feat: add hint

src/interface/naming.cairo

@@ -4,13 +4,17 @@ use naming::naming::main::Naming::{Discount, DomainData};
 #[starknet::interface]
 trait INaming<TContractState> {
     // view
-    fn resolve(self: @TContractState, domain: Span<felt252>, field: felt252) -> felt252;
+    fn resolve(
+        self: @TContractState, domain: Span<felt252>, field: felt252, hint: Span<felt252>
+    ) -> felt252;
 
     fn domain_to_data(self: @TContractState, domain: Span<felt252>) -> DomainData;
 
     fn domain_to_id(self: @TContractState, domain: Span<felt252>) -> u128;
 
-    fn domain_to_address(self: @TContractState, domain: Span<felt252>) -> ContractAddress;
+    fn domain_to_address(
+        self: @TContractState, domain: Span<felt252>, hint: Span<felt252>
+    ) -> ContractAddress;
 
     fn address_to_domain(self: @TContractState, address: ContractAddress) -> Span<felt252>;
 
@@ -43,6 +47,8 @@ trait INaming<TContractState> {
 
     fn reset_address_to_domain(ref self: TContractState);
 
+    fn set_domain_to_resolver(ref self: TContractState, domain: Span<felt252>, resolver: ContractAddress);
+
     // admin
     fn set_admin(ref self: TContractState, new_admin: ContractAddress);
 

src/interface/resolver.cairo

@@ -2,5 +2,7 @@ use starknet::ContractAddress;
 
 #[starknet::interface]
 trait IResolver<TContractState> {
-    fn resolve(self: @TContractState, domain: Span<felt252>, field: felt252) -> felt252;
+    fn resolve(
+        self: @TContractState, domain: Span<felt252>, field: felt252, hint: Span<felt252>
+    ) -> felt252;
 }

src/naming/internal.cairo

@@ -145,14 +145,14 @@ impl InternalImpl of InternalTrait {
 
     // returns domain_hash (or zero) and its value for a specific field
     fn resolve_util(
-        self: @Naming::ContractState, domain: Span<felt252>, field: felt252
+        self: @Naming::ContractState, domain: Span<felt252>, field: felt252, hint: Span<felt252>
     ) -> (felt252, felt252) {
         let (resolver, parent_start) = self.domain_to_resolver(domain, 1);
         if (resolver != ContractAddressZeroable::zero()) {
             (
                 0,
                 IResolverDispatcher { contract_address: resolver }
-                    .resolve(domain.slice(0, parent_start), field)
+                    .resolve(domain.slice(0, parent_start), field, hint)
             )
         } else {
             let hashed_domain = self.hash_domain(domain);

src/naming/main.cairo

@@ -148,17 +148,21 @@ mod Naming {
         // For example, it allows to find the Bitcoin address of Alice.stark by calling
         // naming.resolve(['alice'], 'bitcoin')
         // Use it with caution in smartcontracts as it can call untrusted contracts
-        fn resolve(self: @ContractState, domain: Span<felt252>, field: felt252) -> felt252 {
-            let (_, value) = self.resolve_util(domain, field);
+        fn resolve(
+            self: @ContractState, domain: Span<felt252>, field: felt252, hint: Span<felt252>
+        ) -> felt252 {
+            let (_, value) = self.resolve_util(domain, field, hint);
             value
         }
 
         // This functions allows to resolve a domain to a native address. Its output is designed
         // to be used as a parameter for other functions (for example if you want to send ERC20
         // to a .stark)
-        fn domain_to_address(self: @ContractState, domain: Span<felt252>) -> ContractAddress {
+        fn domain_to_address(
+            self: @ContractState, domain: Span<felt252>, hint: Span<felt252>
+        ) -> ContractAddress {
             // resolve must be performed first because it calls untrusted resolving contracts
-            let (hashed_domain, value) = self.resolve_util(domain, 'starknet');
+            let (hashed_domain, value) = self.resolve_util(domain, 'starknet', hint);
             if value != 0 {
                 let addr: Option<ContractAddress> = value.try_into();
                 return addr.unwrap();
@@ -204,7 +208,8 @@ mod Naming {
         fn address_to_domain(self: @ContractState, address: ContractAddress) -> Span<felt252> {
             let mut domain = ArrayTrait::new();
             self.read_address_to_domain(address, ref domain);
-            if domain.len() != 0 && self.domain_to_address(domain.span()) == address {
+            if domain.len() != 0
+                && self.domain_to_address(domain.span(), array![].span()) == address {
                 domain.span()
             } else {
                 let identity = IIdentityDispatcher {
@@ -215,7 +220,10 @@ mod Naming {
                 let id_hashed_domain = identity
                     .get_verifier_data(id, 'name', get_contract_address(), 0);
                 let domain = self.unhash_domain(id_hashed_domain);
-                assert(self.domain_to_address(domain) == address, 'domain not pointing back');
+                assert(
+                    self.domain_to_address(domain, array![].span()) == address,
+                    'domain not pointing back'
+                );
                 domain
             }
         }
@@ -356,7 +364,10 @@ mod Naming {
         // will override your main id
         fn set_address_to_domain(ref self: ContractState, domain: Span<felt252>) {
             let address = get_caller_address();
-            assert(self.domain_to_address(domain) == address, 'domain not pointing back');
+            assert(
+                self.domain_to_address(domain, array![].span()) == address,
+                'domain not pointing back'
+            );
             self.emit(Event::AddressToDomainUpdate(AddressToDomainUpdate { address, domain }));
             self.set_address_to_domain_util(address, domain);
         }
@@ -372,6 +383,26 @@ mod Naming {
             self.set_address_to_domain_util(address, array![0].span());
         }
 
+        fn set_domain_to_resolver(
+            ref self: ContractState, domain: Span<felt252>, resolver: ContractAddress
+        ) {
+            self.assert_control_domain(domain, get_caller_address());
+
+            // Write domain owner
+            let hashed_domain = self.hash_domain(domain);
+            let current_domain_data = self._domain_data.read(hashed_domain);
+            let new_domain_data = DomainData {
+                owner: current_domain_data.owner,
+                resolver,
+                address: current_domain_data.address,
+                expiry: current_domain_data.expiry,
+                key: current_domain_data.key,
+                parent_key: current_domain_data.parent_key,
+            };
+            self._domain_data.write(hashed_domain, new_domain_data);
+            self.emit(Event::DomainResolverUpdate(DomainResolverUpdate { domain, resolver }));
+        }
+
         // ADMIN
 
         fn set_admin(ref self: ContractState, new_admin: ContractAddress) {

src/tests/naming/test_custom_resolver.cairo

@@ -36,7 +36,9 @@ mod CustomResolver {
 
     #[external(v0)]
     impl AdditionResolveImpl of IResolver<ContractState> {
-        fn resolve(self: @ContractState, mut domain: Span<felt252>, field: felt252) -> felt252 {
+        fn resolve(
+            self: @ContractState, mut domain: Span<felt252>, field: felt252, hint: Span<felt252>
+        ) -> felt252 {
             let mut output = 0;
             loop {
                 match domain.pop_front() {
@@ -88,12 +90,12 @@ fn test_custom_resolver() {
 
     let domain = array![th0rgal].span();
     // by default we should have nothing written
-    assert(naming.resolve(domain, 'starknet') == 0, 'non empty starknet field');
+    assert(naming.resolve(domain, 'starknet', array![].span()) == 0, 'non empty starknet field');
     // so it should resolve to the starknetid owner
-    assert(naming.domain_to_address(domain) == caller, 'wrong domain target');
+    assert(naming.domain_to_address(domain, array![].span()) == caller, 'wrong domain target');
 
     let domain = array![1, 2, 3, th0rgal].span();
 
     // let's try the resolving
-    assert(naming.resolve(domain, 'starknet') == 1 + 2 + 3, 'wrong target');
+    assert(naming.resolve(domain, 'starknet', array![].span()) == 1 + 2 + 3, 'wrong target');
 }

src/tests/naming/test_features.cairo

@@ -63,7 +63,10 @@ fn test_subdomains() {
     // we transfer hello.th0rgal.stark to id2
     naming.transfer_domain(subdomain, id2);
 
-    assert(naming.domain_to_address(subdomain) == caller, 'wrong subdomain initial target');
+    assert(
+        naming.domain_to_address(subdomain, array![].span()) == caller,
+        'wrong subdomain initial target'
+    );
 
     // and make sure the owner has been updated
     assert(naming.domain_to_id(subdomain) == id2, 'owner not updated correctly');
@@ -78,7 +81,7 @@ fn test_subdomains() {
 
     // ensure the subdomain was reset
     assert(
-        naming.domain_to_address(subdomain) == ContractAddressZeroable::zero(),
+        naming.domain_to_address(subdomain, array![].span()) == ContractAddressZeroable::zero(),
         'target not updated correctly'
     );
 }

src/tests/naming/test_usecases.cairo

@@ -51,9 +51,9 @@ fn test_basic_usage() {
     // let's try the resolving
     let domain = array![th0rgal].span();
     // by default we should have nothing written
-    assert(naming.resolve(domain, 'starknet') == 0, 'non empty starknet field');
+    assert(naming.resolve(domain, 'starknet', array![].span()) == 0, 'non empty starknet field');
     // so it should resolve to the starknetid owner
-    assert(naming.domain_to_address(domain) == caller, 'wrong domain target');
+    assert(naming.domain_to_address(domain, array![].span()) == caller, 'wrong domain target');
 
     // let's try reverse resolving
     identity.set_main_id(id);
@@ -65,9 +65,12 @@ fn test_basic_usage() {
     identity.set_user_data(id, 'starknet', new_target.into(), 0);
 
     // now we should have nothing written
-    assert(naming.resolve(domain, 'starknet') == new_target.into(), 'wrong starknet field');
+    assert(
+        naming.resolve(domain, 'starknet', array![].span()) == new_target.into(),
+        'wrong starknet field'
+    );
     // and it should resolve to the new domain target
-    assert(naming.domain_to_address(domain) == new_target, 'wrong domain target');
+    assert(naming.domain_to_address(domain, array![].span()) == new_target, 'wrong domain target');
 
     // testing ownership transfer
     let new_id = 2;
@@ -249,7 +252,9 @@ fn test_set_address_to_domain() {
 
     // let's try the resolving
     let first_domain = array![first_domain_top].span();
-    assert(naming.domain_to_address(first_domain) == caller, 'wrong domain target');
+    assert(
+        naming.domain_to_address(first_domain, array![].span()) == caller, 'wrong domain target'
+    );
 
     // set reverse resolving
     identity.set_main_id(id1);
@@ -267,3 +272,32 @@ fn test_set_address_to_domain() {
     let expect_domain1 = naming.address_to_domain(caller);
     assert(expect_domain1 == first_domain, 'wrong rev resolving b');
 }
+
+#[test]
+#[available_gas(2000000000)]
+fn test_set_domain_to_resolver() {
+    // setup
+    let (eth, pricing, identity, naming) = deploy();
+    let caller = contract_address_const::<0x123>();
+    set_contract_address(caller);
+    let id1: u128 = 1;
+    let domain: felt252 = 82939898252385817;
+
+    //we mint the id
+    identity.mint(id1);
+
+    // buy the domain
+    let (_, price1) = pricing.compute_buy_price(11, 365);
+    eth.approve(naming.contract_address, price1);
+    naming
+        .buy(
+            id1, domain, 365, ContractAddressZeroable::zero(), ContractAddressZeroable::zero(), 0, 0
+        );
+
+    // set resolver 
+    let resolver = contract_address_const::<0x456>();
+    naming.set_domain_to_resolver(array![domain].span(), resolver);
+
+    let data = naming.domain_to_data(array![domain].span());
+    assert(data.resolver == resolver, 'wrong resolver');
+}