From ff1e07783c13a1c1ad3831342041b855f49c93ee Mon Sep 17 00:00:00 2001
From: Zahary Karadjov <zahary@status.im>
Date: Mon, 12 Dec 2022 12:12:39 +0200
Subject: [PATCH] Local simulation suitable for capturing light client syncing
 data

---
 Makefile                        | 22 +++++++++++-----------
 beacon_chain/spec/crypto.nim    |  6 +++---
 beacon_chain/spec/digest.nim    |  2 +-
 scripts/launch_local_testnet.sh |  8 ++++++--
 4 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/Makefile b/Makefile
index 889e06603..769104547 100644
--- a/Makefile
+++ b/Makefile
@@ -201,20 +201,20 @@ local-testnet-minimal:
 	./scripts/launch_local_testnet.sh \
 		--data-dir $@ \
 		--preset minimal \
-		--nodes 4 \
-		--stop-at-epoch 6 \
+		--nodes 1 \
 		--disable-htop \
 		--enable-logtrace \
-		--base-port $$(( 6001 + EXECUTOR_NUMBER * 500 )) \
-		--base-rest-port $$(( 6031 + EXECUTOR_NUMBER * 500 )) \
-		--base-metrics-port $$(( 6061 + EXECUTOR_NUMBER * 500 )) \
-		--base-vc-metrics-port $$(( 6161 + EXECUTOR_NUMBER * 500 )) \
-		--base-remote-signer-port $$(( 6201 + EXECUTOR_NUMBER * 500 )) \
-		--base-el-net-port $$(( 6301 + EXECUTOR_NUMBER * 500 )) \
-		--base-el-http-port $$(( 6302 + EXECUTOR_NUMBER * 500 )) \
-		--base-el-ws-port $$(( 6303 + EXECUTOR_NUMBER * 500 )) \
-		--base-el-auth-rpc-port $$(( 6304 + EXECUTOR_NUMBER * 500 )) \
+		--base-port $$(( 8001 + EXECUTOR_NUMBER * 500 )) \
+		--base-rest-port $$(( 8031 + EXECUTOR_NUMBER * 500 )) \
+		--base-metrics-port $$(( 8061 + EXECUTOR_NUMBER * 500 )) \
+		--base-vc-metrics-port $$(( 8161 + EXECUTOR_NUMBER * 500 )) \
+		--base-remote-signer-port $$(( 8201 + EXECUTOR_NUMBER * 500 )) \
+		--base-el-net-port $$(( 8301 + EXECUTOR_NUMBER * 500 )) \
+		--base-el-http-port $$(( 8302 + EXECUTOR_NUMBER * 500 )) \
+		--base-el-ws-port $$(( 8303 + EXECUTOR_NUMBER * 500 )) \
+		--base-el-auth-rpc-port $$(( 8304 + EXECUTOR_NUMBER * 500 )) \
 		--el-port-offset 5 \
+		--disable-vc \
 		--timeout 648 \
 		--kill-old-processes \
 		$(TESTNET_EXTRA_FLAGS) \
diff --git a/beacon_chain/spec/crypto.nim b/beacon_chain/spec/crypto.nim
index c4afdc6fc..c935459bd 100644
--- a/beacon_chain/spec/crypto.nim
+++ b/beacon_chain/spec/crypto.nim
@@ -450,18 +450,18 @@ template fromSszBytes*(T: type[ValidatorPubKey | ValidatorSig], bytes: openArray
 func shortLog*(x: ValidatorPubKey | ValidatorSig): string =
   ## Logging for wrapped BLS types
   ## that may contain valid or non-validated data
-  byteutils.toHex(x.blob.toOpenArray(0, 3))
+  byteutils.toHex(x.blob)
 
 func shortLog*(x: CookedPubKey): string =
   let raw = x.toRaw()
-  byteutils.toHex(raw.toOpenArray(0, 3))
+  byteutils.toHex(raw)
 
 func shortLog*(x: ValidatorPrivKey): string =
   ## Logging for raw unwrapped BLS types
   "<private key>"
 
 func shortLog*(x: TrustedSig): string =
-  byteutils.toHex(x.data.toOpenArray(0, 3))
+  byteutils.toHex(x.data)
 
 # Initialization
 # ----------------------------------------------------------------------
diff --git a/beacon_chain/spec/digest.nim b/beacon_chain/spec/digest.nim
index 77f1c075c..df6b0a480 100644
--- a/beacon_chain/spec/digest.nim
+++ b/beacon_chain/spec/digest.nim
@@ -80,7 +80,7 @@ func `$`*(x: Eth2Digest): string =
   x.data.toHex()
 
 func shortLog*(x: Eth2Digest): string =
-  x.data.toOpenArray(0, 3).toHex()
+  x.data.toHex()
 
 chronicles.formatIt Eth2Digest:
   shortLog(it)
diff --git a/scripts/launch_local_testnet.sh b/scripts/launch_local_testnet.sh
index caa904b8e..8ffa5300c 100755
--- a/scripts/launch_local_testnet.sh
+++ b/scripts/launch_local_testnet.sh
@@ -357,7 +357,7 @@ SECRETS_DIR="${DATA_DIR}/secrets"
 scripts/makedir.sh "${SECRETS_DIR}"
 
 USER_VALIDATORS=8
-TOTAL_VALIDATORS=1024
+TOTAL_VALIDATORS=128
 
 # "Make" binary
 if [[ "${OS}" == "windows" ]]; then
@@ -821,7 +821,7 @@ dump_logtrace() {
   fi
 }
 
-NODES_WITH_VALIDATORS=${NODES_WITH_VALIDATORS:-4}
+NODES_WITH_VALIDATORS=${NODES_WITH_VALIDATORS:-1}
 BOOTSTRAP_NODE=0
 SYSTEM_VALIDATORS=$(( TOTAL_VALIDATORS - USER_VALIDATORS ))
 VALIDATORS_PER_NODE=$(( SYSTEM_VALIDATORS / NODES_WITH_VALIDATORS ))
@@ -993,6 +993,10 @@ for NUM_NODE in $(seq 0 $(( NUM_NODES - 1 ))); do
     --data-dir="${CONTAINER_NODE_DATA_DIR}" \
     ${BOOTSTRAP_ARG} \
     "${WEB3_ARG[@]}" \
+    --dump:on \
+    --light-client-data-serve=on \
+    --light-client-data-import-mode=full \
+    --light-client-data-max-periods=999999 \
     ${STOP_AT_EPOCH_FLAG} \
     ${KEYMANAGER_FLAG} \
     --keymanager-token-file="${DATA_DIR}/keymanager-token" \