Javascript 如何从js客户端调用Payment方法?
假设您有一个Javascript 如何从js客户端调用Payment方法?,javascript,rust,nearprotocol,Javascript,Rust,Nearprotocol,假设您有一个smart-contract方法,该方法要求在方法调用中附加押金,类似于rust方法: #[payable] pub fn spend(&mu self, age: u8){ assert!(env::attached_deposit() > 0, "Insufficient deposit."); . . . } 现在,您可以使用api js附近的设置合同,并继续调用它。如何调用此方法并在客户端js中将其附近附加一
smart-contract
方法,该方法要求在方法调用中附加押金,类似于rust
方法:
#[payable]
pub fn spend(&mu self, age: u8){
assert!(env::attached_deposit() > 0,
"Insufficient deposit.");
.
.
.
}
现在,您可以使用api js附近的
设置合同,并继续调用它。如何调用此方法并在客户端js中将其附近附加一些?您可以像往常一样设置合同:
const contract = await new nearlib.Contract(
walletConnection.account(),
nearConfig.contractName,
{
// View methods are read only. They don't modify the state, but usually return some value.
viewMethods: ["getCorgi", "getCorgisList", "displayGolbalCorgis"],
// Change methods can modify the state. But you don't receive the returned value when called.
changeMethods: ["transferCorgi", "createCorgi", "deleteCorgi"],
// Sender is the account ID to initialize transactions.
sender: walletConnection.getAccountId(),
}
);
通常,您将更改方法称为:
await contract.transferCorgi({"receiver": "frol.near", "id": "corgi_xxx", "message": "hello"})
但是,当您想要附加一些近标记或增加气体余量时,您需要指定:
注:
BN是一个大数字代表
默认气体容许量为300 TGA[300*10^12气体],了解更多信息:
金额以年环比指定(1年环比为10^24年环比)
例如:
const ONE_NEAR = new BN("1000000000000000000000000")
await contract.createCorgi({"id": "corgi_xxx"}, new BN("3000000000000"), ONE_NEAR)
const ONE_NEAR = new BN("1000000000000000000000000")
await contract.createCorgi({"id": "corgi_xxx"}, new BN("3000000000000"), ONE_NEAR)