[Ethereum] send raw transaction without knowing nonce

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I want to send raw transactions but I don't want to accidentally overwrite any transactions.

Afaik when using eth.sendTransaction it automatically increments the nonce and doesn't overwrite any transactions (is the node keeping track of the nonce here?). Now I have a script that sends raw transactions to a node (no account listed there for security reasons, obviously).

Is there a way to automatically append transactions without knowing the nonce or accidentally overwriting transactions? Or do I have to keep track of the nonce myself?

Best Answer

The nonce is part of the transaction data, so it contributes to the transaction hash, which is what you sign with the private key.

So you need to know the nonce you want to use before signing the transaction.

Related Solutions

[Ethereum] How to set the nonce for raw transactions

A raw transaction is the RLP encoded value of a signed transaction, i.e. everything included as defined by the yellow paper page 4, section 4.2
Nonces must already be included in the raw transaction, you cannot set it. Geth does not set it. (Since the signature that is also included is based on it).
Not as far as I know.

[Ethereum] Transaction nonce management

You're correct that all subsequent transactions would be refused.

So with Geth, you can rebroadcast with a higher fee (gas price) by using eth.resend (the nonce will remain the same).

eth.resend(tx, optional gas price, optional gas limit)

Example:

eth.sendTransaction({from: eth.accounts[0], to: "...", gasPrice: "1000"})
var tx = eth.pendingTransactions[0]
eth.resend(tx, web3.toWei(20, "GWei"))

Best Answer

Related Solutions

[Ethereum] How to set the nonce for raw transactions

[Ethereum] Transaction nonce management

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