support for Injective

[Jackson-DKMG]

support for Injective

[ebellocchia]

Hi, I have to add it. If it is like the other coins built on Cosmos it shoud be pretty quick.

Regards,
Emanuele

[Jackson-DKMG]

Thanks for the quick reply!
That would be awesome.

[ebellocchia]

Hello, I added Injective as a coin.

Please note that Injective uses a different algorithm for encoding the address with respect to other Cosmos-based coins, as you can see in the code snippet from their docs. So I added a specific address encoder/decoder just for it.
With my implementation, I get the same addresses of Cosmostation wallet, which I always use as reference for Cosmos-based coins.

I don't know if the cosmpy library uses the Injective algorithm or just the standard Cosmos algorithm for encoding the address. I took a quick look and found no trace of it in the code. So, if you get different addresses with respect to cosmpy it's because of that.

[Jackson-DKMG]

Hello,

Great and thanks a lot
This works as intended, although indeed when using Cosmpy the result is still wrong:

from cosmpy.aerial.wallet import LocalWallet
from cosmpy.crypto.keypairs import PrivateKey, PublicKey

bip44_mst_ctx = Bip44.FromSeed(seed_bytes, Bip44Coins.INJECTIVE)
bip44_acc_ctx = bip44_mst_ctx.Purpose().Coin().Account(0)
bip44_chg_ctx = bip44_acc_ctx.Change(Bip44Changes.CHAIN_EXT)

bip44_addr_ctx = bip44_chg_ctx.AddressIndex(0)   #index 0 appears to be the right one here

print(bip44_addr_ctx.PublicKey().ToAddress())  # --> CORRECT ADDRESS

print(LocalWallet(PrivateKey(bip44_addr_ctx.PrivateKey().Raw().ToBytes()), prefix='inj')) #--> WRONG ADDRESS

I've ran a number of tests this morning but couldn't find a solution. I'll try some more and open an issue with the Cosmpy team if still no success.

[ebellocchia]

That's because it uses the standard Cosmos algorithm, to get the same result with bip_utils:

print(LocalWallet(PrivateKey(bip44_addr_ctx.PrivateKey().Raw().ToBytes()), prefix="inj"))
# Same address
print(AtomAddrEncoder.EncodeKey(
    bip44_addr_ctx.PublicKey().Bip32Key().KeyObject(),
    hrp="inj"
))

[Jackson-DKMG]

Indeed
I'll mention this in the issue.