Multisigtool consolidate multisig unspent

[iFoggz]

This is one tool I've created to consolidate multi-sig utxos and allow multiple wallets to sign it if need be. Currently we keep track of utxos for our large ones in foundation. We have been getting donations various ways such as side staking. This tool allows us to consolidate small utxos into a single larger one with ease.

Features:

• Scan a block range for utxos matching user choosen address
• Allow a max inputs to be set by user but have a firm max set in code to prevent hex transactions being longer then the rpc can handle in length
• Estimate the sizes and fees of the transaction before required signatures are needed to provide correct fees to miner of the block containing the tx.
• Support various multisig types of address: 2 of 3, 3 of 4, 3 of 5, 4 of 5
• Provide information about the utxos the rpc has found and amounts involved.

This creates a raw transaction with near calculations of the potential size of the hex and serialization of the transaction.

I've taken time to learn about the transaction hex formats and where I could make a good formula to buffer the byte size only a little for variances in serialization and hex process.

2 of 3 multisig test:

"Block Start": 1024100,
"Block End": 1024192,
"Amount of Inputs": 40,
"Total GRC In": 400.00000000,
"Fee": 120000,
"Output Amount": 399.99880000,
"Estimated signed hex size": 23862, (+132)
"Estimated Serialized size": 11931, (+66)

signed hex size is 23730
serialized size is 11865

---

3 of 4 multisig test:

"Block Start": 1024100,
"Block End": 1024192,
"Amount of Inputs": 30,
"Total GRC In": 300.00000000,
"Fee": 130000,
"Output Amount": 299.99870000,
"Estimated signed hex size": 24382, (+136)
"Estimated Serialized size": 12191, (+68)

signed hex size is 24246 
serialized size is 12123

---

3 of 5 multisig test:
Block Start": 1024100,
"Block End": 1024192,
"Amount of Inputs": 30,
"Total GRC In": 300.00000000,
"Fee": 140000,
"Output Amount": 299.99860000,
"Estimated signed hex size": 26422, (+128)
"Estimated Serialized size": 13211, (+64)

signed hex size is 26294
serialized size is 13147

-----

4 of 5 multisig test:
"Block Start": 1024100,
"Block End": 1024192,
"Amount of Inputs": 20,
"Total GRC In": 200.00000000,
"Fee": 110000,
"Output Amount": 199.99890000,
"Estimated signed hex size": 20582, (+144)
"Estimated Serialized size": 10291, (+72)

signed hex size is 20438
serialized size is 10219

As you can see the size is very close to the end result This will keep fees correct in most cases and in some cases cause a small fee increase for the transaction but this is pretty close without factoring the signatures in since we are just creating the raw transaction for the multisig key holders to sign.

I plan to make new tools in future to support the multisig addresses more and the future users of multisig on the network.

Let me know where you want changes. there is lots of commenting but I thought It would be important for those who go in the area understand the reasoning behind the code and calculations

[iFoggz]

as soon as this is pushed in i can then write the next tool in the multisig chest.

[jamescowens]

Looks good to me!

[cyrossignol]

Looks good. Great tool... It looks like this could implicitly support types where m == n (for example, 2-of-2) and other variations by calling it with a higher multi-sig-type, but the estimations will be a little off. I wonder if there's a generic way to express that...

For the future, though. This looks like it does the job for now.

[iFoggz]

u want support for 2 of 2 and 3 of 3? if you have alll private keys for a said address your wallet would pick it up and u can send funds like a normal transaction for a single address in wallet. it would show in balance and would show in inputs in coin control

[iFoggz]

heres a 3 of 3 in my wallet.