diff --git a/packages/wallet/core/src/signers/index.ts b/packages/wallet/core/src/signers/index.ts
index 80ccc07f1..2eb143703 100644
--- a/packages/wallet/core/src/signers/index.ts
+++ b/packages/wallet/core/src/signers/index.ts
@@ -20,7 +20,7 @@ export interface Signer {
 
 export interface SapientSigner {
   readonly address: MaybePromise<Address.Address>
-  readonly imageHash: MaybePromise<Hex.Hex | undefined>
+  readonly imageHash: MaybePromise<Hex.Hex>
 
   signSapient: (
     wallet: Address.Address,
diff --git a/packages/wallet/core/src/signers/session-manager.ts b/packages/wallet/core/src/signers/session-manager.ts
index 99d189131..e4cba16ec 100644
--- a/packages/wallet/core/src/signers/session-manager.ts
+++ b/packages/wallet/core/src/signers/session-manager.ts
@@ -50,15 +50,15 @@ export class SessionManager implements SapientSigner {
     this._provider = options.provider
   }
 
-  get imageHash(): Promise<Hex.Hex | undefined> {
+  get imageHash(): Promise<Hex.Hex> {
     return this.getImageHash()
   }
 
-  async getImageHash(): Promise<Hex.Hex | undefined> {
+  async getImageHash(): Promise<Hex.Hex> {
     const { configuration } = await this.wallet.getStatus()
     const sessionConfigLeaf = Config.findSignerLeaf(configuration, this.address)
     if (!sessionConfigLeaf || !Config.isSapientSignerLeaf(sessionConfigLeaf)) {
-      return undefined
+      throw new Error(`Session configuration not found for wallet ${this.wallet.address}`)
     }
     return sessionConfigLeaf.imageHash
   }
@@ -72,6 +72,10 @@ export class SessionManager implements SapientSigner {
     if (!imageHash) {
       throw new Error(`Session configuration not found for image hash ${imageHash}`)
     }
+    return this._getTopologyForImageHash(imageHash)
+  }
+
+  private async _getTopologyForImageHash(imageHash: Hex.Hex): Promise<SessionConfig.SessionsTopology> {
     const tree = await this.stateProvider.getTree(imageHash)
     if (!tree) {
       throw new Error(`Session configuration not found for image hash ${imageHash}`)
@@ -131,8 +135,21 @@ export class SessionManager implements SapientSigner {
   }
 
   async findSignersForCalls(wallet: Address.Address, chainId: number, calls: Payload.Call[]): Promise<SessionSigner[]> {
+    if (!Address.isEqual(this.wallet.address, wallet)) {
+      throw new Error('Wallet address mismatch')
+    }
     // Only use signers that match the topology
     const topology = await this.topology
+    return this._findSignersForCalls(wallet, chainId, calls, topology)
+  }
+
+  private async _findSignersForCalls(
+    wallet: Address.Address,
+    chainId: number,
+    calls: Payload.Call[],
+    topology: SessionConfig.SessionsTopology,
+  ): Promise<SessionSigner[]> {
+    // Only use signers that match the topology
     const identitySigners = SessionConfig.getIdentitySigners(topology)
     if (identitySigners.length === 0) {
       throw new Error('Identity signers not found')
@@ -173,11 +190,24 @@ export class SessionManager implements SapientSigner {
     wallet: Address.Address,
     chainId: number,
     calls: Payload.Call[],
+  ): Promise<Payload.Call | null> {
+    if (!Address.isEqual(wallet, this.wallet.address)) {
+      throw new Error('Wallet address mismatch')
+    }
+    const topology = await this.topology
+    return this._prepareIncrement(wallet, chainId, calls, topology)
+  }
+
+  private async _prepareIncrement(
+    wallet: Address.Address,
+    chainId: number,
+    calls: Payload.Call[],
+    topology: SessionConfig.SessionsTopology,
   ): Promise<Payload.Call | null> {
     if (calls.length === 0) {
       throw new Error('No calls provided')
     }
-    const signers = await this.findSignersForCalls(wallet, chainId, calls)
+    const signers = await this._findSignersForCalls(wallet, chainId, calls, topology)
 
     // Create a map of signers to their associated calls
     const signerToCalls = new Map<SessionSigner, Payload.Call[]>()
@@ -233,18 +263,18 @@ export class SessionManager implements SapientSigner {
     if (!Address.isEqual(wallet, this.wallet.address)) {
       throw new Error('Wallet address mismatch')
     }
+    if (this._provider) {
+      const providerChainId = await this._provider.request({
+        method: 'eth_chainId',
+      })
+      if (providerChainId !== Hex.fromNumber(chainId)) {
+        throw new Error(`Provider chain id mismatch, expected ${Hex.fromNumber(chainId)} but got ${providerChainId}`)
+      }
+    }
     if ((await this.imageHash) !== imageHash) {
       throw new Error('Unexpected image hash')
     }
-    //FIXME Test chain id
-    // if (this._provider) {
-    //   const providerChainId = await this._provider.request({
-    //     method: 'eth_chainId',
-    //   })
-    //   if (providerChainId !== Hex.fromNumber(chainId)) {
-    //     throw new Error(`Provider chain id mismatch, expected ${Hex.fromNumber(chainId)} but got ${providerChainId}`)
-    //   }
-    // }
+    const topology = await this._getTopologyForImageHash(imageHash)
     if (!Payload.isCalls(payload) || payload.calls.length === 0) {
       throw new Error('Only calls are supported')
     }
@@ -254,7 +284,7 @@ export class SessionManager implements SapientSigner {
       throw new Error(`Space ${payload.space} is too large`)
     }
 
-    const signers = await this.findSignersForCalls(wallet, chainId, payload.calls)
+    const signers = await this._findSignersForCalls(wallet, chainId, payload.calls, topology)
     if (signers.length !== payload.calls.length) {
       throw new Error('No signer supported for call')
     }
@@ -270,7 +300,7 @@ export class SessionManager implements SapientSigner {
     )
 
     // Check if the last call is an increment usage call
-    const expectedIncrement = await this.prepareIncrement(wallet, chainId, payload.calls)
+    const expectedIncrement = await this._prepareIncrement(wallet, chainId, payload.calls, topology)
     if (expectedIncrement) {
       let actualIncrement: Payload.Call
       if (
@@ -327,7 +357,7 @@ export class SessionManager implements SapientSigner {
     // Perform encoding
     const encodedSignature = SessionSignature.encodeSessionCallSignatures(
       signatures,
-      await this.topology,
+      topology,
       identitySigner,
       explicitSigners,
       implicitSigners,
@@ -346,23 +376,23 @@ export class SessionManager implements SapientSigner {
     payload: Payload.Parented,
     signature: SignatureTypes.SignatureOfSapientSignerLeaf,
   ): Promise<boolean> {
-    if (!Payload.isCalls(payload)) {
+    if (!Address.isEqual(wallet, this.wallet.address)) {
+      throw new Error('Wallet address mismatch')
+    }
+    if (!Payload.isCalls(payload) || payload.calls.length === 0) {
       // Only calls are supported
       return false
     }
-
     if (!this._provider) {
       throw new Error('Provider not set')
     }
-    //FIXME Test chain id
-    // const providerChainId = await this._provider.request({
-    //   method: 'eth_chainId',
-    // })
-    // if (providerChainId !== Hex.fromNumber(chainId)) {
-    //   throw new Error(
-    //     `Provider chain id mismatch, expected ${Hex.fromNumber(chainId)} but got ${providerChainId}`,
-    //   )
-    // }
+    // Test chain id
+    const providerChainId = await this._provider.request({
+      method: 'eth_chainId',
+    })
+    if (providerChainId !== Hex.fromNumber(chainId)) {
+      throw new Error(`Provider chain id mismatch, expected ${Hex.fromNumber(chainId)} but got ${providerChainId}`)
+    }
 
     const encodedPayload = Payload.encodeSapient(chainId, payload)
     const encodedCallData = AbiFunction.encodeData(Constants.RECOVER_SAPIENT_SIGNATURE, [
diff --git a/packages/wallet/core/src/wallet.ts b/packages/wallet/core/src/wallet.ts
index db4733e2b..fe5198d58 100644
--- a/packages/wallet/core/src/wallet.ts
+++ b/packages/wallet/core/src/wallet.ts
@@ -371,7 +371,6 @@ export class Wallet {
     // If the latest configuration does not match the onchain configuration
     // then we bundle the update into the transaction envelope
     if (!options?.noConfigUpdate) {
-      const status = await this.getStatus(provider)
       if (status.imageHash !== status.onChainImageHash) {
         calls.push({
           to: this.address,
@@ -402,7 +401,7 @@ export class Wallet {
         factory,
         factoryData,
       },
-      ...(await this.prepareBlankEnvelope(Number(chainId))),
+      ...(await this.prepareBlankEnvelope(Number(chainId), status.configuration)),
     }
   }
 
@@ -461,15 +460,15 @@ export class Wallet {
       }
     }
 
-    const [chainId, nonce] = await Promise.all([
+    const [chainId, nonce, status] = await Promise.all([
       provider.request({ method: 'eth_chainId' }),
       this.getNonce(provider, space),
+      this.getStatus(provider),
     ])
 
     // If the latest configuration does not match the onchain configuration
     // then we bundle the update into the transaction envelope
     if (!options?.noConfigUpdate) {
-      const status = await this.getStatus(provider)
       if (status.imageHash !== status.onChainImageHash) {
         calls.push({
           to: this.address,
@@ -490,7 +489,7 @@ export class Wallet {
         nonce,
         calls,
       },
-      ...(await this.prepareBlankEnvelope(Number(chainId))),
+      ...(await this.prepareBlankEnvelope(Number(chainId), status.configuration)),
     }
   }
 
@@ -597,13 +596,15 @@ export class Wallet {
     return encoded
   }
 
-  private async prepareBlankEnvelope(chainId: number) {
-    const status = await this.getStatus()
-
+  private async prepareBlankEnvelope(chainId: number, configuration?: Config.Config) {
+    if (!configuration) {
+      const status = await this.getStatus()
+      configuration = status.configuration
+    }
     return {
       wallet: this.address,
-      chainId: chainId,
-      configuration: status.configuration,
+      chainId,
+      configuration,
     }
   }
 }
diff --git a/packages/wallet/core/test/session-manager.test.ts b/packages/wallet/core/test/session-manager.test.ts
index aa154df91..cbbb26fba 100644
--- a/packages/wallet/core/test/session-manager.test.ts
+++ b/packages/wallet/core/test/session-manager.test.ts
@@ -503,7 +503,7 @@ for (const extension of ALL_EXTENSIONS) {
       'should fail to sign with an expired explicit session',
       async () => {
         const provider = Provider.from(RpcTransport.fromHttp(LOCAL_RPC_URL))
-        const chainId = 0
+        const chainId = Number(await provider.request({ method: 'eth_chainId' }))
 
         // Create unique identity and state provider for this test
         const identityPrivateKey = Secp256k1.randomPrivateKey()
@@ -561,7 +561,7 @@ for (const extension of ALL_EXTENSIONS) {
         }
 
         // Sign the transaction
-        expect(sessionManager.signSapient(wallet.address, chainId, payload, imageHash)).rejects.toThrow(
+        await expect(sessionManager.signSapient(wallet.address, chainId, payload, imageHash)).rejects.toThrow(
           'No signers match the topology',
         )
       },
diff --git a/packages/wallet/dapp-client/src/ChainSessionManager.ts b/packages/wallet/dapp-client/src/ChainSessionManager.ts
index 14fbdc329..cfa89469c 100644
--- a/packages/wallet/dapp-client/src/ChainSessionManager.ts
+++ b/packages/wallet/dapp-client/src/ChainSessionManager.ts
@@ -673,27 +673,22 @@ export class ChainSessionManager {
   ): Promise<void> {
     if (!this.provider || !this.wallet)
       throw new InitializationError('Manager core components not ready for explicit session.')
+    if (!this.sessionManager) throw new InitializationError('Main session manager is not initialized.')
+
+    const signerAddress = Address.fromPublicKey(Secp256k1.getPublicKey({ privateKey: pk }))
 
     const maxRetries = allowRetries ? 3 : 1
     let lastError: Error | null = null
 
     for (let attempt = 1; attempt <= maxRetries; attempt++) {
       try {
-        const tempManager = new Signers.SessionManager(this.wallet, {
-          sessionManagerAddress: Extensions.Rc3.sessions,
-          provider: this.provider,
-        })
-        const topology = await tempManager.getTopology()
+        const topology = await this.sessionManager.getTopology()
 
-        const signerAddress = Address.fromPublicKey(Secp256k1.getPublicKey({ privateKey: pk }))
         const permissions = SessionConfig.getSessionPermissions(topology, signerAddress)
-
         if (!permissions) {
           throw new InitializationError(`Permissions not found for session key.`)
         }
 
-        if (!this.sessionManager) throw new InitializationError('Main session manager is not initialized.')
-
         const explicitSigner = new Signers.Session.Explicit(pk, permissions)
         this.sessionManager = this.sessionManager.withExplicitSigner(explicitSigner)
 
@@ -711,9 +706,10 @@ export class ChainSessionManager {
         return
       } catch (err) {
         lastError = err instanceof Error ? err : new Error(String(err))
-        if (attempt < maxRetries) {
-          await new Promise((resolve) => setTimeout(resolve, 1000 * attempt))
-        }
+      }
+      if (attempt < maxRetries) {
+        console.error('Explicit session initialization failed, retrying...')
+        await new Promise((resolve) => setTimeout(resolve, 1000 * attempt))
       }
     }
     if (lastError)
@@ -755,13 +751,31 @@ export class ChainSessionManager {
     }
   }
 
+  /**
+   * Checks if the current session has a valid signer.
+   * @returns A promise that resolves to true if the session has a valid signer, false otherwise.
+   */
+  async hasValidSigner(): Promise<boolean> {
+    if (!this.wallet || !this.sessionManager || !this.provider || !this.isInitialized) {
+      return false
+    }
+
+    const signerValidity = await this.sessionManager.listSignerValidity(this.chainId)
+    if (signerValidity.some((s) => s.isValid)) {
+      return true
+    }
+    // SessionSignerInvalidReason available here
+    return false
+  }
+
   /**
    * Fetches fee options for a set of transactions.
+   * @param wallet The wallet address to use for the fee options.
    * @param calls The transactions to estimate fees for.
    * @returns A promise that resolves with an array of fee options.
    * @throws {FeeOptionError} If fetching fee options fails.
    */
-  async getFeeOptions(calls: Transaction[]): Promise<Relayer.FeeOption[]> {
+  async getFeeOptions(wallet: Address.Address, calls: Transaction[]): Promise<Relayer.FeeOption[]> {
     const callsToSend = calls.map((tx) => ({
       to: tx.to,
       value: tx.value,
@@ -772,8 +786,7 @@ export class ChainSessionManager {
       behaviorOnError: tx.behaviorOnError ?? ('revert' as const),
     }))
     try {
-      const signedCall = await this._buildAndSignCalls(callsToSend)
-      const feeOptions = await this.relayer.feeOptions(signedCall.to, this.chainId, callsToSend)
+      const feeOptions = await this.relayer.feeOptions(wallet, this.chainId, callsToSend)
       return feeOptions.options
     } catch (err) {
       throw new FeeOptionError(`Failed to get fee options: ${err instanceof Error ? err.message : String(err)}`)
@@ -948,9 +961,7 @@ export class ChainSessionManager {
         ...envelope.payload,
         parentWallets: [this.wallet.address],
       }
-      const imageHash = await this.sessionManager.imageHash
-      if (imageHash === undefined) throw new SessionConfigError('Session manager image hash is undefined')
-
+      const imageHash = await this.sessionManager.getImageHash()
       const signature = await this.sessionManager.signSapient(
         this.wallet.address,
         this.chainId,
diff --git a/packages/wallet/dapp-client/src/DappClient.ts b/packages/wallet/dapp-client/src/DappClient.ts
index dcc7d81ce..6253eaeb7 100644
--- a/packages/wallet/dapp-client/src/DappClient.ts
+++ b/packages/wallet/dapp-client/src/DappClient.ts
@@ -271,9 +271,11 @@ export class DappClient {
    * for previously established sessions.
    */
   private async _loadStateFromStorage(): Promise<void> {
-    const implicitSession = await this.sequenceStorage.getImplicitSession()
+    const [implicitSession, explicitSessions] = await Promise.all([
+      this.sequenceStorage.getImplicitSession(),
+      this.sequenceStorage.getExplicitSessions(),
+    ])
 
-    const explicitSessions = await this.sequenceStorage.getExplicitSessions()
     const chainIdsToInitialize = new Set([
       ...(implicitSession?.chainId !== undefined ? [implicitSession.chainId] : []),
       ...explicitSessions.map((s) => s.chainId),
@@ -551,11 +553,11 @@ export class DappClient {
    * }
    */
   async getFeeOptions(chainId: number, transactions: Transaction[]): Promise<Relayer.FeeOption[]> {
-    if (!this.isInitialized) throw new InitializationError('Not initialized')
+    if (!this.isInitialized || !this.walletAddress) throw new InitializationError('Not initialized')
     const chainSessionManager = this.getChainSessionManager(chainId)
     if (!chainSessionManager.isInitialized)
       throw new InitializationError(`ChainSessionManager for chain ${chainId} is not initialized.`)
-    return await chainSessionManager.getFeeOptions(transactions)
+    return await chainSessionManager.getFeeOptions(this.walletAddress, transactions)
   }
 
   /**
@@ -572,6 +574,19 @@ export class DappClient {
     return await chainSessionManager.hasPermission(transactions)
   }
 
+  /**
+   * Checks if the current session has a valid signer.
+   * @param chainId The chain ID on which to check the signer.
+   * @returns A promise that resolves to true if the session has a valid signer, otherwise false.
+   */
+  async hasValidSigner(chainId: number): Promise<boolean> {
+    const chainSessionManager = this.chainSessionManagers.get(chainId)
+    if (!chainSessionManager || !chainSessionManager.isInitialized) {
+      return false
+    }
+    return await chainSessionManager.hasValidSigner()
+  }
+
   /**
    * Signs and sends a transaction using an available session signer.
    * @param chainId The chain ID on which to send the transaction.
diff --git a/packages/wallet/wdk/test/sessions.test.ts b/packages/wallet/wdk/test/sessions.test.ts
index f6d8a144b..5e3a2592b 100644
--- a/packages/wallet/wdk/test/sessions.test.ts
+++ b/packages/wallet/wdk/test/sessions.test.ts
@@ -151,7 +151,7 @@ describe('Sessions (via Manager)', () => {
     }
     const signature = await dapp.sessionManager.signSapient(
       dapp.wallet.address,
-      chainId ?? 1n,
+      chainId,
       parentedEnvelope,
       sessionImageHash,
     )
@@ -255,7 +255,7 @@ describe('Sessions (via Manager)', () => {
         // Configure mock provider
         ;(provider as any).request.mockImplementation(({ method, params }) => {
           if (method === 'eth_chainId') {
-            return Promise.resolve(chainId.toString())
+            return Promise.resolve(Hex.fromNumber(chainId))
           }
           if (method === 'eth_call' && params[0].data === AbiFunction.encodeData(Constants.GET_IMPLEMENTATION)) {
             // Undeployed wallet
@@ -329,7 +329,7 @@ describe('Sessions (via Manager)', () => {
         // Configure mock provider
         ;(provider as any).request.mockImplementation(({ method, params }) => {
           if (method === 'eth_chainId') {
-            return Promise.resolve(chainId.toString())
+            return Promise.resolve(Hex.fromNumber(chainId))
           }
           if (method === 'eth_call' && params[0].data === AbiFunction.encodeData(Constants.GET_IMPLEMENTATION)) {
             // Undeployed wallet
@@ -404,7 +404,7 @@ describe('Sessions (via Manager)', () => {
         // Configure mock provider
         ;(provider as any).request.mockImplementation(({ method, params }) => {
           if (method === 'eth_chainId') {
-            return Promise.resolve(chainId.toString())
+            return Promise.resolve(Hex.fromNumber(chainId))
           }
           if (method === 'eth_call' && params[0].data === AbiFunction.encodeData(Constants.GET_IMPLEMENTATION)) {
             // Undeployed wallet
@@ -491,7 +491,7 @@ describe('Sessions (via Manager)', () => {
         // Configure mock provider
         ;(provider as any).request.mockImplementation(({ method, params }) => {
           if (method === 'eth_chainId') {
-            return Promise.resolve(chainId.toString())
+            return Promise.resolve(Hex.fromNumber(chainId))
           }
           if (method === 'eth_call' && params[0].data === AbiFunction.encodeData(Constants.GET_IMPLEMENTATION)) {
             // Undeployed wallet