[skip ci] better types for tx interpretation

configs/app/features/txInterpretation.ts

 import type { Feature } from './types';
+import type { Provider } from 'types/client/txInterpretation';
+import { PROVIDERS } from 'types/client/txInterpretation';
 
 import { getEnvValue } from '../utils';
 
 const title = 'Transaction interpretation';
 
-const provider = getEnvValue('NEXT_PUBLIC_TRANSACTION_INTERPRETATION_PROVIDER') || 'none';
+const provider: Provider = (() => {
+  const value = getEnvValue('NEXT_PUBLIC_TRANSACTION_INTERPRETATION_PROVIDER');
 
-const config: Feature<{ provider: string }> = (() => {
+  if (value && PROVIDERS.includes(value as Provider)) {
+    return value as Provider;
+  }
+
+  return 'none';
+})();
+
+const config: Feature<{ provider: Provider }> = (() => {
   if (provider !== 'none') {
     return Object.freeze({
       title,

deploy/tools/envs-validator/schema.ts

@@ -15,6 +15,7 @@ import type { MarketplaceAppOverview } from '../../../types/client/marketplace';
 import { NAVIGATION_LINK_IDS } from '../../../types/client/navigation-items';
 import type { NavItemExternal, NavigationLinkId } from '../../../types/client/navigation-items';
 import type { BridgedTokenChain, TokenBridge } from '../../../types/client/token';
+import { PROVIDERS as TX_INTERPRETATION_PROVIDERS } from '../../../types/client/txInterpretation';
 import type { WalletType } from '../../../types/client/wallets';
 import { SUPPORTED_WALLETS } from '../../../types/client/wallets';
 import type { CustomLink, CustomLinksGroup } from '../../../types/footerLinks';
@@ -438,7 +439,7 @@ const schema = yup
         return isNoneSchema.isValidSync(data) || isArrayOfWalletsSchema.isValidSync(data);
       }),
     NEXT_PUBLIC_WEB3_DISABLE_ADD_TOKEN_TO_WALLET: yup.boolean(),
-    NEXT_PUBLIC_TRANSACTION_INTERPRETATION_PROVIDER: yup.string().oneOf([ 'blockscout', 'none' ]),
+    NEXT_PUBLIC_TRANSACTION_INTERPRETATION_PROVIDER: yup.string().oneOf(TX_INTERPRETATION_PROVIDERS),
     NEXT_PUBLIC_AD_TEXT_PROVIDER: yup.string<AdTextProviders>().oneOf(SUPPORTED_AD_TEXT_PROVIDERS),
     NEXT_PUBLIC_PROMOTE_BLOCKSCOUT_IN_TITLE: yup.boolean(),
     NEXT_PUBLIC_OG_DESCRIPTION: yup.string(),

types/client/txInterpretation.ts

+import type { ArrayElement } from 'types/utils';
+
+export const PROVIDERS = [
+  'blockscout',
+  'none',
+] as const;
+
+export type Provider = ArrayElement<typeof PROVIDERS>;