I am writing smart contract and I test on rinkeby network. I have issued about 18 ethereums from faucet. But after a short time, there are 2 strange transactions: one getting 15eth and one getting 3eth from my account. Here is transaction detail:



My address is: 0x627306090abab3a6e1400e9345bc60c78a8bef57. You can view my transaction detail here (from the time I issue 18eth): https://rinkeby.etherscan.io/address/0x627306090abab3a6e1400e9345bc60c78a8bef57

So, what is my problem here ? I afraid if "something wrong" and I don't know, I will lost more money on main network.



See https://github.com/trufflesuite/truffle/issues/686.

It looks like you used a well-known private key that's generated from a development tool called Truffle.

Because everyone already knows the private key, anyone can take ether put into that account.

If you need to know more, Google "0x627306090abaB3A6e1400e9345bC60c78a8BEf57" to find plenty of other discussion, e.g. https://www.reddit.com/r/ethereum/comments/7j8l5b/warning_i_sent_eth_to_my_metamask_account/?st=jidk6be8&sh=02499a0e.


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