Test Guide

1. Prepare: launch local testnet

1.1 Build relaychain: polkadot

git clone https://github.com/OmniBTC/polkadot.git

cd polkadot 
git checkout release-v0.9.32-fix

cargo build --release

1.2 Build parachain: psc

git clone https://github.com/OmniBTC/PSC.git

cargo build --release

1.3 Install zombienet

zombienet aims to be a testing framework for Substrate based blockchains,

providing a simple cli tool that allows users to spawn and test ephemeral networks.

1.4 Launch testnet with native(recommend)

Make sure that zombienet, polkadot and psc in your PATH.

cd PSC

zombienet spawn --provider native ./zombienet/psc-small-network.toml

1.5 Launch testnet with podman

We provide polkadot and psc docker images to support podman.

docker pull comingweb3/polkadot:v0.9.32 
docker pull comingweb3/psc:latest

cd PSC

zombienet spawn --provider podman ./zombienet/psc-small-network.toml

2. Basic 1: substrate account get DOT

2.1 Connect to polkadot wallet

Direct use polkadot.js.org for develop accounts

2.2 Explore relaychain

Direct link: https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:9944#/explorer

2.3 Explore parachain

Direct link: https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:9977#/explorer

2.4 Transfer DOT from relaychain to parachain by DMP

transfer 10000000000000000 (means 1000000 DOT, decimals=10) to Alice(5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY)

2.5 Transfer DOT from parachain to relaychain by UMP

transfer 1000000000000000 (means 100000 DOT, decimals=10) to Alice(15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5)

3. Basic 2: evm account get DOT(On PSC)

3.1 Connet to metamask

Network name: Polkadot Smart Chain
RPC URL: http://127.0.0.1:8546
Chain ID: 1508
Currency symbol: DOT

3.2 Bind evm and substrate address with 0.1 DOT

Eth Signed Data Format

"evm:" + substrate_pubkey_hex_without_0x

3.2.1 Get the public key hex string

Alice account address: 15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5

Use this online tool can get its public key: 0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d

To sign data is evm:d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d

3.2.2 Get signature by Remix sign tool

Open remix connect to metamask(select you evm account, here is 0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a)

Use remix sign tool, to sign evm:d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d

Get the signature: 0x861509e2adea37d7a85448fef8d857f6018bb95fe574aec21ac7977da4d0b1481fd789cc7821748b31691c7e151c45782b0535cdfd483739276ab05535f542311c

3.2.3 Call assetsBridge->claimAccount

The evm address 0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a has been bound to the Alice substrate address 15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5.

3.3 Deposit some DOTs to evm account

Call assetsBridge->teleport

deposit 1000000000000 (means 100 DOT, decimals=10)

The transferable DOT is 99.99, because EXISTENTIAL_DEPOSIT = 0.01 DOT on PSC.

For more details, By this tool, we can get the evm address's proxy substrate account.

node src/evm_to_dot.js 0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a
evm address:  0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a
dot account:  15gBPp5zAgaxtgzMi843onWu1gUuXbKMAy5Xu3XTNKcUqreH

The balance is indeed 100 DOT.

3.4 Transfer DOTs to other evm account by metamask

Transfer 10 DOT from 0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a to 0xcaf084133cbdbe27490d3afb0da220a40c32e307

3.5 Withdraw some DOTs from evm account

The evm address 0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a has been bound to the Alice substrate address 15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5.

Alice Call assetsBridge->teleport to withdraw 100000000000 (means 10 DOT, decimals=10) from 0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a,

And it will deposit 100000000000 (means 10 DOT, decimals=10) into Alice(15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5).

4. Advance: mapping wasm assets into evm tokens

4.1 Mint some wasm assets

Mint 1000000000000000000000 (means 1000 Reserved0, decimals = 18) to Alice

4.2 Deploy ERC20 contract

4.2.1 Connect Remix

Run remixd to access local contracts

cd PSC
bash scripts/remix.sh

4.2.2 Compile AssetsBridgeErc20_OnlyAdmin.sol

Choose AssetsBridgeErc20_OnlyAdmin.sol to compile

4.2.3 Deploy contract

Deploy AssetsBridgeErc20 contract

name = Reserved0
symbol = RSV0
decimals = 18

Get the contract address 0xf3607524cAB05762cB5F0cAb17e4cA3A0F0b4E87

4.3 Bind wasm Reserved0 and erc20 Reserved0

For this guide, the admin of assets-bridge is Alice.

In the production environment, the admin of assets-bridge must audits whether the erc20 contract implements IAssetsBridge interface and whether it has the AssetsBridgeAdmin modifier.

Call assetsBridge->register

4.4 Deposit Reserved0 (wasm -> evm)

Deposit 1000000000000000000000 (means 1000 Reserved0, decimals = 18) Reserved0 from wasm to evm

Before the balance is 0, now is 1000000000000000000000 (means 1000 Reserved0, decimals = 18)

4.5 Withdraw Reserved0 (evm -> wasm)

Withdraw 1000000000000000000000 (means 1000 Reserved0, decimals = 18) from evm to wasm

Before the balance is 1000000000000000000000 (means 1000 Reserved0, decimals = 18), now is 0