blockchain - web3 - 使用metamask 调用某个contract 的方法

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refer to: https://ethereum.stackexchange.com/questions/25431/metamask-how-to-access-call-deployed-contracts-functions-using-metamask

// Get the contract instance using your contract's abi and address:
const contractInstance = web3.eth.contract(abi).at(contractAddress);

// Call a function of the contract:
contractInstance.someFunction({ from: sender, value: someValue, gas: limit },
  (err, res) => { /** do something with results **/ });

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