Kava Bridge

Repository for Kava Ethereum Bridge

Directories

• (root) - Bridge module
• relayer - Relayer
• contracts - Ethereum bridge contracts

Install

make install

Installs kava-bridge and kava-relayer to $GOPATH/bin

Usage

The relayer usage can be found on the relayer README.

Development

> make help

build                          Run go build
clean                          Clean up build and temporary files
compile-contracts              Compiles contracts and creates ethermint compatible json
cover                          Run tests with coverage and save to coverage.html
golangci-lint                  Run golangci-lint
help                           Display this help message
install-devtools               Install solc and abigen used by compile-contracts
install                        Install kava-bridge
lint                           Run golint
proto-all                      Run all protobuf targets
proto-check-breaking           Check for breaking changes against master
proto-format                   Format protobuf files
proto-gen                      Generate protobuf files
proto-lint                     Lint protobuf files
proto-swagger-gen              Generate protobuf swagger
proto-update-deps              Update proto
start-geth                     Start private geth chain locally with the Bridge contract
start                          Start kava-bridge chain locally
test-integration               Run go integration tests
test                           Run go test
vet                            Run go vet
watch-integration              Run integration tests on file changes
watch                          Run tests on file changes

Test

make test

Runs all unit tests.

make watch

Runs all unit tests on file changes

Development Smart Contracts

Geth

make start-geth automatically deploys the following smart contracts. These addresses are for local testing only. They are not mainnet addresses and are subject to change. These only exist on the local Ethereum node.

• Signer Address (miner): 0x21E360e198Cde35740e88572B59f2CAdE421E6b1
• Bridge Address 0xb588617416D0B0A3C29618bf8Fb6aC0cAd4Ede7f
• Bridge Relayer: 0xa2F728F997f62F47D4262a70947F6c36885dF9fa
• WETH Address: 0x6098c27D41ec6dc280c2200A737D443b0AaA2E8F
• ERC20 Tokens (mintable by signer, see ERC20MintableBurnable.sol):
  • MEOW Address (18 decimals): 0x8223259205A3E31C54469fCbfc9F7Cf83D515ff6
  • USDC Address (6 decimals): 0x4Fb48E68842bb59f07569c623ACa5826b600F8F7
• Test User Address: 0x7Bbf300890857b8c241b219C6a489431669b3aFA
• Multicall Address: 0xB94efB606287D37732Fe871BDdD015c5E7Ab2e76
• Multicall2 Address: 0x77C3c07d77a5E99Fffdc2635CcdB66b16e3a1Bed

Kava EVM

Kava EVM also has some contracts included in the genesis state. Note that the WETH specific contract does not exist on Kava EVM. When it is bridged from Ethereum, it is a ERC20MintableBurnable.sol deployed by the bridge module.

• Multicall Address: 0xeA7100edA2f805356291B0E55DaD448599a72C6d
• Multicall2 Address: 0x62d2f38dAA1153b381c6ed2A48e7f4673303ac9A
• WKAVA Address 0x70C79B608aBBC502c2F61f38E04190fB407BefCF

These contracts were first deployed manually to Kava EVM, exported as Kava JSON state, then copied over to the init-new-chain.sh script. The following is not necessary to deploy Multicall and WKAVA, only when adding additional smart contracts to the genesis state.

# First comment out the contract additions in init-new-chain.sh to prevent
# address collisions, then start the local chain.
make start

cd contract
npx hardhat run scripts/init_kava_evm.ts --network kava

# Stop chain, then export. Copy over necessary values to init-new-chain.sh
# app_state.auth.accounts and app_state.evm.accounts
kava-bridged export | jq > export.json