diff --git a/package.json b/package.json
index 4956270..0800306 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@crocswap-libs/sdk",
-  "version": "2.0.11",
+  "version": "2.0.12",
   "description": "🛠🐊🛠 An SDK for building applications on top of CrocSwap",
   "author": "Ben Wolski <ben@crocodilelabs.io>",
   "repository": "https://github.com/CrocSwap/sdk.git",
diff --git a/src/constants.ts b/src/constants.ts
index 12014ac..a9412bc 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -168,26 +168,6 @@ const SCROLL_SEPOLIA_CHAIN: ChainSpec = {
   displayName: "Scroll Sepolia",
 };
 
-const PLUME_SEPOLIA_CHAIN: ChainSpec = {
-  nodeUrl: "https://test-rpc.plumenetwork.xyz",
-  addrs: {
-    dex: "0x21B5E1aC7154A34d0ae38684A4c27CbE6b9c4f1E",
-    query: "0x1C74Dd2DF010657510715244DA10ba19D1F3D2B7",
-    impact: "0x70a6a0C905af5737aD73Ceba4e6158e995031d4B",
-  },
-  poolIndex: 36000,
-  isTestNet: true,
-  chainId: "0x18230",
-  gridSize: 1,
-  proxyPaths: {
-    cold: 3,
-    long: 130,
-    liq: 128
-  },
-  blockExplorer: "https://test-explorer.plumenetwork.xyz/",
-  displayName: "Plume Sepolia",
-};
-
 const SWELL_SEPOLIA_CHAIN: ChainSpec = {
   nodeUrl: "https://swell-testnet.alt.technology",
   addrs: {
@@ -249,7 +229,7 @@ const PLUME_LEGACY_CHAIN: ChainSpec = {
 };
 
 const PLUME_CHAIN: ChainSpec = {
-  nodeUrl: "https://phoenix-rpc.plumenetwork.xyz",
+  nodeUrl: "https://rpc.plume.org",
   addrs: {
     dex: "0xAaAaAAAA81a99d2a05eE428eC7a1d8A3C2237D85",
     query: "0x62223e90605845Cf5CC6DAE6E0de4CDA130d6DDf",
@@ -264,7 +244,7 @@ const PLUME_CHAIN: ChainSpec = {
     long: 130,
     liq: 128
   },
-  blockExplorer: "https://phoenix-explorer.plumenetwork.xyz/",
+  blockExplorer: "https://explorer.plume.org/",
   displayName: "Plume",
 };
 
@@ -342,7 +322,6 @@ export const CHAIN_SPECS: { [chainId: string]: ChainSpec } = {
   "0x82750": SCROLL_CHAIN,
   "0xa0c71fd": BLAST_SEPOLIA_CHAIN,
   "0x13e31": BLAST_CHAIN,
-  "0x18230": PLUME_SEPOLIA_CHAIN,
   "0x784": SWELL_SEPOLIA_CHAIN,
   "0x783": SWELL_CHAIN,
   "0x14a34": BASE_SEPOLIA_CHAIN,
@@ -357,7 +336,6 @@ export const CHAIN_SPECS: { [chainId: string]: ChainSpec } = {
   "scrollsepolia": SCROLL_SEPOLIA_CHAIN,
   "blast": BLAST_CHAIN,
   "blastSepolia": BLAST_SEPOLIA_CHAIN,
-  "plumeSepolia": PLUME_SEPOLIA_CHAIN,
   "swellSepolia": SWELL_SEPOLIA_CHAIN,
   "baseSepolia": BASE_SEPOLIA_CHAIN,
   "swell": SWELL_CHAIN,
diff --git a/src/swap.ts b/src/swap.ts
index 5ffd9b8..2c915a2 100644
--- a/src/swap.ts
+++ b/src/swap.ts
@@ -161,6 +161,9 @@ export class CrocSwapPlan {
       (this.baseToken.tokenAddr, this.quoteToken.tokenAddr, (await this.context).chain.poolIndex,
       this.sellBase, this.qtyInBase, await this.qty, TIP, limitPrice);
 
+    if ((impact[0] > 0 && impact[1] > 0) || (impact[0] < 0 && impact[1] < 0))
+      throw new Error("Invalid impact: base and quote flows have matching signs")
+
     const baseQty = this.baseToken.toDisplay(impact[0] < 0 ? -impact[0] : impact[0])
     const quoteQty = this.quoteToken.toDisplay(impact[1] < 0 ? -impact[1] : impact[1])
     const spotPrice = decodeCrocPrice(impact[2])