#blockchain #chain #cosmos #tendermint #transaction

chainlib

A library to help with creating HD wallets and signing Crypto.org Chain transfer transactions offline

2 releases

0.1.1 Mar 10, 2021
0.1.0 Jan 21, 2021

#601 in Magic Beans

Apache-2.0

80KB
2K SLoC

chainlib is a library to help with creating HD wallets and signing Crypto.org Chain transfer transactions offline.

prepare

Before a test, we need to send some coin amount to a HD wallet recovered from the mnemonic words.

  1. transfer some coin to a mnemonic words-recovered account; to get the HD address, you can use the following code:
let words = "dune car envelope chuckle elbow slight proud fury remove candy uphold puzzle call select sibling sport gadget please want vault glance verb damage gown";
let mnemonic = Mnemonic::from_str(words, password)?;
let key_service = PrivateKeyService::new_from_mnemonic(mnemonic)?;
let address = key_service.address()?;
let address_str = address.to_bech32("cro");
println!("{}", address_str);

or you can recover mnemonic to a local storage: chain-maind keys add hd-wallet --keyring-backend test --recover and use chain-maind keys list --keyring-backend test to see the address.

  1. Transfer some coin amount to the recovered HD address using chain-maind:
chain-maind tx bank send \
    ${from_address} \
    ${hd_address} \
    100cro \
    --keyring-backend test \
    --chain-id test \
    --sign-mode amino-json
  1. There are some coins in the HD wallet now, you can test to sign offline and send the signed transaction to Chain API URL. To see the full detail, go to the examples directory.

build examples

cargo build --example amino

or

cargo build --example protobuf --features=grpc

unit test

cargo test --lib --all-features

Dependencies

~26MB
~568K SLoC