Ethereum: Ethersjs: Calling a method in a smart contract: nonce has already been used, Nonce too low
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Etherreum: Ethers.js – Method Calling In Intellectual Agreement
Whoreum -based intellectual contracts, one of the most important concerts that needs to be understood is wrong. Nonsee (a short “number”) is Uni Equie indefinitely for any request under the contract. In this article, we will investigate the Holl to be invited to be a Smart method using Ethers.js and Node.js.
after Nonce
Before we dive into the code, let’s quickly look at Nonce’s basics. Sitting is used to save repeat attacks. The repetition of the attacker’s Ocurs Whites is trying to carry several times with Smeme input with Smeme input, mixing with the contract. By adding value to each query, we are prevention of this type of attack.
Create a contract and provider *
Throw your smart method using Ethers.js, you will need a new one to create your Ethereum network. This channel will be performed to sing “Ether Library”, which allows us to communicate with Ethereum Blockchain.
`Ovasscript
CONST = Require (“Ether”);
// Create a new instance of Ethereum provider
Continue employees = neutral.
Gaspeal: eticals.towei (’20’, ‘game),’ game), ‘
^)
`s
Change your_preict_id yuit for your infusor ID.
Method Calling *
Nowt, available specimens, you can use it to call the Smart in Cit method. Examine, let's go because you pay the toll Ghetowner () Method defined tolls:
Ovasscript
/// import ‘Els.js.js.js’ from the library and your contract both (address)
CONST {Ether} = Require (‘Ethers’);
Const MyContract = Artifacts.require (‘./ MycyContract’);
Syconction is mani () {
// Get an instance of a contract with a province
Concert = Wait for MyContract.deployed.Deployed ();
// CAL TIMING WITH SEE OBS arguments
const ost ost = wait for the contract.Getwner ();
console.log (world); // should print:
// Hou can use a sketch to perform a shrinkage function
Consult = waiting for the contract.call (‘goodowner’, {floom: ‘yur_actan_adress’});
Console.log (result.Value); // should print: Your_Value_Value
// Dou can use ice for leisure for events with contractor
ect.on (‘getownership’, (owner) => {
console.log (world);
^)
Delivere is ()
}
`s
In this exam, we will create a new example of Hort Smart using MyContract artifact. We use the service provider to catch the "get") time in the agreement.
NONCE PASSE
Assytho Toe Earlle, Nonce is to prevent repeating to repeat against secret contracts. Ilfing's attempt at the car threw meh meth time when with with with with with with input, probably because the Royal Royers in the valley were already witty or smelled.
You can use the Shore.js Library after solving this problem. This allows you to set the gas limit for your operation. See how you can change the previous exam:
Ovasscript
Consult = field.cait.call (‘getowner’, {flood: ‘yur_ccount_address’, gas: 100,000,000, meaning: Vales.tolles.toilet: helpers.towei (‘1’, ‘ether’)});
“ s
During this exam, we add an argument for 1 thousand (or anonym or other validity) and determine the value of the operation “Oneee Ice”.
* Conclusion
Calling the method we intelligently use Ethers.js is a relatively stinging sting. You can eat Smart Smart Smart Smart Etheretum with a gas source and a gas source for a gas source.