diff --git a/apps/iframe/src/components/interface/GlobalHeader.tsx b/apps/iframe/src/components/interface/GlobalHeader.tsx
index 3051cb8984..5489f5dfdf 100644
--- a/apps/iframe/src/components/interface/GlobalHeader.tsx
+++ b/apps/iframe/src/components/interface/GlobalHeader.tsx
@@ -4,7 +4,7 @@ import { GearSix } from "@phosphor-icons/react/dist/ssr"
 import { Link, useLocation } from "@tanstack/react-router"
 import { useAtom } from "jotai"
 import { appMessageBus } from "#src/services/eventBus"
-import { secondaryMenuVisibilityAtom } from "#src/state/interfaceState.ts"
+import { secondaryMenuVisibilityAtom } from "#src/state/interfaceState"
 
 function signalClosed() {
     void appMessageBus.emit(Msgs.WalletVisibility, { isOpen: false })
diff --git a/apps/iframe/src/components/interface/banners/BannerList.tsx b/apps/iframe/src/components/interface/banners/BannerList.tsx
index 8d30921157..fb4ed7c23b 100644
--- a/apps/iframe/src/components/interface/banners/BannerList.tsx
+++ b/apps/iframe/src/components/interface/banners/BannerList.tsx
@@ -1,5 +1,5 @@
 import { useAtom } from "jotai"
-import { bannersAtom } from "#src/state/banner.ts"
+import { bannersAtom } from "#src/state/banner"
 import { PopupBlockedAlert } from "./alerts/PopupBlockedAlert"
 
 function useBanners() {
diff --git a/apps/iframe/src/components/interface/home/AppStatus.tsx b/apps/iframe/src/components/interface/home/AppStatus.tsx
index 3e790fbace..d07a10e2d9 100644
--- a/apps/iframe/src/components/interface/home/AppStatus.tsx
+++ b/apps/iframe/src/components/interface/home/AppStatus.tsx
@@ -1,7 +1,7 @@
 import { Link } from "@tanstack/react-router"
 import { useAtomValue } from "jotai"
 import { useHasPermissions } from "#src/hooks/useHasPermissions"
-import { currentChainAtom } from "#src/state/chains.ts"
+import { currentChainAtom } from "#src/state/chains"
 import { getAppURL } from "#src/utils/appURL"
 
 export const AppStatus = () => {
diff --git a/apps/iframe/src/components/interface/home/HappyBalance.tsx b/apps/iframe/src/components/interface/home/HappyBalance.tsx
index 41fcd3c658..45b80e0e6e 100644
--- a/apps/iframe/src/components/interface/home/HappyBalance.tsx
+++ b/apps/iframe/src/components/interface/home/HappyBalance.tsx
@@ -1,7 +1,7 @@
 import { useAtom, useAtomValue } from "jotai"
 import { useEffect } from "react"
 import { useBalance } from "wagmi"
-import { walletOpenSignalAtom } from "#src/state/interfaceState.ts"
+import { walletOpenSignalAtom } from "#src/state/interfaceState"
 import { userAtom } from "#src/state/user"
 import { formatUserBalance } from "#src/utils/formatUserBalance"
 
diff --git a/apps/iframe/src/components/interface/home/tabs/views/GamesView.tsx b/apps/iframe/src/components/interface/home/tabs/views/GamesView.tsx
index 54c60af1be..84ff3131cb 100644
--- a/apps/iframe/src/components/interface/home/tabs/views/GamesView.tsx
+++ b/apps/iframe/src/components/interface/home/tabs/views/GamesView.tsx
@@ -1,4 +1,4 @@
-import { appList } from "#src/utils/lists.ts"
+import { appList } from "#src/utils/lists"
 
 /** Displays recently played games that the user logged into. */
 const GamesView = () => {
diff --git a/apps/iframe/src/components/interface/home/tabs/views/tokens/ImportTokensDialog.tsx b/apps/iframe/src/components/interface/home/tabs/views/tokens/ImportTokensDialog.tsx
index 328f499331..5ae1b1c579 100644
--- a/apps/iframe/src/components/interface/home/tabs/views/tokens/ImportTokensDialog.tsx
+++ b/apps/iframe/src/components/interface/home/tabs/views/tokens/ImportTokensDialog.tsx
@@ -8,7 +8,7 @@ import { useWatchAsset } from "wagmi"
 import { Button } from "#src/components/primitives/button/Button"
 import { FieldInput } from "#src/components/primitives/input/FieldInput"
 import { Input } from "#src/components/primitives/input/Input"
-import { recipeTextInput } from "#src/components/primitives/input/variants.ts"
+import { recipeTextInput } from "#src/components/primitives/input/variants"
 import { recipePositioner } from "#src/components/primitives/popover/variants"
 import { useERC20Balance } from "#src/hooks/useERC20Balance"
 import { importTokensDialogVisibilityAtom } from "#src/state/interfaceState"
diff --git a/apps/iframe/src/components/interface/permissions/SessionKeyCheckbox.tsx b/apps/iframe/src/components/interface/permissions/SessionKeyCheckbox.tsx
index 906a7230e6..97d0df51bf 100644
--- a/apps/iframe/src/components/interface/permissions/SessionKeyCheckbox.tsx
+++ b/apps/iframe/src/components/interface/permissions/SessionKeyCheckbox.tsx
@@ -3,7 +3,7 @@ import { Check } from "@phosphor-icons/react"
 import { useState } from "react"
 import type { Address } from "viem"
 import { Permissions } from "#src/constants/permissions"
-import { type SessionKeyRequest, hasPermissions } from "#src/state/permissions.ts"
+import { type SessionKeyRequest, hasPermissions } from "#src/state/permissions"
 import type { AppURL } from "#src/utils/appURL"
 
 interface SessionKeyContractProps {
diff --git a/apps/iframe/src/components/requests/WalletRequestPermissions.tsx b/apps/iframe/src/components/requests/WalletRequestPermissions.tsx
index 6f49b09bd5..3312723111 100644
--- a/apps/iframe/src/components/requests/WalletRequestPermissions.tsx
+++ b/apps/iframe/src/components/requests/WalletRequestPermissions.tsx
@@ -1,5 +1,5 @@
 import { EthRequestAccounts } from "#src/components/requests/EthRequestAccounts"
-import { type PermissionDescriptionIndex, permissionDescriptions } from "#src/constants/requestLabels.ts"
+import { type PermissionDescriptionIndex, permissionDescriptions } from "#src/constants/requestLabels"
 import { getAppURL } from "#src/utils/appURL"
 import {
     FormattedDetailsLine,
diff --git a/apps/iframe/src/connections/GoogleConnector.ts b/apps/iframe/src/connections/GoogleConnector.ts
index 2f7dff3e54..6cc32bb61a 100644
--- a/apps/iframe/src/connections/GoogleConnector.ts
+++ b/apps/iframe/src/connections/GoogleConnector.ts
@@ -1,11 +1,11 @@
 import { type HappyUser, WalletType } from "@happy.tech/wallet-common"
 import { type AuthProvider, GoogleAuthProvider } from "firebase/auth"
 import type { EIP1193Provider } from "viem"
-import { setUserWithProvider } from "#src/actions/setUserWithProvider.ts"
-import { StorageKey, storage } from "#src/services/storage.ts"
-import { getChains } from "#src/state/chains.ts"
-import { grantPermissions } from "#src/state/permissions.ts"
-import { getAppURL } from "#src/utils/appURL.ts"
+import { setUserWithProvider } from "#src/actions/setUserWithProvider"
+import { StorageKey, storage } from "#src/services/storage"
+import { getChains } from "#src/state/chains"
+import { grantPermissions } from "#src/state/permissions"
+import { getAppURL } from "#src/utils/appURL"
 import { FirebaseConnector } from "./firebase"
 import { googleLogo } from "./firebase/logos"
 
diff --git a/apps/iframe/src/connections/InjectedProviderProxy.ts b/apps/iframe/src/connections/InjectedProviderProxy.ts
index 94bfc8c101..da1526034b 100644
--- a/apps/iframe/src/connections/InjectedProviderProxy.ts
+++ b/apps/iframe/src/connections/InjectedProviderProxy.ts
@@ -10,14 +10,14 @@ import {
     standardizeRpcError,
 } from "@happy.tech/wallet-common"
 import type { EIP1193Provider } from "viem"
-import { setUserWithProvider } from "#src/actions/setUserWithProvider.ts"
-import { happyProviderBus } from "#src/services/eventBus.ts"
-import { getInjectedProvider } from "#src/state/injectedProvider.ts"
-import { grantPermissions } from "#src/state/permissions.ts"
-import { getUser } from "#src/state/user.ts"
-import { getAppURL, isStandaloneWallet, walletID } from "#src/utils/appURL.ts"
-import { createHappyUserFromWallet } from "#src/utils/createHappyUserFromWallet.ts"
-import { iframeProvider } from "#src/wagmi/provider.ts"
+import { setUserWithProvider } from "#src/actions/setUserWithProvider"
+import { happyProviderBus } from "#src/services/eventBus"
+import { getInjectedProvider } from "#src/state/injectedProvider"
+import { grantPermissions } from "#src/state/permissions"
+import { getUser } from "#src/state/user"
+import { getAppURL, isStandaloneWallet, walletID } from "#src/utils/appURL"
+import { createHappyUserFromWallet } from "#src/utils/createHappyUserFromWallet"
+import { iframeProvider } from "#src/wagmi/provider"
 
 /**
  * A proxy implementation of the EIP-1193 provider interface
diff --git a/apps/iframe/src/connections/initialize.ts b/apps/iframe/src/connections/initialize.ts
index 4628aff241..6ec1440519 100644
--- a/apps/iframe/src/connections/initialize.ts
+++ b/apps/iframe/src/connections/initialize.ts
@@ -3,8 +3,8 @@ import { type ConnectionProvider, type EIP6963ProviderDetail, Msgs } from "@happ
 import { atom, getDefaultStore, useAtomValue } from "jotai"
 import { createStore } from "mipd"
 import { useMemo } from "react"
-import { appMessageBus } from "#src/services/eventBus.ts"
-import { isStandaloneWallet } from "#src/utils/appURL.ts"
+import { appMessageBus } from "#src/services/eventBus"
+import { isStandaloneWallet } from "#src/utils/appURL"
 import { userAtom } from "../state/user"
 import { GoogleConnector } from "./GoogleConnector"
 import { InjectedConnector } from "./InjectedConnector"
diff --git a/apps/iframe/src/listeners/atoms.ts b/apps/iframe/src/listeners/atoms.ts
index 4001fe8cac..0f5743fdbc 100644
--- a/apps/iframe/src/listeners/atoms.ts
+++ b/apps/iframe/src/listeners/atoms.ts
@@ -2,7 +2,7 @@ import { Msgs } from "@happy.tech/wallet-common"
 import { getDefaultStore } from "jotai/vanilla"
 import { http, createPublicClient } from "viem"
 import { mainnet } from "viem/chains"
-import { permissionsMapAtom } from "#src/state/permissions.ts"
+import { permissionsMapAtom } from "#src/state/permissions"
 import { appMessageBus } from "../services/eventBus"
 import { authStateAtom } from "../state/authState"
 import { userAtom } from "../state/user"
diff --git a/apps/iframe/src/listeners/overlay.ts b/apps/iframe/src/listeners/overlay.ts
index b826ddf6df..4896a799f1 100644
--- a/apps/iframe/src/listeners/overlay.ts
+++ b/apps/iframe/src/listeners/overlay.ts
@@ -1,5 +1,5 @@
 import { Msgs } from "@happy.tech/wallet-common"
-import { appMessageBus } from "#src/services/eventBus.ts"
+import { appMessageBus } from "#src/services/eventBus"
 
 /**
  * Forward error display requests to the front
diff --git a/apps/iframe/src/requests/handlers/rejected.ts b/apps/iframe/src/requests/handlers/rejected.ts
index 27e02ca7b0..4a129a4b75 100644
--- a/apps/iframe/src/requests/handlers/rejected.ts
+++ b/apps/iframe/src/requests/handlers/rejected.ts
@@ -5,9 +5,9 @@ import {
     WalletType,
     serializeRpcError,
 } from "@happy.tech/wallet-common"
-import { InjectedProviderProxy } from "#src/connections/InjectedProviderProxy.ts"
+import { InjectedProviderProxy } from "#src/connections/InjectedProviderProxy"
 import { happyProviderBus } from "#src/services/eventBus"
-import { getUser } from "#src/state/user.ts"
+import { getUser } from "#src/state/user"
 import { appForSourceID, isWallet } from "#src/utils/appURL"
 import { iframeProvider } from "#src/wagmi/provider"
 
diff --git a/apps/iframe/src/requests/tests/eth_requestAccounts.cross_origin.spec.ts b/apps/iframe/src/requests/tests/eth_requestAccounts.cross_origin.spec.ts
index 51209794de..983c016cb0 100644
--- a/apps/iframe/src/requests/tests/eth_requestAccounts.cross_origin.spec.ts
+++ b/apps/iframe/src/requests/tests/eth_requestAccounts.cross_origin.spec.ts
@@ -4,7 +4,7 @@ import type { HappyUser } from "@happy.tech/wallet-common"
 import { beforeEach, describe, expect, test, vi } from "vitest"
 import { dispatchedPermissionlessRequest } from "#src/requests/handlers/permissionless"
 import { setAuthState } from "#src/state/authState"
-import { clearPermissions, getAllPermissions, grantPermissions } from "#src/state/permissions.ts"
+import { clearPermissions, getAllPermissions, grantPermissions } from "#src/state/permissions"
 import { setUser } from "#src/state/user"
 
 const { appURL, parentID, appURLMock } = await vi //
diff --git a/apps/iframe/src/requests/tests/eth_requestAccounts.same_origin.spec.ts b/apps/iframe/src/requests/tests/eth_requestAccounts.same_origin.spec.ts
index 895d5917ec..92f48cd1d6 100644
--- a/apps/iframe/src/requests/tests/eth_requestAccounts.same_origin.spec.ts
+++ b/apps/iframe/src/requests/tests/eth_requestAccounts.same_origin.spec.ts
@@ -4,7 +4,7 @@ import type { HappyUser } from "@happy.tech/wallet-common"
 import { beforeEach, describe, expect, test } from "vitest"
 import { vi } from "vitest"
 import { setAuthState } from "#src/state/authState"
-import { clearPermissions, getAllPermissions } from "#src/state/permissions.ts"
+import { clearPermissions, getAllPermissions } from "#src/state/permissions"
 import { setUser } from "#src/state/user"
 import { dispatchedPermissionlessRequest } from "../handlers/permissionless"
 
diff --git a/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.cross_origin.spec.ts b/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.cross_origin.spec.ts
index bc31d628fe..d6e05ac105 100644
--- a/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.cross_origin.spec.ts
+++ b/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.cross_origin.spec.ts
@@ -4,7 +4,7 @@ import type { HappyUser } from "@happy.tech/wallet-common"
 import { beforeEach, describe, expect, test, vi } from "vitest"
 import { dispatchedPermissionlessRequest } from "#src/requests/handlers/permissionless"
 import { setAuthState } from "#src/state/authState"
-import { clearPermissions, getAllPermissions } from "#src/state/permissions.ts"
+import { clearPermissions, getAllPermissions } from "#src/state/permissions"
 import { setUser } from "#src/state/user"
 
 const { appURL, parentID, appURLMock } = await vi //
diff --git a/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.same_origin.spec.ts b/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.same_origin.spec.ts
index eb54ea00d7..a820058738 100644
--- a/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.same_origin.spec.ts
+++ b/apps/iframe/src/requests/tests/wallet_requestPermissions.no_conf.same_origin.spec.ts
@@ -5,7 +5,7 @@ import { beforeEach, describe, expect, test } from "vitest"
 import { vi } from "vitest"
 import { dispatchedPermissionlessRequest } from "#src/requests/handlers/permissionless"
 import { setAuthState } from "#src/state/authState"
-import { clearPermissions, getAllPermissions } from "#src/state/permissions.ts"
+import { clearPermissions, getAllPermissions } from "#src/state/permissions"
 import { setUser } from "#src/state/user"
 
 const { appURL, walletID, appURLMock } = await vi //
diff --git a/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.cross_origin.spec.ts b/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.cross_origin.spec.ts
index 77aaff2863..c220a4d126 100644
--- a/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.cross_origin.spec.ts
+++ b/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.cross_origin.spec.ts
@@ -4,7 +4,7 @@ import type { HappyUser } from "@happy.tech/wallet-common"
 import { beforeEach, describe, expect, test, vi } from "vitest"
 import { dispatchApprovedRequest } from "#src/requests/handlers/approved"
 import { setAuthState } from "#src/state/authState"
-import { clearPermissions, getAllPermissions } from "#src/state/permissions.ts"
+import { clearPermissions, getAllPermissions } from "#src/state/permissions"
 import { setUser } from "#src/state/user"
 
 const { appURL, walletURL, parentID, appURLMock } = await vi //
diff --git a/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.same_origin.spec.ts b/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.same_origin.spec.ts
index 56ff9f85cd..b147527c5c 100644
--- a/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.same_origin.spec.ts
+++ b/apps/iframe/src/requests/tests/wallet_requestPermissions.user_conf.same_origin.spec.ts
@@ -5,7 +5,7 @@ import { beforeEach, describe, expect, test } from "vitest"
 import { vi } from "vitest"
 import { dispatchApprovedRequest } from "#src/requests/handlers/approved"
 import { setAuthState } from "#src/state/authState"
-import { clearPermissions, getAllPermissions } from "#src/state/permissions.ts"
+import { clearPermissions, getAllPermissions } from "#src/state/permissions"
 import { setUser } from "#src/state/user"
 
 const { appURL, walletID, appURLMock } = await vi //
diff --git a/apps/iframe/src/requests/tests/wallet_watchAsset.spec.ts b/apps/iframe/src/requests/tests/wallet_watchAsset.spec.ts
index 663cf6fc0d..a66e1d20e7 100644
--- a/apps/iframe/src/requests/tests/wallet_watchAsset.spec.ts
+++ b/apps/iframe/src/requests/tests/wallet_watchAsset.spec.ts
@@ -4,7 +4,7 @@ import type { HappyUser } from "@happy.tech/wallet-common"
 import { beforeEach, describe, expect, test, vi } from "vitest"
 import { setAuthState } from "#src/state/authState"
 import { setUser } from "#src/state/user"
-import { getWatchedAssets } from "#src/state/watchedAssets.ts"
+import { getWatchedAssets } from "#src/state/watchedAssets"
 import { dispatchApprovedRequest } from "../handlers/approved"
 
 const { walletID, appURLMock } = await vi //
diff --git a/apps/iframe/src/requests/utils/boop.ts b/apps/iframe/src/requests/utils/boop.ts
index 29d0f8bdaf..4c2455d894 100644
--- a/apps/iframe/src/requests/utils/boop.ts
+++ b/apps/iframe/src/requests/utils/boop.ts
@@ -187,15 +187,16 @@ function safeParseSignature(validatorData?: Hex) {
 }
 
 export async function boopFromTransaction(account: Address, tx: ValidRpcTransactionRequest): Promise<Boop> {
-    // TODO bigint casts need validation
-
     return {
-        account: tx.from,
+        account: tx.from ?? account,
         dest: tx.to,
         payer: zeroAddress, // happyPaymaster, // TODO need to fund paymaster
-        value: tx.value ? BigInt(tx.value) : 0n,
+        value: tx.value !== undefined ? (parseBigInt(tx.value) ?? 0n) : 0n,
         nonceTrack: 0n,
-        nonceValue: tx.nonce ? BigInt(tx.nonce) : await getNextNonce(account),
+        nonceValue:
+            tx.nonce !== undefined
+                ? (parseBigInt(tx.nonce) ?? (await getNextNonce(account)))
+                : await getNextNonce(account),
         callData: tx.data ?? "0x",
         validatorData: "0x", // we will fill after signing
         extraData: createValidatorExtraData(account, tx.to),
diff --git a/apps/iframe/src/requests/utils/checks.ts b/apps/iframe/src/requests/utils/checks.ts
index 2e69fd9d2d..f4ca468a86 100644
--- a/apps/iframe/src/requests/utils/checks.ts
+++ b/apps/iframe/src/requests/utils/checks.ts
@@ -28,20 +28,21 @@ export function checkAuthenticated() {
 /**
  * Type of valid tx requests, use {@link checkedTx} to verify.
  */
-export type ValidRpcTransactionRequest = RpcTransactionRequest & { from: Address; to: Address }
+export type ValidRpcTransactionRequest = RpcTransactionRequest & { to: Address }
 
 /**
  * Asserts that the transaction has its destination defined, throws a {@link EIP1474InvalidInput}.
  * @throws EIP1474InvalidInput if the transaction is malformatted
  */
 export function checkedTx(tx: RpcTransactionRequest): ValidRpcTransactionRequest {
+    // Check required fields
     if (!tx.to) /****/ throw new EIP1474InvalidInput("missing 'to' field in transaction parameters")
-    if (!tx.from) /**/ throw new EIP1474InvalidInput("missing 'from' field in transaction parameters")
 
+    // Validate addresses
     if (!isAddress(tx.to)) /****/ throw new EIP1474InvalidInput(`not an address: ${tx.to}`)
-    if (!isAddress(tx.from)) /**/ throw new EIP1474InvalidInput(`not an address: ${tx.from}`)
+    if (tx.from !== undefined && !isAddress(tx.from)) /**/ throw new EIP1474InvalidInput(`not an address: ${tx.from}`)
 
-    // Check if value exists and can be parsed as BigInt (allows zero values)
+    // Check if the value and nonce exist, and can be parsed as BigInt (allows zero values)
     if (tx.value !== undefined && parseBigInt(tx.value) === undefined)
         throw new EIP1474InvalidInput(`value is not a number: ${tx.value}`)
     if (tx.nonce !== undefined && parseBigInt(tx.nonce) === undefined)
diff --git a/apps/iframe/src/requests/utils/sendResponse.ts b/apps/iframe/src/requests/utils/sendResponse.ts
index 62fcf13b31..742531178d 100644
--- a/apps/iframe/src/requests/utils/sendResponse.ts
+++ b/apps/iframe/src/requests/utils/sendResponse.ts
@@ -9,10 +9,10 @@ import {
 } from "@happy.tech/wallet-common"
 // biome-ignore lint/correctness/noUnusedImports: keep type for doc
 import { RpcError, type UnauthorizedProviderError } from "viem"
-import { InjectedProviderProxy } from "#src/connections/InjectedProviderProxy.ts"
+import { InjectedProviderProxy } from "#src/connections/InjectedProviderProxy"
 import { happyProviderBus } from "#src/services/eventBus"
 import { getCurrentChain } from "#src/state/chains"
-import { getUser } from "#src/state/user.ts"
+import { getUser } from "#src/state/user"
 import { appForSourceID, isWallet } from "#src/utils/appURL"
 import { reqLogger } from "#src/utils/logger"
 import { iframeProvider } from "#src/wagmi/provider"
diff --git a/apps/iframe/src/requests/utils/sessionKeys.ts b/apps/iframe/src/requests/utils/sessionKeys.ts
index faf14b89d4..10b261ff5d 100644
--- a/apps/iframe/src/requests/utils/sessionKeys.ts
+++ b/apps/iframe/src/requests/utils/sessionKeys.ts
@@ -12,11 +12,11 @@ import { Permissions } from "#src/constants/permissions"
 import { sendBoop } from "#src/requests/utils/boop"
 import { eoaSigner } from "#src/requests/utils/signers"
 import { StorageKey, storage } from "#src/services/storage"
-import { revokedSessionKeys } from "#src/state/interfaceState.ts"
+import { revokedSessionKeys } from "#src/state/interfaceState"
 import { getPermissions, grantPermissions, revokePermissions } from "#src/state/permissions"
 import { getPublicClient } from "#src/state/publicClient"
-import { getCheckedUser } from "#src/state/user.ts"
-import { getWalletClient } from "#src/state/walletClient.ts"
+import { getCheckedUser } from "#src/state/user"
+import { getWalletClient } from "#src/state/walletClient"
 import type { AppURL } from "#src/utils/appURL"
 import { sessionKeyLogger } from "#src/utils/logger"
 
diff --git a/apps/iframe/src/requests/utils/shared.ts b/apps/iframe/src/requests/utils/shared.ts
index ede5fd3435..e24720fc4c 100644
--- a/apps/iframe/src/requests/utils/shared.ts
+++ b/apps/iframe/src/requests/utils/shared.ts
@@ -123,7 +123,8 @@ export async function eth_estimateGas(
     user: HappyUser | undefined,
     tx: ValidRpcTransactionRequest,
 ): Promise<Hex | Forward> {
-    if (user?.address !== tx.from) return FORWARD
+    const account = user?.address ?? tx.from
+    if (!account || account !== tx.from) return FORWARD
 
     try {
         const boopClient = getBoopClient()
@@ -131,7 +132,7 @@ export async function eth_estimateGas(
 
         // boopFromTransaction already handles both legacy and EIP-1559 transactions
         // by converting gasPrice to maxFeePerGas when needed
-        const boop = await boopFromTransaction(user?.address, tx)
+        const boop = await boopFromTransaction(account, tx)
         const output = await boopClient.simulate({ entryPoint, boop })
 
         if (output.status !== Onchain.Success) {
diff --git a/apps/iframe/src/routes/__root.tsx b/apps/iframe/src/routes/__root.tsx
index c6a66322ce..ba35df98a5 100644
--- a/apps/iframe/src/routes/__root.tsx
+++ b/apps/iframe/src/routes/__root.tsx
@@ -1,9 +1,9 @@
 import { Outlet, type RouterEvents, createRootRoute, useRouter } from "@tanstack/react-router"
 import { revokedSessionKeys } from "#src/state/interfaceState"
 import type { AppURL } from "#src/utils/appURL"
-import "#src/connections/initialize.ts"
+import "#src/connections/initialize"
 import { useEffect } from "react"
-import { revokeSessionKeys } from "#src/requests/utils/sessionKeys.ts"
+import { revokeSessionKeys } from "#src/requests/utils/sessionKeys"
 import { DevTools } from "../components/DevTools"
 
 export const Route = createRootRoute({
diff --git a/apps/iframe/src/state/injectedClient.ts b/apps/iframe/src/state/injectedClient.ts
index d1048fb79d..a3659844ca 100644
--- a/apps/iframe/src/state/injectedClient.ts
+++ b/apps/iframe/src/state/injectedClient.ts
@@ -1,7 +1,7 @@
 import { accessorsFromAtom } from "@happy.tech/common"
 import { type Atom, atom } from "jotai"
 import { createWalletClient, custom } from "viem"
-import { InjectedProviderProxy } from "#src/connections/InjectedProviderProxy.ts"
+import { InjectedProviderProxy } from "#src/connections/InjectedProviderProxy"
 import { userAtom } from "./user"
 import type { AccountWalletClient } from "./walletClient"
 
diff --git a/apps/iframe/src/state/permissions.spec.ts b/apps/iframe/src/state/permissions.spec.ts
index 954f720c00..2895803552 100644
--- a/apps/iframe/src/state/permissions.spec.ts
+++ b/apps/iframe/src/state/permissions.spec.ts
@@ -8,7 +8,7 @@ import {
     grantPermissions,
     hasPermissions,
     revokePermissions,
-} from "#src/state/permissions.ts"
+} from "#src/state/permissions"
 import { setUser } from "../state/user"
 
 const { appURL, walletURL, appURLMock } = await vi //
diff --git a/apps/iframe/src/utils/emitUserUpdate.ts b/apps/iframe/src/utils/emitUserUpdate.ts
index 12b213841c..9bd162ddda 100644
--- a/apps/iframe/src/utils/emitUserUpdate.ts
+++ b/apps/iframe/src/utils/emitUserUpdate.ts
@@ -1,6 +1,6 @@
 import { debounce } from "@happy.tech/common"
 import { type HappyUser, Msgs } from "@happy.tech/wallet-common"
-import { hasPermissions } from "#src/state/permissions.ts"
+import { hasPermissions } from "#src/state/permissions"
 import { appMessageBus, happyProviderBus } from "../services/eventBus"
 import { getAppURL, isStandaloneWallet } from "./appURL"
 
diff --git a/apps/iframe/src/utils/walletState.ts b/apps/iframe/src/utils/walletState.ts
index 3fb18b4915..686006d563 100644
--- a/apps/iframe/src/utils/walletState.ts
+++ b/apps/iframe/src/utils/walletState.ts
@@ -1,7 +1,7 @@
 import { AuthState, Msgs } from "@happy.tech/wallet-common"
-import { appMessageBus } from "#src/services/eventBus.ts"
-import { getAuthState } from "#src/state/authState.ts"
-import { setWalletOpenSignal } from "#src/state/interfaceState.ts"
+import { appMessageBus } from "#src/services/eventBus"
+import { getAuthState } from "#src/state/authState"
+import { setWalletOpenSignal } from "#src/state/interfaceState"
 
 /**
  * Wallet State (open vs closed) is managed entirely through the WalletVisibility event here. This
diff --git a/apps/iframe/src/wagmi/provider.ts b/apps/iframe/src/wagmi/provider.ts
index 2d1bc6e08a..d58162e07a 100644
--- a/apps/iframe/src/wagmi/provider.ts
+++ b/apps/iframe/src/wagmi/provider.ts
@@ -8,9 +8,9 @@ import {
     waitForCondition,
 } from "@happy.tech/wallet-common"
 import type { EIP1193Provider } from "viem"
-import { addBanner } from "#src/state/banner.ts"
+import { addBanner } from "#src/state/banner"
 import { getCurrentChain } from "#src/state/chains"
-import { getUser } from "#src/state/user.ts"
+import { getUser } from "#src/state/user"
 import { handleInjectedRequest, handlePermissionlessRequest } from "../requests"
 import { getAuthState } from "../state/authState"
 import { getWalletURL, walletID } from "../utils/appURL"
diff --git a/packages/core/lib/config.ts b/packages/core/lib/config.ts
index 969fe0412d..ed3753745b 100644
--- a/packages/core/lib/config.ts
+++ b/packages/core/lib/config.ts
@@ -4,3 +4,8 @@
 export const config = {
     iframePath: import.meta.env.IFRAME_URL || "http://localhost:5160",
 }
+
+/** Box to hold the chainId loaded with {@link loadHappyWallet}. */
+export const chain = {
+    id: 0xdeadbeef,
+}
diff --git a/packages/core/lib/happyProvider/injectedWalletHandler.ts b/packages/core/lib/happyProvider/injectedWalletHandler.ts
index c37a2b245d..e45bf9ca38 100644
--- a/packages/core/lib/happyProvider/injectedWalletHandler.ts
+++ b/packages/core/lib/happyProvider/injectedWalletHandler.ts
@@ -1,6 +1,6 @@
 import type { UUID } from "@happy.tech/common"
 import { BasePopupProvider, type EIP1193RequestParameters, Msgs } from "@happy.tech/wallet-common"
-import { chain } from "../loadHappyWallet"
+import { chain } from "../config"
 import { InjectedWalletWrapper } from "./InjectedWalletWrapper"
 import type { HappyProviderConfig } from "./happyProviderImplem"
 import type { EIP1193ConnectionHandler } from "./interface"
diff --git a/packages/core/lib/happyProvider/socialWalletHandler.ts b/packages/core/lib/happyProvider/socialWalletHandler.ts
index 4503df7858..f499d74a21 100644
--- a/packages/core/lib/happyProvider/socialWalletHandler.ts
+++ b/packages/core/lib/happyProvider/socialWalletHandler.ts
@@ -1,8 +1,7 @@
 import { type UUID, createUUID, promiseWithResolvers } from "@happy.tech/common"
 import type { EIP1193RequestParameters, HappyUser, ProviderMsgsFromWallet } from "@happy.tech/wallet-common"
 import { AuthState, BasePopupProvider, LoginRequiredError, Msgs, OverlayErrorCode } from "@happy.tech/wallet-common"
-import { config } from "../config"
-import { chain } from "../loadHappyWallet"
+import { chain, config } from "../config"
 import { type HappyProviderConfig, HappyProviderImplem } from "./happyProviderImplem"
 import type { EIP1193ConnectionHandler } from "./interface"
 
diff --git a/packages/core/lib/index.ts b/packages/core/lib/index.ts
index 97a2915294..d01849969f 100644
--- a/packages/core/lib/index.ts
+++ b/packages/core/lib/index.ts
@@ -13,7 +13,7 @@ export {
     requestSessionKey,
     showSendScreen,
     onUserUpdate,
-} from "./functions.ts"
+} from "./functions"
 
 export { anvil, happyChainSepolia } from "@happy.tech/wallet-common"
 
diff --git a/packages/core/lib/loadHappyWallet.ts b/packages/core/lib/loadHappyWallet.ts
index 853f089707..2ccaac3bb0 100644
--- a/packages/core/lib/loadHappyWallet.ts
+++ b/packages/core/lib/loadHappyWallet.ts
@@ -1,16 +1,12 @@
 import { defaultChain } from "@happy.tech/wallet-common"
 import define from "preact-custom-element"
 import { defineBadgeComponent } from "./badge/define"
+import { chain } from "./config"
 import { windowId } from "./happyProvider"
 import { HappyOverlay } from "./overlay/HappyOverlay"
 import { HappyWallet } from "./wallet/HappyWallet"
 import { isFirefox, makeIframeUrl } from "./wallet/utils"
 
-/** Box to hold the chainId loaded with {@link loadHappyWallet}. */
-export const chain = {
-    id: 0xdeadbeef,
-}
-
 /**
  * Options for the {@link loadHappyWallet} function.
  */