Merge pull request #481 from opentensor/feat/localnet-fast-blocks

feat: localnet fast blocks

Author: distributedstatemachine

runtime/Cargo.toml

@@ -94,6 +94,7 @@ substrate-wasm-builder = { workspace = true, optional = true }
 [features]
 default = ["std"]
 pow-faucet = ["pallet-subtensor/pow-faucet"]
+fast-blocks = []
 std = [
 	"frame-try-runtime?/std",
 	"frame-system-benchmarking?/std",

runtime/src/lib.rs

@@ -148,8 +148,13 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 /// up by `pallet_aura` to implement `fn slot_duration()`.
 ///
 /// Change this to adjust the block time.
+#[cfg(not(feature = "fast-blocks"))]
 pub const MILLISECS_PER_BLOCK: u64 = 12000;
 
+/// Fast blocks for development
+#[cfg(feature = "fast-blocks")]
+pub const MILLISECS_PER_BLOCK: u64 = 250;
+
 // NOTE: Currently it is not possible to change the slot duration after the chain has started.
 //       Attempting to do so will brick block production.
 pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;

scripts/localnet.sh

@@ -8,11 +8,15 @@ BASE_DIR="$SCRIPT_DIR/.."
 
 : "${CHAIN:=local}"
 : "${BUILD_BINARY:=1}"
-: "${FEATURES:=pow-faucet}"
+: "${FEATURES:="pow-faucet fast-blocks"}"
 
 SPEC_PATH="${SCRIPT_DIR}/specs/"
 FULL_PATH="$SPEC_PATH$CHAIN.json"
 
+# Kill any existing nodes which may have not exited correctly after a previous
+# run.
+pkill -9 'node-subtensor'
+
 if [ ! -d "$SPEC_PATH" ]; then
   echo "*** Creating directory ${SPEC_PATH}..."
   mkdir $SPEC_PATH
@@ -59,8 +63,10 @@ bob_start=(
   --discover-local
 )
 
+trap 'pkill -P $$' EXIT SIGINT SIGTERM
+
 (
-  trap 'kill 0' SIGINT
   ("${alice_start[@]}" 2>&1) &
   ("${bob_start[@]}" 2>&1)
+  wait
 )