一般是通过event来查看的

event mylog(uint code);
function test()
{
…
    mylog(0);
}
发起交易后，根据eth.getTransactionReceipt()检索，结果大致如下
{
“jsonrpc”:“2.0”,
“id”:1,
“result”:{
“blockHash”:“0xde5d1584b86db40a4ea64b8474f7b6d2c693f18ead347202f3c03a0d9904c672”,
“blockNumber”:“0x186f”,
“contractAddress”:null,
“cumulativeGasUsed”:“0x92e79”,
“from”:“0xe5684e632668d1bf0a84a60d98b3e7230695f568”,
“gasUsed”:“0x10531”,
“logs”:[
{
“address”:“0xee1b3f3a4e5f2b2d3029b6b65f3684e73b437447”,
“blockHash”:“0xde5d1584b86db40a4ea64b8474f7b6d2c693f18ead347202f3c03a0d9904c672”,
“blockNumber”:“0x186f”,
“data”:“0x0000000000000000000000000000000000000000000000000000000000000000”,
“logIndex”:“0x8”,
“topics”:[],
“transactionHash”:“0x58a16df942e3fb4f7d3476c9c8af05b95368960eb43cafdb9c3ecac1c4e0d59a”,
“transactionIndex”:“0x0”
}
],
“root”:“be061b18e7f402e4f1348e345316101c2939967ea5276564e0a698bc63c07de0”,
“to”:“0xee1b3f3a4e5f2b2d3029b6b65f3684e73b437447”,
“transactionHash”:“0x58a16df942e3fb4f7d3476c9c8af05b95368960eb43cafdb9c3ecac1c4e0d59a”,
“transactionIndex”:“0x8”
}
}

如果返回结果中log节点不为空，且data的值为0，则说明合约中的test函数执行成功了。