Support attaching signatures to transactions
jasonpaulos opened this issue · comments
Summary
This SDK has the ability to create a signed transaction given a private key using the SignTransaction
function from the crypto
package. However, we should also support use cases where the SDK does not have access the private key, such as if the key is on another system or stored in a hardware wallet.
We can support this by providing a function which creates a signed transaction based on an arbitrary signature, which can be computed elsewhere.
Scope
I propose creating the following new function in the crypto
package:
AttachTransactionSignature(tx types.Transaction, signer types.Address, signature []byte) (txid string, stxBytes []byte)
- Create a signed transaction using an existing signature. This would be very similar to the existing
SignTransaction
function, except it accepts the signature as an input. And ifsigner
is not the same as the sender of the transaction, theAuthAddr
field should be set on the signed transaction.
- Create a signed transaction using an existing signature. This would be very similar to the existing