Sanctions (#177)

* feat: implement basic sanctions

* chore: useOfacSanctioned

* chore: eqAddress

* chore: comments

* chore: named fns

src/features/sanctions/hooks/useIsAccountChainalysisSanctioned.ts

@@ -0,0 +1,43 @@
+import { isAddress } from 'viem';
+import { useContractRead } from 'wagmi';
+
+import { useEvmAccount } from '../../wallet/hooks/evm';
+
+// https://go.chainalysis.com/chainalysis-oracle-docs.html
+const ORACLE_ABI = [
+  {
+    inputs: [
+      {
+        internalType: 'address',
+        name: 'addr',
+        type: 'address',
+      },
+    ],
+    name: 'isSanctioned',
+    outputs: [
+      {
+        internalType: 'bool',
+        name: '',
+        type: 'bool',
+      },
+    ],
+    stateMutability: 'view',
+    type: 'function',
+  },
+] as const;
+const ORACLE_ADDRESS = '0x40C57923924B5c5c5455c48D93317139ADDaC8fb';
+
+export function useIsAccountChainalysisSanctioned() {
+  const evmAddress = useEvmAccount().addresses[0]?.address;
+
+  const sanctioned = useContractRead({
+    abi: ORACLE_ABI,
+    functionName: 'isSanctioned',
+    args: [isAddress(evmAddress) ? evmAddress : '0x'],
+    chainId: 1,
+    address: ORACLE_ADDRESS,
+    enabled: !!evmAddress,
+  });
+
+  return !!sanctioned.data;
+}

src/features/sanctions/hooks/useIsAccountOfacSanctioned.ts

@@ -0,0 +1,24 @@
+import { useQuery } from '@tanstack/react-query';
+
+import { eqAddress } from '@hyperlane-xyz/utils';
+
+import { useEvmAccount } from '../../wallet/hooks/evm';
+
+const OFAC_SANCTIONED_ADDRESSES_ENDPOINT =
+  'https://raw.githubusercontent.com/0xB10C/ofac-sanctioned-digital-currency-addresses/lists/sanctioned_addresses_ETH.json';
+
+export function useIsAccountOfacSanctioned() {
+  const evmAddress = useEvmAccount().addresses[0]?.address;
+
+  const sanctionedAddresses = useQuery<string[]>({
+    queryKey: ['useIsAccountOfacSanctioned', evmAddress],
+    queryFn: () => fetch(OFAC_SANCTIONED_ADDRESSES_ENDPOINT).then((x) => x.json()),
+    enabled: !!evmAddress,
+  });
+
+  return (
+    !!sanctionedAddresses.data &&
+    !!evmAddress &&
+    !!sanctionedAddresses.data.find((x) => eqAddress(x, evmAddress))
+  );
+}

src/features/sanctions/hooks/useIsAccountSanctioned.ts

@@ -0,0 +1,9 @@
+import { useIsAccountChainalysisSanctioned } from './useIsAccountChainalysisSanctioned';
+import { useIsAccountOfacSanctioned } from './useIsAccountOfacSanctioned';
+
+export function useIsAccountSanctioned() {
+  const isAccountOfacSanctioned = useIsAccountOfacSanctioned();
+  const isAccountChainalysisSanctioned = useIsAccountChainalysisSanctioned();
+
+  return isAccountOfacSanctioned || isAccountChainalysisSanctioned;
+}

src/features/transfer/TransferTokenForm.tsx

@@ -19,6 +19,7 @@ import { Color } from '../../styles/Color';
 import { logger } from '../../utils/logger';
 import { ChainSelectField } from '../chains/ChainSelectField';
 import { getChainDisplayName } from '../chains/utils';
+import { useIsAccountSanctioned } from '../sanctions/hooks/useIsAccountSanctioned';
 import { useStore } from '../store';
 import { SelectOrInputTokenIds } from '../tokens/SelectOrInputTokenIds';
 import { TokenSelectField } from '../tokens/TokenSelectField';
@@ -215,6 +216,7 @@ function ButtonSection({
   setIsReview: (b: boolean) => void;
 }) {
   const { values } = useFormikContext<TransferFormValues>();
+  const isSanctioned = useIsAccountSanctioned();
 
   const onDoneTransactions = () => {
     setIsReview(false);
@@ -228,6 +230,9 @@ function ButtonSection({
   }));
 
   const triggerTransactionsHandler = async () => {
+    if (isSanctioned) {
+      return;
+    }
     setTransferLoading(true);
     await triggerTransactions(values);
   };