fix: allow passing of optimistic timestamp from outside

Author: doomsower

.gitignore

@@ -1,14 +1,21 @@
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+.DS_Store
+.env
 .history/
 .idea/
-node_modules/
-cache/
-build/
-typechain/
+.pnp.*
+.yarn/*
 artifacts/
-keys/*
+build/
+cache/
 coverage*
-.env
-.DS_Store
+keys/*
+node_modules/
+typechain/
 
 /.env.local
 /logs/*.json

src/config/env.ts

@@ -16,6 +16,7 @@ const envConfigMapping: Record<keyof ConfigSchema, string | string[]> = {
   minBalance: "MIN_BALANCE",
   oneInchApiKey: "ONE_INCH_API_KEY",
   optimistic: "OPTIMISTIC",
+  optimisticTimestamp: "OPTIMISTIC_TIMESTAMP",
   outDir: "OUT_DIR",
   outEndpoint: "OUT_ENDPOINT",
   outHeaders: "OUT_HEADERS",

src/config/schema.ts

@@ -70,6 +70,10 @@ export const ConfigSchema = z.object({
    * Enable optimistic liquidations
    */
   optimistic: booleanLike.pipe(z.boolean().optional()),
+  /**
+   * Optimistic timestamp to pass from external runner, in ms
+   */
+  optimisticTimestamp: z.number().int().positive().nullish(),
   /**
    * Override redstone gateways
    */

src/services/RedstoneServiceV3.ts

@@ -101,13 +101,17 @@ export class RedstoneServiceV3 {
       // Also, when forking anvil->anvil (when running on testnets) block.timestamp can be in future because min ts for block is 1 seconds,
       // and scripts can take dozens of blocks (hundreds for faucet). So we take min value;
       const nowMs = new Date().getTime();
-      const redstoneIntervalMs = 60_000;
-      const anvilTsMs =
-        redstoneIntervalMs *
-        Math.floor((Number(block.timestamp) * 1000) / redstoneIntervalMs);
-      const fromNowTsMs =
-        redstoneIntervalMs * Math.floor(nowMs / redstoneIntervalMs - 1);
-      this.#optimisticTimestamp = Math.min(anvilTsMs, fromNowTsMs);
+      if (this.config.optimisticTimestamp) {
+        this.#optimisticTimestamp = this.config.optimisticTimestamp;
+      } else {
+        const redstoneIntervalMs = 60_000;
+        const anvilTsMs =
+          redstoneIntervalMs *
+          Math.floor((Number(block.timestamp) * 1000) / redstoneIntervalMs);
+        const fromNowTsMs =
+          redstoneIntervalMs * Math.floor(nowMs / redstoneIntervalMs - 1);
+        this.#optimisticTimestamp = Math.min(anvilTsMs, fromNowTsMs);
+      }
       const deltaS = Math.floor((nowMs - this.#optimisticTimestamp) / 1000);
       this.logger.info(
         { tag: "timing" },