m-tronweb/index.js

one node failure will use another node

const TronWeb=require('tronweb');
let txArg={
	feeLimit:1000*1e6
};

/*
 * 1.the name of the node
 * 2.the config
 * 3.the private key's key
 */
function MTronWeb(config,names,pkKey){
	this.tronWebMap=this.init(config,names,pkKey);
	this.nodeNames=names;
	this.nodeInsMap={};
}

/*
 * 初始化
 */
MTronWeb.prototype.init=function(config,names,pkKey){
	let tWMap={};
	if(pkKey=='event'){
		pkKey=pkKey+"_pk";	
	}else{ 
		pkKey="operator"+pkKey+"_pk";
	}
	for(let i=0;i<names.length;i++){
		let name=names[i];
		let tronWeb = new TronWeb(
			config[name+"_full"],
			config[name+"_solidity"],
			config[name+"_event"],
			config[pkKey],
		);
		tWMap[names[i]]=tronWeb;
	}
	return tWMap;
}

/*
 * 1.name of node,ins
 * 2.using the node from the begining
 */
MTronWeb.prototype.query=async function(contractAddr,funcName,args){
	let ins;
	let rs;
	for(let i=0;i<this.nodeNames.length;i++){
		try{
			ins=await this.getContractIns(this.nodeNames[i],contractAddr);			
			rs=await ins.methods[funcName](...args).call();
		}catch(e){
			console.log(this.nodeNames[i]+" 异常，跳过");
			continue;
		}
	}
	return rs;
}

/*
 * 只是执行一次，对于比如转钱这种，我们无法接受一直去执行
 * 执行完毕，返回交易ID
 */
MTronWeb.prototype.execute=async function(contractAddr,funcName,args){
	let ins;
	let txId;
	for(let i=0;i<this.nodeNames.length;i++){
		try{
			ins=await this.getContractIns(this.nodeNames[i],contractAddr);
			console.log(ins);
			console.log(ins.methods[funcName]);
			console.log(ins.methods[funcName](...args));
			txId=await ins.methods[funcName](...args).send(txArg);	
		}catch(e){
			console.log(e);
			console.log(this.nodeNames[i]+" 异常，跳过");
		}
	}
	return txId;
}


/*
 * 1.nodeName already install
 */
MTronWeb.prototype.getContractIns=async function(nodeName,contractAddr){
	let insMap=this.nodeInsMap[nodeName];
	let ins;
	if(insMap){
		ins=insMap[contractAddr];
		if(ins){
			return ins;
		}
	}else{
		insMap={};
	}
	let tronweb=this.tronWebMap[nodeName];
	ins=await tronweb.contract().at(contractAddr);
	insMap[contractAddr]=ins;
	this.nodeInsMap[nodeName]=insMap;
	return ins;
}

module.exports=MTronWeb;