我正在尝试使用JavaScript在专用网络中创建ERC721令牌。
我可以通过松露控制台创建ERC721令牌,但通过JavaScript失败。
松露(开发)> myToken.mint()
{tx:'0xc1dc87a29fbe200ff180df67c01e454818feee433b13331c4ea9268624db077b', 收据:{blockHash: '0xf2ad0c70cda0efca3460ec74866ed61e77647493feb5edf2f81ad2a038c69956', blockNumber:251489,...
错误消息是
“ UnhandledPromiseRejection警告:未处理的承诺拒绝(拒绝ID:2):错误:无效的地址”
我的代码如下:
var Web3 = require('web3');
var BigNumber = require('bignumber.js');
var contract = require("truffle-contract");
var contractJson = require("./build/contracts/MyToken.json");
var MyToken = contract(contractJson);
Web3.providers.HttpProvider.prototype.sendAsync = Web3.providers.HttpProvider.prototype.send;
var web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider(web3Provider));
MyToken.setProvider(web3.currentProvider);
MyToken.deployed().then(function(mytoken) {
mytoken.mint();
}
在minting
之前需要其他内容吗?
答案 0 :(得分:0)
这是与您的代码一起使用的更新测试。
import re
s = 'For further details, please contact abc.helpdesk@xyz.com'
new_s = re.sub('[\w\.]+@[\w\.]+', lambda x:f'<a href="{x.group()}">{x.group()}</a>', s)
设置松露需要一堆样板。试试吧。
'For further details, please contact <a href="abc.helpdesk@xyz.com">abc.helpdesk@xyz.com</a>'
然后将其放入您的package.json
const NFToken = artifacts.require('NFTokenMock');
contract('NFTokenMock', (accounts) => {
let nftoken;
const id1 = 1;
const id2 = 2;
const id3 = 3;
const id4 = 40000;
beforeEach(async () => {
nftoken = await NFToken.new();
});
it('returns correct balanceOf after mint', async () => {
await nftoken.mint(accounts[0], id1);
const count = await nftoken.balanceOf(accounts[0]);
assert.equal(count.toNumber(), 1);
});
});
并运行mkdir tmp && cd tmp
。另外,我们还需要特殊的技巧才能使用所需的Solidity编译器版本(0.5.1)来获取Truffle:
{
"dependencies": {
"@0xcert/ethereum-erc721": "^2.0.0-rc1",
"truffle": "^5.0.2",
"web3": "^1.0.0-beta.37"
}
}
现在设置一个松露项目:
npm install
这是您的合同。将其保存到Contracts / nf-token-mock.sol:
(cd node_modules/truffle && npm install solc@0.5.1)
并将上面的测试文件保存到test / go.js。
如果幸运的话,请运行:mkdir contracts
echo > contracts/Migrations.sol <<EOL
pragma solidity ^0.5.1;
// Boilerplate required, https://github.com/trufflesuite/truffle/issues/1382
contract Migrations {}
EOL
mkdir Migrations
echo > Migrations/1.js <<EOL
// Boilerplate required, https://github.com/trufflesuite/truffle/issues/1382
module.exports = ($)=>{};
EOL
,您应该会看到
pragma solidity 0.5.1;
import "@0xcert/ethereum-erc721/src/contracts/tokens/nf-token.sol";
import "@0xcert/ethereum-erc721/src/contracts/ownership/ownable.sol";
/**
* @dev This is an example contract implementation of NFToken.
*/
contract NFTokenMock is
NFToken,
Ownable
{
/**
* @dev Mints a new NFT.
* @param _to The address that will own the minted NFT.
* @param _tokenId of the NFT to be minted by the msg.sender.
*/
function mint(
address _to,
uint256 _tokenId
)
external
onlyOwner
{
super._mint(_to, _tokenId);
}
}