fea: eth secp256k1

[beer-1]

You can append eth account with the following account.

initiad keys import-hex eth-acc  \
    0xafdfd9c3d2095ef696594f6cedcae59e72dcd697e2a7521b1578140422a4f890 \
    --key-type eth_secp256k1

EIP191

we got solution from scrtlabs
initia-labs/cosmos-sdk@392af57

initiad tx bank send [from] [to] [amount] --sign-mode eip-191

[codecov]

Codecov Report

Merging #24 (563160b) into main (c6252bb) will increase coverage by 0.28%.
The diff coverage is 79.25%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   44.53%   44.81%   +0.28%     
==========================================
  Files         164      167       +3     
  Lines       16076    16210     +134     
==========================================
+ Hits         7159     7265     +106     
- Misses       8142     8160      +18     
- Partials      775      785      +10     

Files	Coverage Δ
app/app.go	88.68% <ø> (-0.02%)	⬇️
app/encoding.go	100.00% <100.00%> (ø)
crypto/keys/eth/secp256k1/hash.go	60.00% <60.00%> (ø)
crypto/keys/eth/secp256k1/secp256k1_nocgo.go	64.70% <64.70%> (ø)
crypto/keys/eth/secp256k1/secp256k1.go	84.94% <84.94%> (ø)