mimblewimble-py

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mimblewimble-py

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Pure Python implementation of Mimblewimble protocol for Grin cryptocurrency

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# Mimblewimble in Python

![mimblewimble-py logo](https://github.com/grinventions/mimblewimble-py/blob/main/assets/logo.png?raw=true)

We are building the first Python-based implementation of the Mimblewimble protocol for the [grin cryptocurrency](https://grin.mw/). At the moment it is at the most early stage of development. Heavily based on the [grin++ wallet](https://github.com/GrinPlusPlus/GrinPlusPlus).

## Scripts

- Node persistence adapters and related utilities are documented in [scripts/README.md](scripts/README.md).

## Usage

### Generating wallets

Simplest operation is simply make a new wallet

```python
from mimblewimble.wallet import Wallet

# instantiate the wallet
w = Wallet.initialize()

# derive the slatepack address and the recovery phrase
path = 'm/0/1/0'
slatepack_address = w.getSlatepackAddress(path=path)
recovery_phrase = w.getSeedPhrase()

# display  the output
print('Your slatepack address at the path {0} is'.format(path))
print(slatepack_address)
print()
print('Your recovery phrase is')
print(recovery_phrase)
```

it will respond

```
Your slatepack address at the path m/0/1/0 is
grin14xfltfnzfq68mc6k7xru469h2x0ejckzr7alczcjf2wml755qnuq8c0zkx

Your recovery phrase is
mammal scale present develop then tail identify movie pizza brisk entry regret match solve coffee empower double muffin curious virtual joy hen diagram vacuum
```

### Restoring wallet from the recovery phrase

You may restore the wallet from the recovery phrase as follows

```python
from mimblewimble.wallet import Wallet

# content of the core wallet encrypted seed file
recovery_phrase = 'sign interest obtain raw window monster jump bring nice crunch toward grunt prosper recycle sphere battle mother fold reject velvet emotion similar romance govern'

# instantiate the wallet
w = Wallet.fromSeedPhrase(recovery_phrase)

# derive the slatepack address and the recovery phrase
path = 'm/0/1/0'
slatepack_address = w.getSlatepackAddress(path=path)

# display  the output
print('Your slatepack address at the path {0} is'.format(path))
print(slatepack_address)
```

it will respond

```
Your slatepack address at the path m/0/1/0 is
grin14kgku7l5x6te3arast3p59zk4rteznq2ug6kmmypf2d6z8md76eqg3su35
```

### BIP39 Password-Protected Seed (Passphrase)

The wallet supports [BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki) passphrase protection, which adds an optional password (sometimes called a "25th word") to the mnemonic recovery phrase. This provides an extra layer of security and enables **plausible deniability** — the same mnemonic phrase with different passphrases will derive entirely different wallets.

#### How it works

1. A standard 24-word mnemonic is generated from random entropy
2. The mnemonic and an optional passphrase are fed into **PBKDF2-HMAC-SHA512** (2048 iterations) with the salt `"mnemonic" + passphrase`
3. This produces a 64-byte BIP39 seed
4. The BIP39 seed is then passed through **HMAC-SHA512** with the Grin-specific key `"IamVoldemort"` to derive the master key
5. All wallet keys (private keys, ED25519, slatepack addresses) are derived from that master key via BIP32

Using no passphrase (empty string) is equivalent to standard mnemonic behavior, so existing wallets are unaffected.

#### Creating a wallet with BIP39 passphrase

```python
from mimblewimble.wallet import Wallet

# create a wallet with passphrase protection
w = Wallet.initialize(bip39_passphrase='my secret passphrase')

# the recovery phrase alone is NOT enough to restore this wallet
# you must also remember the passphrase
path = 'm/0/1/0'
slatepack_address = w.getSlatepackAddress(path=path)
recovery_phrase = w.getSeedPhrase()

print('Your slatepack address at the path {0} is'.format(path))
print(slatepack_address)
print()
print('Your recovery phrase is')
print(recovery_phrase)
print()
print('Remember: you need BOTH the recovery phrase AND the passphrase to restore this wallet!')
```

#### Restoring a wallet with BIP39 passphrase

```python
from mimblewimble.wallet import Wallet

recovery_phrase = 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art'

# restore with the same passphrase used during creation
w = Wallet.fromSeedPhrase(recovery_phrase, bip39_passphrase='my secret passphrase')

path = 'm/0/1/0'
slatepack_address = w.getSlatepackAddress(path=path)

print('Your slatepack address at the path {0} is'.format(path))
print(slatepack_address)
```

#### Plausible deniability

The same mnemonic with different passphrases produces completely different wallets. This allows you to maintain a "decoy" wallet with a small balance (using an empty or simple passphrase) alongside your real wallet (using a strong passphrase). Under duress, you can reveal the decoy passphrase without exposing the real wallet.

```python
from mimblewimble.wallet import Wallet

phrase = 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art'

# no passphrase — standard wallet (could be your decoy)
w_decoy = Wallet.fromSeedPhrase(phrase)

# with passphrase — completely different wallet
w_real = Wallet.fromSeedPhrase(phrase, bip39_passphrase='correct horse battery staple')

path = 'm/0/1/0'
print('Decoy address:', w_decoy.getSlatepackAddress(path=path))
print('Real address: ', w_real.getSlatepackAddress(path=path))

# These are two entirely different wallets derived from the same mnemonic
```

#### Using KeyChain directly

You can also use the lower-level `KeyChain.fromMnemonic()` method directly for key derivation:

```python
from mimblewimble.keychain import KeyChain

mnemonic = 'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art'

# derive keychain without passphrase
kc_default = KeyChain.fromMnemonic(mnemonic)

# derive keychain with passphrase
kc_protected = KeyChain.fromMnemonic(mnemonic, passphrase='my secret')

# these produce different master keys and different slatepack addresses
print('Default address:  ', kc_default.getSlatepackAddress())
print('Protected address:', kc_protected.getSlatepackAddress())
```

### Restoring wallet from the encrypted seed

Fully compatible with seed generated by the core wallet

```python
from mimblewimble.wallet import Wallet

# content of the core wallet encrypted seed file
seed = {
    'encrypted_seed': '839773da8062af7dc51714fd98a7f9a72750e17aa54541d5317b5ea1be5c5751db85497aa630380dd984e2ecd603ae0b',
    'salt': '356f045acf2b2787',
    'nonce': 'b5a490e1c942e6a5147bb740'
}

# convert to bytes
encrypted_seed = bytes.fromhex(seed['encrypted_seed'])
nonce = bytes.fromhex(seed['nonce'])
salt = bytes.fromhex(seed['salt'])

# don't forget your password
password = 'grinventions'

# instantiate the wallet
w = Wallet(encrypted_seed=encrypted_seed, nonce=nonce, salt=salt)

# decrypt
w.unshieldWallet(password, nonce=nonce, salt=salt)

# derive the slatepack address and the recovery phrase
path = 'm/0/1/0'
slatepack_address = w.getSlatepackAddress(path=path)
recovery_phrase = w.getSeedPhrase()

# display  the output
print('Your slatepack address at the path {0} is'.format(path))
print(slatepack_address)
print()
print('Your recovery phrase is')
print(recovery_phrase)
```

it will respond

```
grin14kgku7l5x6te3arast3p59zk4rteznq2ug6kmmypf2d6z8md76eqg3su35

Your recovery phrase is
sign interest obtain raw window monster jump bring nice crunch toward grunt prosper recycle sphere battle mother fold reject velvet emotion similar romance govern
```

### Detecting invalid password

While the master seed is being encrypted, the MAC tag digest will be verified indicating if password was correct.

```python
from mimblewimble.wallet import Wallet

# convert to bytes
encrypted_seed = bytes.fromhex(seed['encrypted_seed'])
nonce = bytes.fromhex(seed['nonce'])
salt = bytes.fromhex(seed['salt'])

# don't forget your invalid password
password = 'Lt. Col. Frank Slade'

# instantiate the wallet
w = Wallet(encrypted_seed=encrypted_seed, nonce=nonce, salt=salt)

# decrypt
valid = True
try:
    w.unshieldWallet(password, nonce=nonce, salt=salt)
except Exception as e:
    if str(e) == 'MAC check failed':
        valid = False
if valid:
    print('Password correct!')
else:
    print('Password invalid!')
```

it will indicate failure of verification of the MAC tag

```
Password invalid!
```

### Building coinbase

```python
from mimblewimble.wallet import Wallet

# instantiate the wallet
w = Wallet.initialize()

# pick path and amount
coinbase_path = 'm/0/1/0'
coinbase_amount = 60

kernel, output = w.createCoinbase(coinbase_amount, path=coinbase_path)

# display  the output
print('Kernel')
print(kernel.toJSON())
print('Output')
print(output.output.toJSON())
```

it will output something like

```
Kernel
{'features': {}, 'excess': '0927759d4f4fc554e148f1906166381b6c1889895c6f96c3e2e76c55c9e219848b', 'excess_sig': ''}
Output
{'features': 1, 'commit': '098dcf471cf019030c82044cee5e794b0e31d11e00567920d8e5a40103eb63071f', 'proof': '00000000000002a352184e4a3f6dc6c75b447c3228a3202ac1c8a54d259a8441c89aea9b8bc6d9c820f71e8a5a567266e985071ea585cbee1808add28949695f416041d979685d4608b011d3594cc2437f1dff7d37653110f44328d8f7238cd414cbd314d424cbaa14b75e5df5dfb6f7627c0cf88516fea9a6c9f4a78702adf04f973027364ff5ff1c266115f6426230d268ee0437b17db66c769afce8f4af169d8a4394382fddc20ec4f6db705fc8f0c62cf27b28b965c0865609b7570d61a490a702ebef7e47f5b0c0150b88b276dd7aa34b273fe03972ae56d6bf9ca2e08a9dc13b556ff39ab1a6e756b49258e7a98c09e545e404cc676f891172d06844525ac709af135f4ff96d33d24522fd2274b49a955fe733069e45057e6b7a6cbd5f6afe8aa532b33bbbead86932d5563e4197da22077aa7c1271e09412ce6cd7e5be6ea7e52e335a50e34eea38f05bf389690c2a10c6313b9de376bcc95c5a306c4e4b418a0484fa7c124260019558b9b0507cdfcdbaeead4f51e1c727ec08ae4d8855b0a81b00afa03f48d0c484ed7ed0226a5f39076a31dd2369724d870d227b0e7f0822ac2eb1add54c6e3a37dd62dbf4cf6b6890f9881852a40c6a849ffaa1172aa941a0a9fb34f110e5d9f0695d058f4fe6a1b5202758c520e77f318e47fbd2eaed55d4320e0fb9c0b0cbdfaaed051c24c1bfa7aa565ff5df81ca434e03d392df1da255a7e877ec2d4cf8cec0f366bf3fa45738900d92c4e330e9ae586306c5b03f9d65068f884927a8102337f95ae6be17a72975b9d0ba134f41ef9c331d8e8da1fb1d30e8f722e8e9bc2a789f532c04529cdb31332bd5cb21d4d3a8ccd66b2635a797e930df87389a6b67d71a525d6ed5b57a413fa29e558d8ece38a09b69350943a5e681eedbfbe907b4b0e9ae9a0daa470d500866a2cda57a2840c959b2f4992e1573d2b91c25186'}
```

### SRS transaction building

```python
from mimblewimble.wallet import Wallet

# instantiate two wallets wallet
alice_path = 'm/0/1/0'
alice_wallet = Wallet.initialize()
alice_address = alice_wallet.getSlatepackAddress()

bob_path = 'm/0/1/0'
bob_wallet = Wallet.initialize()
bob_address = bob_wallet.getSlatepackAddress()

print('Alice: ', alice_address)
print('Bob:   ', bob_address)

# Alice makes 60 coins coinbase output
coinbase_amount = 60000000000
kernel, output = alice_wallet.createCoinbase(
    coinbase_amount, path=alice_path)

# attempts to send 30 coins to Bob
num_change_outputs = 1
amount = 30000000000
fee_base = 7000000
block_height = 99999
send_slate, alice_secret_key, alice_secret_nonce, change_outputs = alice_wallet.send(
    [output], num_change_outputs, amount, fee_base, block_height,
    path=alice_path, receiver_address=bob_address)

print()
print('send slate from Alice')
print(send_slate.toJSON())

# build the receive slate using Bob's wallet
receive_slate, bob_secret_key, bob_secret_nonce = bob_wallet.receive(send_slate)

print()
print('receive slate from Bob')
print(receive_slate.toJSON())

# finalize the receive slate using Alice's wallet
finalized_slate = alice_wallet.finalize(
    receive_slate, path=alice_path)

print()
print('finalized slate that Alice has')
print(finalized_slate.toJSON())
```

expect output of the form

```
Alice:  grin1rn9jvtzlffsk4dht29nqtw8ja65r749jvmcm3833kadt76dajr4qra9e6m
Bob:    grin18gxjdmmq53fpx9330atjqs8x3tc7jw6dcthe043pzrr9d2nletqsnt3pu9

send slate from Alice
{'amt': 30000000000, 'sta': 'S1', 'off': 'a18fa6bfd76257149e449bd8bd816a4ce3de8af539a794f937c1d39dc78b771e', 'fee': 322000000, 'coms': [{'c': '09ea9b319f2bbf94eb21f8e996e42fb2c2968e939bf18e8acdbd4192546df16296', 'f': 1}, {'c': '09e17a9b2eed70ef1438a449f9c89eb7a795a71c3e0f398bf5f13b6c8a814aaac0', 'p': '00000000000002a320a4e80ea09225153b9230859f1e0c3a637501efbbde25c6fd6ef01ae62294164b437a8b895b9db7ebe9081c49fb26a7d69cd3c40a0609b28c78b4e7637c7523044d81198c3044bbedb4f069086bdfc14530740290efe51be45c2bad65500993f88c6ab3273d40633a6a51aebdb150b3b33ebeb8b19e46524949aeb4af246e44e80a326af52e22e952a4c23a285bd3c3ad5aae325c3f891ade0b4630bf55bbde56c8a53dc571e7b59863b7f689027466784af112509900bf821f8830d061b2ffa2812d47122e8e7dc3f0be6b596121f3a858bf9a69c658787776f6af691bd817c5f31d2910a11e4d7737b2247b1a64eb4a5f6d5083ead8eb2e9706bde1c5463ecc7042be326554dea8e2db20d28f4e6c41550ff9c463ded09d034e9d82324fbe4592bac6f69e3eaf22291b0fbd74faba1fe194881cfe8ba3997213ce3ec8011a7d984742480b1464b4d88e074ebb4a68b0a529941819a6da3a2fe9efaed11890cb63007166751da04e00ebd3110ac8b8084f75505df1617681154a9530f117c59661e8e5533595058ff0fc202035f9aa19493195b96682b5a357a18faee8139c52365c5a42b9f4ee2ac964a2861dd7a88a8a5a58be86eb46e1c76ae30d3e681532117162ea084e41a7aca289373f8008e1a558620ec1d67d639d0480900927c725422593ae7f2ff2d554317c9fca496ce955fd784bc93c124a95415bd3c47011449bf88635e6492a5b9bada3ef970cfd5941f56f5aa82aa044aa314623bc4bcea8d4e90e56c0d403d934d8b321244fdf2ba31ba853a039281a19882eb5fdcbdd2ac8861bd8570971d81a5ff5bf4c293c821174c5f220a887e5a559c116a7c1afe2b2d5081a177e327a1d161af226be8e95f6dd8098b52c989f72920001ca1deb676f50330da8f0a7685b85c31644399b4c8351ac1d7febca3382c64a19d8e4a39af59f'}], 'proof': {'saddr': '1ccb262c5f4a616ab6eb516605b8f2eea83f54b266f1b89e31b75abf69bd90ea', 'raddr': None, 'rsig': None}}

receive slate from Bob
{'amt': 30000000000, 'sta': 'S2', 'off': '84b02f977be855ca2a748362aa535da833a4bb7786ac7263e880f1d9b00ac3fb', 'fee': 322000000, 'coms': [{'c': '09ea9b319f2bbf94eb21f8e996e42fb2c2968e939bf18e8acdbd4192546df16296', 'f': 1}, {'c': '09e17a9b2eed70ef1438a449f9c89eb7a795a71c3e0f398bf5f13b6c8a814aaac0', 'p': '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'}, {'c': '092540d07c1dde2de274ac14f0e42d6e542851c3e7bbb0987b19354b9999800aa1', 'p': '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'}], 'proof': {'saddr': '1ccb262c5f4a616ab6eb516605b8f2eea83f54b266f1b89e31b75abf69bd90ea', 'raddr': '3a0d26ef60a4521316317f572040e68af1e93b4dc2ef97d62110c656aa7fcac1', 'rsig': '35392393ba925f976c9fee85424489a9d6116f1a1a4547d133056a39215714902d172a1ea8b3271929fdf6ae981ae7ec264095fd98300f9ced73be50644f500d00000006fc23ac0008aae8f9a55ebbc33f5b13ba1c9eadd4218a514360c4d9c10be9c9b681e8d86ccb1ccb262c5f4a616ab6eb516605b8f2eea83f54b266f1b89e31b75abf69bd90ea'}}

finalized slate that Alice has
{'amt': 30000000000, 'sta': 'S3', 'off': '84b02f977be855ca2a748362aa535da833a4bb7786ac7263e880f1d9b00ac3fb', 'fee': 322000000, 'coms': [{'c': '09ea9b319f2bbf94eb21f8e996e42fb2c2968e939bf18e8acdbd4192546df16296', 'f': 1}, {'c': '09e17a9b2eed70ef1438a449f9c89eb7a795a71c3e0f398bf5f13b6c8a814aaac0', 'p': '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'}, {'c': '092540d07c1dde2de274ac14f0e42d6e542851c3e7bbb0987b19354b9999800aa1', 'p': '00000000000002a3beaced67b4c66ff1d446fa3413cc8caa8ca717e0456d77eb57631d7e5a10995a35c81008965ace1c29e5b9e7535f4320d907699a1ebfe005c33106a1c90e89c701f96cb8a7c5c72b421db1a3b189979bfe042293f0582e9d7aa6520c0a95d9df98a0f75e6adf914bb3b9a8bf34fbddeae0f6b8e64c9bdf1bcf0aad51dbb7cb34ce3fca3057f16fdd6d10d9980f6360e5d99f358daf17ef5689d565d1bc64ae9ac21ead036a5f6602be3a274fe6c16ace3ce467839a6bdd0d8006d47ea67d0a5df8b178e7de1baeb13e95fbfae9b8b71bb8914427376e31c843d642143ac41f682acb92b30f32f5ae426daab93a2a2e60d5b5326fa830f65bcfb7dbbc71c8b59866830c2a739e3eaec6339994cd42ce13cf6400e29e7c7251f67b605e356e3bf3d9d27f73b0f361e09fdef9c51f065b1c3b0d9d6afe782d7c00d321fa034620d24643149ac2e2c3d499df4c3487ec39885102d286a7f07f4e5fd4c70788f9f24147eb02a4b0e486fd3b22dcd09eccb0efe6e1a7e90089ce5afd27d67d32ba68d8cd3a906eaacda55d1792081c372bd0f695a94cad62b07c817ff3328e3dbbe0bf832139fac3d04016fb7f6cb77de9ba22435c74d28ad4c340e2593eb01280a55e80f31b633a96009239e512f66415ddc06c4e85e0d26c0bbe2c33b4e97010ec69ea2e95b0f388f5529f57ad96d37f45da06f7f43ead8ad71fb48da3a1a028c24c410094420b1651ecd233f344ea3cc51d7cb84f91c33c3993d39199987965d7c6f1f26969cc35486bea243ce9f5084423443580e9252155f17a21742919fd3e379fe31abd173939b15ef181c37e8b68f13fa45f8d513f0d0475306c12cfa5d7871ecb794347413088fc91cdefd0553188e9a1d2b9a464d82b95867af81cf76fc56e0a1eddf82550c0a6b30a3eac462abcc78c287e8e66b1cd6950cf36c8ef68e6df3d1b'}], 'proof': {'saddr': '1ccb262c5f4a616ab6eb516605b8f2eea83f54b266f1b89e31b75abf69bd90ea', 'raddr': '3a0d26ef60a4521316317f572040e68af1e93b4dc2ef97d62110c656aa7fcac1', 'rsig': '35392393ba925f976c9fee85424489a9d6116f1a1a4547d133056a39215714902d172a1ea8b3271929fdf6ae981ae7ec264095fd98300f9ced73be50644f500d00000006fc23ac0008aae8f9a55ebbc33f5b13ba1c9eadd4218a514360c4d9c10be9c9b681e8d86ccb1ccb262c5f4a616ab6eb516605b8f2eea83f54b266f1b89e31b75abf69bd90ea'}}
```

### Deriving TOR addresses

You may use `mimblewimble-py` to convert grin address to .onion address, which is useful in checking if wallet is reachable.

```python
from mimblewimble.helpers.tor import TorAddress
from mimblewimble.keychain import KeyChain

slatepack_address = 'grin1m3ckuft0llw97ulzmedk557twyn76wkgxartn6lpfq5xd9wcc24qnpwde5'

# ed25519 public key from slatepack address
ed25519_pk = KeyChain.slatepackAddressToED25519PublicKey(slatepack_address)

# ed25519 public key to .onion address
onion_address = TorAddress(ed25519_pk).toOnion()

assert onion_address == '3ryw4jlp77of647c3znwuu6loet62owig5dlt27bjaugnfoyykvneayd.onion'

# you can also validate the .onion address
# it will check if ed25519 public key is a valid curve point
# and also if checksum is correct, only V3 TOR addresses are supported!
TorAddress.parse(onion_address)

print(slatepack_address)
print(onion_address)
```

outputs

```
grin1m3ckuft0llw97ulzmedk557twyn76wkgxartn6lpfq5xd9wcc24qnpwde5
3ryw4jlp77of647c3znwuu6loet62owig5dlt27bjaugnfoyykvneayd.onion
```

you may use TOR proxy to reach foreign API listener under `3ryw4jlp77of647c3znwuu6loet62owig5dlt27bjaugnfoyykvneayd.onion` to check if wallet is listening.

## Expected features

* Managing blocks
* Managing transactions

## Contributing

### Setup

Install dev dependencies using

```sh
pip install ".[dev]"
```

Make sure tests are passing using

```sh
pytest
```

and run linter from the root of this repo

```sh
black .
```

to ensure your changes match the coding style. This also minimizes diffs which result from IDE configuration.

## Use-cases

* Implement python-based wallets and nodes for [grin](https://grin.mw/)
* [Research](https://forum.grin.mw/c/research/11) new protocols, quickly drafting ideas and testing them
* Have [grin](https://grin.mw/) codebase that anyone can easily understand and translate to other languages

## Useful docs

1. Regarding serialization/deserialization [p2p protocol document](https://github.com/mimblewimble/docs/wiki/P2P-Protocol#compactblockbody)

## Tools

1. [Python's BIP32](https://pypi.org/project/bip32/)

## Support

This project is NOT financed from the grin fund neither grin community fund. I deliverately did not request funding because of the following reasons:

1. I am not certain how much time I will be able to dedicate to it
2. I want this project to earn trust from the community, not have it guaranteed upfront

Anyone who wishes to support this project is welcome to donate to the following grin address

```
grin1vcjsgk6rltncqh7cxjywukjfrf825d8a6xk77msfuhf9ev3r55wq7l2ng4
```

which is my donation address, my username is [@marekyggdrasil](https://github.com/marekyggdrasil) and if you want to know more about on the [grin forum](https://forum.grin.mw/) I am known as [@renzokuken](https://forum.grin.mw/u/renzokuken/summary) me check [my website](https://mareknarozniak.com/).

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