Custom Parity signer – programmatically unlock accounts for a certain time

Question

How can I implement a custom transaction signer (which will unlock accounts on the fly) and tell parity client to use it?

I don't want to unlock all accounts at startup (and always keep them unlocked. Instead, I want to set some logic for account unlocking on each transaction, say:

if (isDay && accountAddress in [addr1, addr2, addr3])
    unlockAccount and signTransaction
else
    rejectTransaction

I'm looking into JSONRPC signer module as a possible option, but not able to connect to the Parity Signer UI using websockets

Connect Error: Error: Server responded with a non-101 status: 403
Response Headers Follow:
x-frame-options: SAMEORIGIN
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
server: Parity/SignerUI
content-length: 524
content-type: text/html
connection: close

score 2 · Answer 1 · answered Apr 24 '17 at 10:56

2

Parity takes a command line option to keep certain accounts unlocked:

Example:

   --unlock 0x001fc7d7e506866aeab82c11da515e9dd6d32c25 --password password.txt

answered Apr 24 '17 at 10:56

Mikko Ohtamaa

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I don't want to unlock all accounts at startup. – Edward Ruchevits Apr 24 '17 at 10:57
@EdwardRuchevits then please clarify what you are looking for. – q9f Apr 24 '17 at 11:12
--unlock unlocks only listed accounts – Mikko Ohtamaa Apr 24 '17 at 11:13
@5chdn updated my question. – Edward Ruchevits Apr 24 '17 at 11:19
1

@MikkoOhtamaa And keeps them unlocked all the time. I don't want it. Please see my updated question. – Edward Ruchevits Apr 24 '17 at 11:20
@5chdn -> Use web3.personal.unlockAccount() with a timeout. See https://ethereum.stackexchange.com/a/12188/620 but @5chdn needs to clarify if Parity can unlock the account without the web ui. Geth does, but I am unsure about Parity. – Mikko Ohtamaa Apr 24 '17 at 12:03
Parity can do that, yes. – q9f Apr 24 '17 at 12:19
Looks like I need to use https://github.com/paritytech/parity/wiki/JSONRPC-signer-module for this. The expected flow is: tx is sent and pending confirmation (could be obtained using signer_requestsToConfirm?), signer_confirmRequest or signer_rejectRequest executed automatically. Not sure how to use it tho (updated my answer again). – Edward Ruchevits Apr 24 '17 at 12:24

score 1 · Answer 2 · answered Aug 10 '18 at 10:46

You can unlock an account via RPC.

curl --data '{"method":"personal_unlockAccount","params":["0x8f0227d45853a50eefd48dd4fec25d5b3fd2295e","hunter2",null],"id":1,"jsonrpc":"2.0"}' -H "Content-Type: application/json" -X POST localhost:8545

For details, see https://wiki.parity.io/JSONRPC-personal-module#personal_unlockaccount

Custom Parity signer – programmatically unlock accounts for a certain time

2 Answers2

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