1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

/// The core methods for a basic non-fungible token. Extension standards may be
/// added in addition to this macro.
#[macro_export]
macro_rules! impl_non_fungible_token_core {
    ($contract: ident, $token: ident) => {
        use std::collections::HashMap;
        use $crate::non_fungible_token::core::NonFungibleTokenCore;
        use $crate::non_fungible_token::core::NonFungibleTokenResolver;

        #[near_bindgen]
        impl NonFungibleTokenCore for $contract {
            #[payable]
            fn nft_transfer(
                &mut self,
                receiver_id: AccountId,
                token_id: TokenId,
                approval_id: Option<u64>,
                memo: Option<String>,
            ) {
                self.$token.nft_transfer(receiver_id, token_id, approval_id, memo)
            }

            #[payable]
            fn nft_transfer_call(
                &mut self,
                receiver_id: AccountId,
                token_id: TokenId,
                approval_id: Option<u64>,
                memo: Option<String>,
                msg: String,
            ) -> PromiseOrValue<bool> {
                self.$token.nft_transfer_call(receiver_id, token_id, approval_id, memo, msg)
            }

            fn nft_token(&self, token_id: TokenId) -> Option<Token> {
                self.$token.nft_token(token_id)
            }
        }

        #[near_bindgen]
        impl NonFungibleTokenResolver for $contract {
            #[private]
            fn nft_resolve_transfer(
                &mut self,
                previous_owner_id: AccountId,
                receiver_id: AccountId,
                token_id: TokenId,
                approved_account_ids: Option<HashMap<AccountId, u64>>,
            ) -> bool {
                self.$token.nft_resolve_transfer(
                    previous_owner_id,
                    receiver_id,
                    token_id,
                    approved_account_ids,
                )
            }
        }
    };
}

/// Non-fungible token approval management allows for an escrow system where
/// multiple approvals per token exist.
#[macro_export]
macro_rules! impl_non_fungible_token_approval {
    ($contract: ident, $token: ident) => {
        use $crate::non_fungible_token::approval::NonFungibleTokenApproval;

        #[near_bindgen]
        impl NonFungibleTokenApproval for $contract {
            #[payable]
            fn nft_approve(
                &mut self,
                token_id: TokenId,
                account_id: AccountId,
                msg: Option<String>,
            ) -> Option<Promise> {
                self.$token.nft_approve(token_id, account_id, msg)
            }

            #[payable]
            fn nft_revoke(&mut self, token_id: TokenId, account_id: AccountId) {
                self.$token.nft_revoke(token_id, account_id)
            }

            #[payable]
            fn nft_revoke_all(&mut self, token_id: TokenId) {
                self.$token.nft_revoke_all(token_id)
            }

            fn nft_is_approved(
                &self,
                token_id: TokenId,
                approved_account_id: AccountId,
                approval_id: Option<u64>,
            ) -> bool {
                self.$token.nft_is_approved(token_id, approved_account_id, approval_id)
            }
        }
    };
}

/// Non-fungible enumeration adds the extension standard offering several
/// view-only methods to get token supply, tokens per owner, etc.
#[macro_export]
macro_rules! impl_non_fungible_token_enumeration {
    ($contract: ident, $token: ident) => {
        use near_sdk::json_types::U128;
        use $crate::non_fungible_token::enumeration::NonFungibleTokenEnumeration;

        #[near_bindgen]
        impl NonFungibleTokenEnumeration for $contract {
            fn nft_total_supply(&self) -> U128 {
                self.$token.nft_total_supply()
            }

            fn nft_tokens(&self, from_index: Option<U128>, limit: Option<u64>) -> Vec<Token> {
                self.$token.nft_tokens(from_index, limit)
            }

            fn nft_supply_for_owner(&self, account_id: AccountId) -> U128 {
                self.$token.nft_supply_for_owner(account_id)
            }

            fn nft_tokens_for_owner(
                &self,
                account_id: AccountId,
                from_index: Option<U128>,
                limit: Option<u64>,
            ) -> Vec<Token> {
                self.$token.nft_tokens_for_owner(account_id, from_index, limit)
            }
        }
    };
}