[英]Calling a smart contract method using web3.js library
I am new to web3.js and I am trying to call a method from omesigo smart contract but I get a confusing error. 我是web3.js的新手,正在尝试从omesigo智能合约调用方法,但出现一个令人困惑的错误。 I have already read web3 doc and tried it.
我已经阅读了web3文档并进行了尝试。
package.json 的package.json
{
"name": "web3-learn",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"dependencies": {
"@babel/runtime": "^7.3.1",
"babel-cli": "^6.26.0",
"web3": "^1.0.0-beta.38"
}
}
node version: 10.15.0
index.js related lines: index.js相关行:
let contract = web3.eth.Contract(abi, address);
contract.methods.name().call((err, res) => {console.log(res)});
/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/node_modules/@babel/runtime/helpers/nonIterableSpread.js:2
throw new TypeError("Invalid attempt to spread non-iterable instance");
^
TypeError: Invalid attempt to spread non-iterable instance
at _nonIterableSpread (/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/node_modules/@babel/runtime/helpers/nonIterableSpread.js:2:9)
at _toConsumableArray (/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/node_modules/@babel/runtime/helpers/toConsumableArray.js:8:60)
at CallContractMethod.set (/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/node_modules/web3-core-method/dist/web3-core-method.cjs.js:405:34)
at MethodsProxy.executeMethod (/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/node_modules/web3-eth-contract/dist/web3-eth-contract.cjs.js:525:26)
at Function.anonymousFunction.(anonymous function) [as call] (/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/node_modules/web3-eth-contract/dist/web3-eth-contract.cjs.js:497:27)
at Object.<anonymous> (/home/amin/Documents/projects/solidity-workshop/solidity-learn/src/web3-learn/index.js:34:25)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:743:3)
It should print Omisego token name. 它应该显示Omisego令牌名称。 Thanks in advance for your help.
在此先感谢您的帮助。
I was experiencing the same error, and solved it by upgrading the Web3 library to "web3": "^1.0.0-beta.39"
我遇到了同样的错误,并通过将Web3库升级到
"web3": "^1.0.0-beta.39"
来解决了该错误"web3": "^1.0.0-beta.39"
Looking deeper into the error, it seems related to the deep cloning of contract.method arguments
. 深入研究错误,似乎与深度克隆
contract.method arguments
。 After a few hours of fruitless debugging, I stumbled upon the Web3 releases and saw that it was a featured release of beta.39
. 经过几个小时的徒劳无功的调试之后,我偶然发现了Web3版本,并发现它是
beta.39
的功能版本。 (released a day ago) (一天前发布)
I have been facing the same issue and the only difference from your approach is the version of web3 api, which for me is 1.0.0-beta.46. 我一直面临着相同的问题,与您的方法唯一的不同是web3 api的版本,对我来说是1.0.0-beta.46。 The resolution of the issue seems far fetched.
这个问题的解决似乎很牵强。
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