fix: account for traveling into future on testnets

src/services/RedstoneServiceV3.ts

@@ -71,13 +71,25 @@ export class RedstoneServiceV3 {
     this.liquidationPreviewUpdates = this.liquidationPreviewUpdates.bind(this);
 
     if (this.config.optimistic) {
+      const block = await this.client.pub.getBlock({
+        blockNumber: this.client.anvilForkBlock,
+      });
+      if (!block) {
+        throw new Error(`cannot get latest block`);
+      }
       // https://github.com/redstone-finance/redstone-oracles-monorepo/blob/c7569a8eb7da1d3ad6209dfcf59c7ca508ea947b/packages/sdk/src/request-data-packages.ts#L82
       // we round the timestamp to full minutes for being compatible with
       // oracle-nodes, which usually work with rounded 10s and 60s intervals
-      this.#optimisticTimestamp =
-        60_000 * Math.floor(new Date().getTime() / 60_000);
+      //
+      // 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 now = new Date().getTime();
+      const anvilTs = 10 * Math.floor(Number(block.timestamp) / 10) * 1000;
+      const fromNowTs = 60_000 * Math.floor(now / 60_000 - 60_000);
+      this.#optimisticTimestamp = Math.min(anvilTs, fromNowTs);
+      const delta = Math.ceil((now - this.#optimisticTimestamp) / 1000);
       this.log.info(
-        `will use optimistic timestamp: ${this.#optimisticTimestamp}`,
+        `will use optimistic timestamp: ${this.#optimisticTimestamp} (delta: ${delta}s)`,
       );
     }
   }