I want to build a transaction without signing it. This might be useful for:
- estimating transaction fees;
- simulating the transaction.
I don’t want to sign the transaction and send it to simulation, because, in that case, the http request might be intercepted and the signed transaction might be used by a fraud.
The easiest example of a transaction to build is transfer. Here is how transfer transaction is constructed in fuels-rs:
There is a line responsible for adding a signature:
I’ve tried to duplicate this code for building the transaction and removed the line with
add_witnessses. But it turns out that
ScriptTransactionBuilder.build function expects all signatures to be present. I get the following error:
InvalidData("signature missing for coin with owner...")
Is there a way to construct a transaction without signatures?
PS: in fuels-ts it is possible
In the transfer implementation the signing is done inside
sendTransaction method. But the construction of the transaction request without signing it is totally valid:
fuels-ts/packages/wallet/src/account.ts at 166a48bb45b35fa5295ddce20d1f6e256b133a67 · FuelLabs/fuels-ts · GitHub