/**
*submitted for verification at etherscan.io on 2019-06-10
*/pragma solidity >=
0.5.0
;pragma experimental abiencoderv2;
// spdx-license-identifier: gpl-3.0
/// @title multicall - aggregate results from multiple read-only function calls
/// @author michael elliot
/// @author joshua levine
/// @author nick johnson
contract multicall
function
aggregate
(call[
] memory calls)
public
returns
(uint256 blocknumber, bytes[
] memory returndata)
}// helper functions
function
getethbalance
(address addr)
public view returns
(uint256 balance)
function
getblockhash
(uint256 blocknumber)
public view returns
(bytes32 blockhash)
function
getlastblockhash()
public view returns
(bytes32 blockhash)
function
getcurrentblocktimestamp()
public view returns
(uint256 timestamp)
function
getcurrentblockdifficulty()
public view returns
(uint256 difficulty)
function
getcurrentblockgaslimit()
public view returns
(uint256 gaslimit)
function
getcurrentblockcoinbase()
public view returns
(address coinbase)
}
//引入web3
const web3 =
require
('web3');
const web3 =
newweb3
('');
//部署合約的abi
const abi =[,
],"internaltype"
:"struct multicall.call"
,"name"
:"calls"
,"type"
:"tuple"}]
,"name"
:"aggregate"
,"outputs":[
,],"payable"
:false
,"statemutability"
:"nonpayable"
,"type"
:"function"},
],"name"
:"getblockhash"
,"outputs":[
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"},
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"},
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"},
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"},
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"},
],"name"
:"getethbalance"
,"outputs":[
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"},
],"payable"
:false
,"statemutability"
:"view"
,"type"
:"function"}]
;//部署到鏈上的合約的位址
const address =
'0xd573a1f062751a4f947f1769b5d78c1815420bf9'
;//通過new web3.eth.contract(abi, address)動態建立乙個合約例項
let mycontract =
newweb3.eth.contract
(abi, address)
;//getethbalance方法是合約中的方法，methods為調取合約方法的內建方法
mycontract.methods.
getethbalance
('0x88ded3010c9e9b2b2d1914b07c0d674281952d19').
call()
.then
(console.log)
;
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