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Execute the Contract

This article would like to provide a brief Counter example to demonstrate how to use a dapp:sendTransaction method to send transactions to smart contracts distributed by networks.

The Counter example has increment and reset methods while the implementations are different for each network.

The following is a straightforward example of the Solidity pseudocode.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

contract Counter {
   int private count = 0;

   constructor(uint256 _count) {
  count = _count;

   function increment(uint256 _count) public {
       count += _count;

   function reset(uint256 _count) public {
       count = _count

The following formats are frequently used for communication with smart contracts: TRANSACTION PARAMETER refers to the value of turning the transaction into a string type, and the parameters CHAIN NAME and TRANSACTION PARAMETER are transferred.

The transaction is sent by WELLDONE Wallet by getting the pattern translated into a string type as shown below because each network has a unique transaction format.

type CHAIN_NAME = 'ethereum' | 'cosmos' | 'near' | 'solana' | 'klaytn' | 'celo' | 'neon';

const response = await dapp.request(CHAIN_NAME, {
method: 'dapp:sendTransaction',
const txHash = response.hash;

Each chain section below explains how each network can communicate with the contract.