nodejs开发EOS转账服务的两种方案分别是什么

const rpcUrl = 'http://jungle2.cryptolions.io:80'
const { Api, JsonRpc, RpcError, JsSignatureProvider } = require('eosjs');
const ecc = require('eosjs-ecc');
const fetch = require('node-fetch');
const { TextDecoder, TextEncoder } = require('text-encoding');
const rpc = new JsonRpc(rpcUrl, { fetch });
 //转账操作 转账到账户accountName 'eosaccountb2';转账数额quantity '1.1234 EOS'
async function transfer(accountName,quantity) {
	let signatureProvider = new JsSignatureProvider([pkeys[0].privateKey]);
	let api = new Api({ rpc, signatureProvider, textDecoder: new TextDecoder(), textEncoder: new TextEncoder() });
	let result = await api.transact({
		actions: [{
			account: 'eosio.token',
			name: 'transfer',
			authorization: [{
				actor: pkeys[0].actor,
				permission: 'active',
			}],
			data: {
				from: pkeys[0].actor,
				to: accountName,	//提现地址
				quantity: quantity, //提现数量
				memo: '',
			},
		}]
	}, {
		blocksBehind: 3,
		expireSeconds: 30,
	});
	console.dir(result); 
};

async function transfer() {
	try {
		let actor = "eosaccountaa"
		let transferTo = "eosaccountbb"
		let quantity = "1.1234 EOS"
		let memo = "hi heere"
		let blocksBehind = 3
		let expireSeconds = 100

		let info = await rpc.get_info();
		if (info != null && info.chain_id != null && info.head_block_num != null) {

			let chain_id = info.chain_id;
			let head_block_num = info.head_block_num - blocksBehind;

			let block = await get_block(head_block_num);

			if (block != null && block.ref_block_prefix != null && block.timestamp != null) {

				let data = await abi_json_to_bin(actor, transferTo, quantity, memo)

				if (data != null) {
					let transactions = {
						"max_net_usage_words": 0,
						"max_cpu_usage_ms": 0,
						"delay_sec": 0,
						"context_free_actions": [],
"actions": [{
							"account": "eosio.token",
							"name": "transfer",
							"authorization": [{
								"actor": actor,
								"permission": "active"
							}],
							"data": data
						}],
						"transaction_extensions": [],
						"expiration": ser.timePointSecToDate(ser.dateToTimePointSec(block.timestamp) + expireSeconds),
						"ref_block_num": block.block_num & 0xffff,
						"ref_block_prefix": block.ref_block_prefix
					};

					let signTransaction = await sign_transaction(transactions, ["EOS61VncKc7P8MhKzz8K7s3kAeNxFsp5ZQGoVFbLjRh2NVR1B6D9Z"], chain_id);

					if (signTransaction != null && signTransaction.signatures != null) {
						var transaction_detail = await push_transaction(transactions, signTransaction.signatures);
						console.log('push_transaction=transaction_id==' + transaction_detail.transaction_id);
					}

				}
			}
		}
	} catch (e) {
		console.log(e)
	}

}