pub trait FungibleTokenResolver {
// Required method
fn ft_resolve_transfer(
&mut self,
sender_id: AccountId,
receiver_id: AccountId,
amount: U128,
) -> U128;
}Expand description
FungibleTokenResolver provides token transfer resolve functionality.
§Examples
use near_sdk::{near, PanicOnDefault, AccountId, log};
use near_sdk::collections::LazyOption;
use near_sdk::json_types::U128;
use near_contract_standards::fungible_token::{FungibleToken, FungibleTokenResolver};
use near_contract_standards::fungible_token::metadata::FungibleTokenMetadata;
#[near(contract_state)]
#[derive(PanicOnDefault)]
pub struct Contract {
token: FungibleToken,
metadata: LazyOption<FungibleTokenMetadata>,
}
#[near]
impl FungibleTokenResolver for Contract {
#[private]
fn ft_resolve_transfer(
&mut self,
sender_id: AccountId,
receiver_id: AccountId,
amount: U128,
) -> U128 {
let (used_amount, burned_amount) =
self.token.internal_ft_resolve_transfer(&sender_id, receiver_id, amount);
if burned_amount > 0 {
log!("Account @{} burned {}", sender_id, burned_amount);
}
used_amount.into()
}
}