feat(BAPP-790): Devcon discount validator (#1246)

apps/web/src/addresses/usernames.ts

@@ -101,3 +101,8 @@ export const BASE_WORLD_DISCOUNT_VALIDATORS: AddressMap = {
   [baseSepolia.id]: '0xFa69f6167F40247fe3EFF2d8375B25C5d7834c48',
   [base.id]: '0xfEb00a4EfF372a307fDc556Cf4359f7D679E4d11',
 };
+
+export const DEVCON_DISCOUNT_VALIDATORS: AddressMap = {
+  [baseSepolia.id]: '0x5c81c392C22Cba477a70D809DE6d6Cd362A1c3DE',
+  [base.id]: '0xFca2EB54EaB56085e25a32BfF30fe8C452216c5F',
+};

apps/web/src/components/Basenames/RegistrationLearnMoreModal/index.tsx

@@ -10,6 +10,7 @@ import summerPassLvl3 from './images/summer-pass-lvl-3.svg';
 import cbidVerification from './images/cbid-verification.svg';
 import BNSOwnership from './images/bns.jpg';
 import BaseNFT from './images/base-nft.svg';
+import DevconPNG from './images/devcon.png';
 import TalentProtocolIcon from './images/TalentProtocol.svg';
 import coinbaseOneVerification from './images/coinbase-one-verification.svg';
 import coinbaseVerification from './images/coinbase-verification.svg';
@@ -95,6 +96,13 @@ const DISCOUNT_ITEMS: DiscountItem[] = [
     label: 'Base around the world NFT',
     tooltipContent: 'Available for anyone holding one of the Base around the world NFTs',
   },
+  {
+    discount: Discount.DEVCON,
+    icon: DevconPNG,
+    alt: 'icon of Devcon',
+    label: 'Devcon attendance NFT',
+    tooltipContent: 'Available for anyone holding one of the Base Devcon NFTs',
+  },
 ];
 
 export default function RegistrationLearnMoreModal({

apps/web/src/hooks/useAggregatedDiscountValidators.ts

@@ -8,6 +8,7 @@ import {
   useCheckCBIDAttestations,
   useCheckCoinbaseAttestations,
   useCheckEAAttestations,
+  useDevconAttestations,
   useDiscountCodeAttestations,
   useSummerPassAttestations,
   useTalentProtocolAttestations,
@@ -58,6 +59,7 @@ export function useAggregatedDiscountValidators(code?: string) {
   const { data: TalentProtocolData, loading: loadingTalentProtocolAttestations } =
     useTalentProtocolAttestations();
   const { data: BaseWorldData, loading: loadingBaseWorld } = useBaseWorldAttestations();
+  const { data: DevconData, loading: loadingDevcon } = useDevconAttestations();
 
   const loadingDiscounts =
     loadingCoinbaseAttestations ||
@@ -71,7 +73,8 @@ export function useAggregatedDiscountValidators(code?: string) {
     loadingBNS ||
     loadingDiscountCode ||
     loadingTalentProtocolAttestations ||
-    loadingBaseWorld;
+    loadingBaseWorld ||
+    loadingDevcon;
 
   const discountsToAttestationData = useMemo<MappedDiscountData>(() => {
     const discountMapping: MappedDiscountData = {};
@@ -153,6 +156,13 @@ export function useAggregatedDiscountValidators(code?: string) {
           discountKey: validator.key,
         };
       }
+
+      if (DevconData && validator.discountValidator === DevconData.discountValidatorAddress) {
+        discountMapping[Discount.DEVCON] = {
+          ...DevconData,
+          discountKey: validator.key,
+        };
+      }
     });
 
     return discountMapping;
@@ -169,6 +179,7 @@ export function useAggregatedDiscountValidators(code?: string) {
     DiscountCodeData,
     TalentProtocolData,
     BaseWorldData,
+    DevconData,
   ]);
 
   return {

apps/web/src/hooks/useAttestations.ts

@@ -12,6 +12,7 @@ import {
   BASE_DOT_ETH_ERC721_DISCOUNT_VALIDATOR,
   BASE_WORLD_DISCOUNT_VALIDATORS,
   BUILDATHON_ERC721_DISCOUNT_VALIDATOR,
+  DEVCON_DISCOUNT_VALIDATORS,
   TALENT_PROTOCOL_DISCOUNT_VALIDATORS,
   USERNAME_1155_DISCOUNT_VALIDATORS,
 } from 'apps/web/src/addresses/usernames';
@@ -638,3 +639,39 @@ export function useBaseWorldAttestations() {
 
   return { data: null, loading: isLoading, error };
 }
+
+const devconTokenIds = [BigInt(100), BigInt(101)];
+
+export function useDevconAttestations() {
+  const { address } = useAccount();
+  const { basenameChain } = useBasenameChain();
+
+  const discountValidatorAddress = DEVCON_DISCOUNT_VALIDATORS[basenameChain.id];
+
+  const readContractArgs = useMemo(() => {
+    if (!address) {
+      return {};
+    }
+    return {
+      address: discountValidatorAddress,
+      abi: ERC1155DiscountValidatorV2,
+      functionName: 'isValidDiscountRegistration',
+      args: [address, encodeAbiParameters([{ type: 'uint256[]' }], [devconTokenIds])],
+    };
+  }, [address, discountValidatorAddress]);
+
+  const { data: isValid, isLoading, error } = useReadContract({ ...readContractArgs, query: {} });
+  if (isValid && address) {
+    return {
+      data: {
+        discountValidatorAddress,
+        discount: Discount.DEVCON,
+        validationData: encodeAbiParameters([{ type: 'uint256[]' }], [devconTokenIds]),
+      },
+      loading: false,
+      error: null,
+    };
+  }
+
+  return { data: null, loading: isLoading, error };
+}

apps/web/src/utils/usernames.ts

@@ -399,6 +399,7 @@ export enum Discount {
   DISCOUNT_CODE = 'DISCOUNT_CODE',
   TALENT_PROTOCOL = 'TALENT_PROTOCOL',
   BASE_WORLD = 'BASE_WORLD',
+  DEVCON = 'DEVCON',
 }
 
 export function isValidDiscount(key: string): key is keyof typeof Discount {