diff --git a/src/lib/components/Error/ErrorBoundary.tsx b/src/lib/components/Error/ErrorBoundary.tsx
index 0118447381..9071616e60 100644
--- a/src/lib/components/Error/ErrorBoundary.tsx
+++ b/src/lib/components/Error/ErrorBoundary.tsx
@@ -34,7 +34,7 @@ export default class ErrorBoundary extends React.Component<ErrorBoundaryProps, E
         <Dialog color="dialog">
           <ErrorDialog
             error={this.state.error}
-            header={<Trans>Reload the page to try again</Trans>}
+            header={<Trans>Something went wrong.</Trans>}
             action={<Trans>Reload the page</Trans>}
             onAction={() => window.location.reload()}
           />
diff --git a/src/lib/components/Error/ErrorDialog.tsx b/src/lib/components/Error/ErrorDialog.tsx
index 95db5a8eca..920582b950 100644
--- a/src/lib/components/Error/ErrorDialog.tsx
+++ b/src/lib/components/Error/ErrorDialog.tsx
@@ -117,7 +117,10 @@ export default function ErrorDialog({ header, error, action, onAction }: ErrorDi
         <Rule />
         <ErrorColumn>
           <Column gap={0.5} ref={setDetails} css={scrollbar}>
-            <ThemedText.Code>{error.message}</ThemedText.Code>
+            <ThemedText.Code>
+              {error.name}
+              {error.message ? `: ${error.message}` : ''}
+            </ThemedText.Code>
           </Column>
         </ErrorColumn>
         <ActionButton onClick={onAction}>{action}</ActionButton>
diff --git a/src/lib/components/Error/ErrorGenerator.tsx b/src/lib/components/Error/ErrorGenerator.tsx
new file mode 100644
index 0000000000..b5d38bcdd9
--- /dev/null
+++ b/src/lib/components/Error/ErrorGenerator.tsx
@@ -0,0 +1,57 @@
+import { ALL_SUPPORTED_CHAIN_IDS } from 'constants/chains'
+import { ChainIdError, IntegrationError } from 'lib/errors'
+import useActiveWeb3React from 'lib/hooks/useActiveWeb3React'
+import { SwapWidgetProps } from 'lib/index'
+import { useEffect } from 'react'
+
+import { isAddress } from '../../../utils'
+
+export default function ErrorGenerator(swapWidgetProps: SwapWidgetProps) {
+  const { jsonRpcEndpoint, provider } = swapWidgetProps
+  useEffect(() => {
+    if (!provider && !jsonRpcEndpoint) {
+      throw new IntegrationError('This widget requires a provider or jsonRpcEndpoint.')
+    }
+  }, [provider, jsonRpcEndpoint])
+
+  const { chainId } = useActiveWeb3React()
+  useEffect(() => {
+    if (chainId && !ALL_SUPPORTED_CHAIN_IDS.includes(chainId)) {
+      throw new ChainIdError('Switch to a network supported by the Uniswap Protocol.')
+    }
+  }, [chainId])
+
+  // size constraints
+  const { width } = swapWidgetProps
+  useEffect(() => {
+    if (width && width < 300) {
+      throw new IntegrationError('Set widget width to at least 300px.')
+    }
+  }, [width])
+
+  // convenience fee constraints
+  const { convenienceFee, convenienceFeeRecipient } = swapWidgetProps
+  useEffect(() => {
+    if (convenienceFee) {
+      if (convenienceFee > 100 || convenienceFee < 0) {
+        throw new IntegrationError('Set widget convenienceFee to at least 400px.')
+      }
+      if (!convenienceFeeRecipient) {
+        throw new IntegrationError('convenienceFeeRecipient is required when convenienceFee is set.')
+      }
+      const MustBeValidAddressError = new IntegrationError('convenienceFeeRecipient must be a valid address.')
+      if (typeof convenienceFeeRecipient === 'string') {
+        if (!isAddress(convenienceFeeRecipient)) {
+          throw MustBeValidAddressError
+        }
+      } else if (typeof convenienceFeeRecipient === 'object') {
+        Object.values(convenienceFeeRecipient).forEach((recipient) => {
+          if (!isAddress(recipient)) {
+            throw MustBeValidAddressError
+          }
+        })
+      }
+    }
+  }, [convenienceFee, convenienceFeeRecipient])
+  return null
+}
diff --git a/src/lib/components/Swap/index.tsx b/src/lib/components/Swap/index.tsx
index 1dc1e50049..28d8c3dda6 100644
--- a/src/lib/components/Swap/index.tsx
+++ b/src/lib/components/Swap/index.tsx
@@ -39,6 +39,8 @@ function useSwapDefaults(defaults: Partial<SwapDefaults> = {}): SwapDefaults {
 }
 
 export interface SwapProps {
+  convenienceFee?: number
+  convenienceFeeRecipient?: string // TODO: improve typing to require recipient when fee is set
   defaults?: Partial<SwapDefaults>
 }
 
diff --git a/src/lib/components/Widget.tsx b/src/lib/components/Widget.tsx
index 25c731ab33..0aad902099 100644
--- a/src/lib/components/Widget.tsx
+++ b/src/lib/components/Widget.tsx
@@ -11,6 +11,7 @@ import { Provider as EthProvider } from 'widgets-web3-react/types'
 
 import { Provider as DialogProvider } from './Dialog'
 import ErrorBoundary, { ErrorHandler } from './Error/ErrorBoundary'
+import ErrorGenerator from './Error/ErrorGenerator'
 import Web3Provider from './Web3Provider'
 
 const slideDown = keyframes`
@@ -90,19 +91,19 @@ export type WidgetProps<T extends JSXElementConstructor<any> | undefined = undef
   : // eslint-disable-next-line @typescript-eslint/ban-types
     {})
 
-export default function Widget({
-  children,
-  theme,
-  locale = DEFAULT_LOCALE,
-  provider,
-  jsonRpcEndpoint,
-  width = 360,
-  dialog,
-  className,
-  onError,
-}: PropsWithChildren<WidgetProps>) {
+export default function Widget(props: PropsWithChildren<WidgetProps>) {
+  const {
+    children,
+    theme,
+    locale = DEFAULT_LOCALE,
+    provider,
+    jsonRpcEndpoint,
+    width = 360,
+    dialog,
+    className,
+    onError,
+  } = props
   const wrapper = useRef<HTMLDivElement>(null)
-
   return (
     <StrictMode>
       <I18nProvider locale={locale}>
@@ -114,6 +115,7 @@ export default function Widget({
                   <AtomProvider>
                     <Web3Provider provider={provider} jsonRpcEndpoint={jsonRpcEndpoint}>
                       <Updaters />
+                      <ErrorGenerator {...props} />
                       {children}
                     </Web3Provider>
                   </AtomProvider>
diff --git a/src/lib/errors.ts b/src/lib/errors.ts
new file mode 100644
index 0000000000..31080a1cd1
--- /dev/null
+++ b/src/lib/errors.ts
@@ -0,0 +1,13 @@
+export class IntegrationError extends Error {
+  constructor(message: string) {
+    super(message)
+    this.name = 'Integration Error'
+  }
+}
+
+export class ChainIdError extends Error {
+  constructor(message: string) {
+    super(message)
+    this.name = 'Unsupported network'
+  }
+}