diff --git a/package.json b/package.json
index 0779428d8c..0fd6f17bed 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/core-monorepo",
-  "version": "245.0.0",
+  "version": "247.0.0",
   "private": true,
   "description": "Monorepo for packages shared between MetaMask clients",
   "repository": {
diff --git a/packages/assets-controllers/CHANGELOG.md b/packages/assets-controllers/CHANGELOG.md
index 923f49ed9b..36747a51c2 100644
--- a/packages/assets-controllers/CHANGELOG.md
+++ b/packages/assets-controllers/CHANGELOG.md
@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [43.1.1]
+
+### Changed
+
+- Fix a bug in `TokensController.addTokens` where tokens could be added from the wrong chain. ([#4924](https://github.com/MetaMask/core/pull/4924))
+
+## [43.1.0]
+
+### Added
+
+- Add Solana to the polled exchange rates ([#4914](https://github.com/MetaMask/core/pull/4914))
+
 ## [43.0.0]
 
 ### Added
@@ -1204,7 +1216,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Use Ethers for AssetsContractController ([#845](https://github.com/MetaMask/core/pull/845))
 
-[Unreleased]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@43.0.0...HEAD
+[Unreleased]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@43.1.1...HEAD
+[43.1.1]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@43.1.0...@metamask/assets-controllers@43.1.1
+[43.1.0]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@43.0.0...@metamask/assets-controllers@43.1.0
 [43.0.0]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@42.0.0...@metamask/assets-controllers@43.0.0
 [42.0.0]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@41.0.0...@metamask/assets-controllers@42.0.0
 [41.0.0]: https://github.com/MetaMask/core/compare/@metamask/assets-controllers@40.0.0...@metamask/assets-controllers@41.0.0
diff --git a/packages/assets-controllers/package.json b/packages/assets-controllers/package.json
index 61b73e747d..d02bc4883d 100644
--- a/packages/assets-controllers/package.json
+++ b/packages/assets-controllers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/assets-controllers",
-  "version": "43.0.0",
+  "version": "43.1.1",
   "description": "Controllers which manage interactions involving ERC-20, ERC-721, and ERC-1155 tokens (including NFTs)",
   "keywords": [
     "MetaMask",
diff --git a/packages/assets-controllers/src/RatesController/RatesController.test.ts b/packages/assets-controllers/src/RatesController/RatesController.test.ts
index bf9d0fc193..f2fca24f76 100644
--- a/packages/assets-controllers/src/RatesController/RatesController.test.ts
+++ b/packages/assets-controllers/src/RatesController/RatesController.test.ts
@@ -100,8 +100,14 @@ describe('RatesController', () => {
       const { fiatCurrency, rates, cryptocurrencies } = ratesController.state;
       expect(ratesController).toBeDefined();
       expect(fiatCurrency).toBe('usd');
-      expect(Object.keys(rates)).toStrictEqual([Cryptocurrency.Btc]);
-      expect(cryptocurrencies).toStrictEqual([Cryptocurrency.Btc]);
+      expect(Object.keys(rates)).toStrictEqual([
+        Cryptocurrency.Btc,
+        Cryptocurrency.Solana,
+      ]);
+      expect(cryptocurrencies).toStrictEqual([
+        Cryptocurrency.Btc,
+        Cryptocurrency.Solana,
+      ]);
     });
   });
 
@@ -119,11 +125,16 @@ describe('RatesController', () => {
       const publishActionSpy = jest.spyOn(messenger, 'publish');
 
       jest.spyOn(global.Date, 'now').mockImplementation(() => getStubbedDate());
-      const mockRateValue = 57715.42;
+      const mockBtcRateValue = 57715.42;
+      const mockSolRateValue = 200.48;
+
       const fetchExchangeRateStub = jest.fn(() => {
         return Promise.resolve({
           btc: {
-            eur: mockRateValue,
+            eur: mockBtcRateValue,
+          },
+          sol: {
+            eur: mockSolRateValue,
           },
         });
       });
@@ -144,6 +155,10 @@ describe('RatesController', () => {
           conversionDate: 0,
           conversionRate: 0,
         },
+        sol: {
+          conversionDate: 0,
+          conversionRate: 0,
+        },
       });
 
       await ratesController.start();
@@ -163,7 +178,11 @@ describe('RatesController', () => {
       expect(ratesPosUpdate).toStrictEqual({
         btc: {
           conversionDate: MOCK_TIMESTAMP,
-          conversionRate: mockRateValue,
+          conversionRate: mockBtcRateValue,
+        },
+        sol: {
+          conversionDate: MOCK_TIMESTAMP,
+          conversionRate: mockSolRateValue,
         },
       });
 
@@ -326,7 +345,10 @@ describe('RatesController', () => {
 
       const cryptocurrencyListPreUpdate =
         ratesController.getCryptocurrencyList();
-      expect(cryptocurrencyListPreUpdate).toStrictEqual([Cryptocurrency.Btc]);
+      expect(cryptocurrencyListPreUpdate).toStrictEqual([
+        Cryptocurrency.Btc,
+        Cryptocurrency.Solana,
+      ]);
       // Just to make sure we're updating to something else than the default list
       expect(cryptocurrencyListPreUpdate).not.toStrictEqual(
         mockCryptocurrencyList,
diff --git a/packages/assets-controllers/src/RatesController/RatesController.ts b/packages/assets-controllers/src/RatesController/RatesController.ts
index 7abed73eed..16588ef0d0 100644
--- a/packages/assets-controllers/src/RatesController/RatesController.ts
+++ b/packages/assets-controllers/src/RatesController/RatesController.ts
@@ -12,8 +12,15 @@ import type {
 
 export const name = 'RatesController';
 
+/**
+ * Supported cryptocurrencies that can be used as a base currency. The value needs to be compatible
+ * with CryptoCompare's API which is the default source for the rates.
+ *
+ * See: https://min-api.cryptocompare.com/documentation?key=Price&cat=multipleSymbolsPriceEndpoint
+ */
 export enum Cryptocurrency {
   Btc = 'btc',
+  Solana = 'sol',
 }
 
 const DEFAULT_INTERVAL = 180000;
@@ -31,8 +38,12 @@ const defaultState = {
       conversionDate: 0,
       conversionRate: 0,
     },
+    [Cryptocurrency.Solana]: {
+      conversionDate: 0,
+      conversionRate: 0,
+    },
   },
-  cryptocurrencies: [Cryptocurrency.Btc],
+  cryptocurrencies: [Cryptocurrency.Btc, Cryptocurrency.Solana],
 };
 
 export class RatesController extends BaseController<
diff --git a/packages/assets-controllers/src/TokensController.ts b/packages/assets-controllers/src/TokensController.ts
index ba94bb2fb3..ddd7bd0295 100644
--- a/packages/assets-controllers/src/TokensController.ts
+++ b/packages/assets-controllers/src/TokensController.ts
@@ -462,16 +462,16 @@ export class TokensController extends BaseController<
    */
   async addTokens(tokensToImport: Token[], networkClientId?: NetworkClientId) {
     const releaseLock = await this.#mutex.acquire();
-    const { ignoredTokens, allDetectedTokens } = this.state;
+    const { allTokens, ignoredTokens, allDetectedTokens } = this.state;
     const importedTokensMap: { [key: string]: true } = {};
     // Used later to dedupe imported tokens
-    const newTokensMap = Object.values(tokensToImport).reduce(
-      (output, token) => {
-        output[token.address] = token;
-        return output;
-      },
-      {} as { [address: string]: Token },
-    );
+    const newTokensMap = [
+      ...(allTokens[this.#chainId]?.[this.#getSelectedAccount().address] || []),
+      ...tokensToImport,
+    ].reduce((output, token) => {
+      output[token.address] = token;
+      return output;
+    }, {} as { [address: string]: Token });
     try {
       tokensToImport.forEach((tokenToAdd) => {
         const { address, symbol, decimals, image, aggregators, name } =