
@@ -72,14 +77,15 @@ proc run(config: PortalConf) {.raises: [CatchableError, Defect].} =
   # This is done because the content in the db is dependant on the `NodeId` and
   # the selected `Radius`.
   let
+    radius = UInt256.fromLogRadius(config.logRadius)
     db = ContentDB.new(config.dataDir / "db" / "contentdb_" &
       d.localNode.id.toByteArrayBE().toOpenArray(0, 8).toHex())
 
     portalConfig = PortalProtocolConfig.init(
       config.tableIpLimit, config.bucketIpLimit, config.bitsPerHop)
-    stateNetwork = StateNetwork.new(d, db,
+    stateNetwork = StateNetwork.new(d, db, radius,
       bootstrapRecords = bootstrapRecords, portalConfig = portalConfig)
-    historyNetwork = HistoryNetwork.new(d, db,
+    historyNetwork = HistoryNetwork.new(d, db, radius,
       bootstrapRecords = bootstrapRecords, portalConfig = portalConfig)
 
   # One instance of UtpDiscv5Protocol is shared over all the PortalStreams.

fluffy/scripts/launch_local_testnet.sh

@@ -246,6 +246,9 @@ for NUM_NODE in $(seq 0 $(( NUM_NODES - 1 ))); do
 
   if [[ ${NUM_NODE} != ${BOOTSTRAP_NODE} ]]; then
     BOOTSTRAP_ARG="--bootstrap-file=${BOOTSTRAP_ENR_FILE}"
+    # All nodes but bootstrap node run with log. radius of 254 which should
+    # result in ~1/4th of the data set stored.
+    RADIUS_ARG="--radius=254"
 
     # Wait for the bootstrap node to write out its enr file
     START_TIMESTAMP=$(date +%s)
@@ -279,6 +282,7 @@ for NUM_NODE in $(seq 0 $(( NUM_NODES - 1 ))); do
     --table-ip-limit=1024 \
     --bucket-ip-limit=24 \
     --bits-per-hop=1 \
+    ${RADIUS_ARG} \
     ${EXTRA_ARGS} \
     > "${DATA_DIR}/log${NUM_NODE}.txt" 2>&1 &