Shentu Chain

Prerequisites

Install Golang 1.15+ following instructions from https://golang.org/doc/install.

Install Solidity Compiler following instructions from https://solidity.readthedocs.io/en/latest/installing-solidity.html#binary-packages.

Development

Install solc first to make CVM transactions.

Style

Mechanically copied code (that we intend to copy again in the future) from external dependencies should be kept in original style as close as possible.
All exported definitions (types, methods, functions, variables, constants, etc.) should have whole sentence comments starting with the definition name.
Group imports in the following order, separated by an empty line in between.
- Standard packages
- Other 3rd-party packages
- Tendermint packages
- Cosmos SDK packages
- Burrow packages
- Shentu packages
Before creating pull requests of your changes, run the following commandlines for style and dependencies.
```
$ make tidy
```
Also make sure to fix linter and testing errors.
```
$ make lint
$ make test
```
golangci-lint needs to be installed locally to run the linters.

Build

To include the built binary to GOBIN,

$ make install

To build for Windows, Linux, and macOS,

$ make release

Unit Test

Run unit test:

$ make test

Run unit test and view brief coverage in cli:

$ make test-cov

Run unit test and view detailed coverage report in browser:

$ make test-cov-html

Build Docker Image

$ make image

This builds the docker image for the shentu node daemon & client. (Note that this command needs to be run prior to the multi node testnet setup below.)

Multi Node Testnet

Run make image first to build the images initially (no need to be rerun for usual code update).

Setup a localnet (per code change):

$ make localnet-start

This will run (four) testnet nodes in the background as well as an interactive client. If you want to see node output, do docker-compose logs -f (in other terminal) which will display output from all four nodes until you exit the process. Stops the localnet by docker-compose down.

To access the running localnet machine, you can list the running containers through

docker container ls --all

and access the specific container through

docker exec -it <container name> /bin/bash

Run the scripts for testing:

$ shentud query account $NODE0_KEY
$ shentud query bank total

# Create a new account
$ shentud keys add jack
$ JACK_KEY=$(shentud keys show jack -a)
# default password = jkljkljkl
$ shentud tx send node0 $JACK_KEY 100000uctk --gas-prices=0.025uctk --from node0
$ shentud query account $JACK_KEY

Finally, run make localnet-stop to shutdown the localnet.

Deploy Testnet on AWS

Please see e2e/README.md for instructions.

Single Node Chain (without Docker)

Recommend the use of the provided Docker containers for simplicity, but here are instructions for manually setting up a single node chain for testing purposes.

$ shentud unsafe-reset-all
$ rm -rf ~/.shentud

$ shentud init node0 --chain-id shentuchain

$ shentud keys add jack

$ shentud add-genesis-account $(shentud keys show jack -a) 10000000000000000uctk

$ shentud add-genesis-certifier $(shentud keys show jack -a)

$ shentud add-genesis-shield-admin $(shentud keys show jack -a)

Notification: Every transaction will need 5000uctk , so you'd better start with more than 5000uctk here.

$ shentud gentx jack 10000000000000000uctk --chain-id shentuchain
$ shentud collect-gentxs

$ shentud start

$ shentud query account $(shentud keys show jack -a)

$ shentud keys add alice
$ shentud tx send jack $(shentud keys show alice -a) 7000000000uctk --gas-prices=0.025uctk --from jack --chain-id shentuchain
$ shentud query account $(shentud keys show jack -a)
$ shentud query account $(shentud keys show alice -a)

CVM module test commands

simple.sol

We have a very simple storage setter / getter contract tests/sync/simple.sol.

pragma solidity >=0.4.0 <0.7.0;

contract SimpleStorage {
    uint storedData;

    function set(uint x) public {
        storedData = x;
    }

    function get() public view returns (uint) {
        return storedData;
    }
}

To deploy tests/sync/simple.sol contract (be sure to have solc installed), first compile it into a bytecode (.bin file) and abi.

Assuming you have simple.sol compiled into simple.bytecode (.bin file) and simple.abi

$ cd tests
$ shentud tx cvm deploy simple.bin --abi simple.abi --from node0

Printed on the main terminal

Response:
  TxHash: 8067DBC001BE239E5A44843CCEF4C71A87B802352989F97664AF8F265E7B888E

Printed on the shentud node server terminals

I[2019-06-27|09:05:33.281] CVM Start                                    module=main txHash=8067dbc001be239e5a44843ccef4c71a87b802352989f97664af8f265e7b888e
I[2019-06-27|09:05:33.282] CVM                                          module=main log_channel=Trace scope=NewVM message="(1) (89203146CD64A945BE5B02B0C44FB0040855C02A) 07BC7F3C21C34643A90AA1138C950FAC5025B693 (code=229) gas: 1000000 (d) 608060405234801561001057600080FD5B5060C68061001F6000396000F3FE6080604052348015600F57600080FD5B506004361060325760003560E01C806360FE47B11460375780636D4CE63C146062575B600080FD5B606060048036036020811015604B57600080FD5B8101908080359060200190929190505050607E565B005B60686088565B6040518082815260200191505060405180910390F35B8060008190555050565B6000805490509056FEA265627A7A723058205FEC64D09C278453AB74A855DCC214EA05BF9541E35E851AF41570397593055564736F6C63430005090032\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.283] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 0   (op) PUSH1          (st) 0    (gas) 1000000" tag=DebugOpcodes
I[2019-06-27|09:05:33.283] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000080\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.283] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 2   (op) PUSH1          (st) 1    (gas) 999999" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000040\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 4   (op) MSTORE         (st) 2    (gas) 999998" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000080 @ 0x40\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 5   (op) CALLVALUE      (st) 0    (gas) 999996" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 6   (op) DUP1           (st) 1    (gas) 999995" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message=" => [1] 0x0000000000000000000000000000000000000000000000000000000000000000\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.284] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 7   (op) ISZERO         (st) 2    (gas) 999993" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message=" 0000000000000000000000000000000000000000000000000000000000000000 == 0 = 1\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 8   (op) PUSH2          (st) 2    (gas) 999991" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000010\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 11  (op) JUMPI          (st) 3    (gas) 999990" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message=" ~> 16\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 16  (op) JUMPDEST       (st) 1    (gas) 999988" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 17  (op) POP            (st) 1    (gas) 999988" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000000\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 18  (op) PUSH1          (st) 0    (gas) 999987" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x00000000000000000000000000000000000000000000000000000000000000C6\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.285] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 20  (op) DUP1           (st) 1    (gas) 999986" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message=" => [1] 0x00000000000000000000000000000000000000000000000000000000000000C6\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 21  (op) PUSH2          (st) 2    (gas) 999984" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x000000000000000000000000000000000000000000000000000000000000001F\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 24  (op) PUSH1          (st) 3    (gas) 999983" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000000\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 26  (op) CODECOPY       (st) 4    (gas) 999982" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message=" => [0, 31, 198] 6080604052348015600F57600080FD5B506004361060325760003560E01C806360FE47B11460375780636D4CE63C146062575B600080FD5B606060048036036020811015604B57600080FD5B8101908080359060200190929190505050607E565B005B60686088565B6040518082815260200191505060405180910390F35B8060008190555050565B6000805490509056FEA265627A7A723058205FEC64D09C278453AB74A855DCC214EA05BF9541E35E851AF41570397593055564736F6C63430005090032\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 27  (op) PUSH1          (st) 1    (gas) 999979" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message=" => 0x0000000000000000000000000000000000000000000000000000000000000000\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message="(pc) 29  (op) RETURN         (st) 2    (gas) 999978" tag=DebugOpcodes
I[2019-06-27|09:05:33.286] CVM                                          module=main log_channel=Trace scope=NewVM message=" => [0, 198] (198) 0x6080604052348015600F57600080FD5B506004361060325760003560E01C806360FE47B11460375780636D4CE63C146062575B600080FD5B606060048036036020811015604B57600080FD5B8101908080359060200190929190505050607E565B005B60686088565B6040518082815260200191505060405180910390F35B8060008190555050565B6000805490509056FEA265627A7A723058205FEC64D09C278453AB74A855DCC214EA05BF9541E35E851AF41570397593055564736F6C63430005090032\n" tag=DebugOpcodes
I[2019-06-27|09:05:33.287] CVM Stop                                     module=main result=07bc7f3c21c34643a90aa1138c950fac5025b693

To inspect deploy transaction details and to obtain Bech32 contract address

$ shentud query tx 8067DBC001BE239E5A44843CCEF4C71A87B802352989F97664AF8F265E7B888E
Response:
  Height: 169
  TxHash: 8067DBC001BE239E5A44843CCEF4C71A87B802352989F97664AF8F265E7B888E
  Data: 07BC7F3C21C34643A90AA1138C950FAC5025B693
  Raw Log: [{"msg_index":"0","success":true,"log":"shentu1q77870ppcdry82g25yfce9g043gztd5n99x7we"}]
  Logs: [{"msg_index":0,"success":true,"log":"shentu1q77870ppcdry82g25yfce9g043gztd5n99x7we"}]
  GasWanted: 200000
  GasUsed: 41849
  Tags:
    - action = deploy

  Timestamp: 2019-06-27T16:05:27Z

To inspect contract code bytes deployed at shentu1q77870ppcdry82g25yfce9g043gztd5n99x7we

$ shentud query cvm code shentu1q77870ppcdry82g25yfce9g043gztd5n99x7we
6080604052348015600F57600080FD5B506004361060325760003560E01C806360FE47B114603757
80636D4CE63C146062575B600080FD5B606060048036036020811015604B57600080FD5B81019080
80359060200190929190505050607E565B005B60686088565B604051808281526020019150506040
5180910390F35B8060008190555050565B6000805490509056FEA265627A7A723058205FEC64D09C
278453AB74A855DCC214EA05BF9541E35E851AF41570397593055564736F6C63430005090032

To call SimpleStorage.set(123) at the contract

$ shentud tx cvm call shentu1q77870ppcdry82g25yfce9g043gztd5n99x7we set 123 --from node0

Then we can verify the storage setting by calling SimpleStorage.get() at the contract

$ shentud tx cvm call shentu1q77870ppcdry82g25yfce9g043gztd5n99x7we get --from node0
Response:
  TxHash: 6EAABFDF5022F21F88D9DBBE8A0837F3CF6819F06F801BEF301188F22DF16C9B

We can inspect and verify the read out value is indeed 123 (0x7b) by either looking at the shentud node server terminal

I[2019-06-27|09:20:44.674] CVM Stop                                     module=main result=000000000000000000000000000000000000000000000000000000000000007b

or query the get call transaction

$ shentud query tx 6EAABFDF5022F21F88D9DBBE8A0837F3CF6819F06F801BEF301188F22DF16C9B
Response:
  Height: 333
  TxHash: 6EAABFDF5022F21F88D9DBBE8A0837F3CF6819F06F801BEF301188F22DF16C9B
  Data: 000000000000000000000000000000000000000000000000000000000000007B
  Raw Log: [{"msg_index":"0","success":true,"log":""}]
  Logs: [{"msg_index":0,"success":true,"log":""}]
  GasWanted: 200000
  GasUsed: 17677
  Tags:
    - action = call

  Timestamp: 2019-06-27T16:20:38Z

DeepSEA Integration

Analogous to the steps above, a DeepSEA contract contract.ds can be deployed with:

$ shentud tx cvm deploy contract.ds --from node0

Make sure that dsc (DeepSEA compiler) is in your PATH.

REST test commands

Start the rest-server in another terminal window:

$ shentud rest-server --trust-node

Back to the previous terminal window where NODE0_KEY is defined:

# Initiate Transaction: Burn 2 ctk from node0.
$ curl -XPOST -s http://localhost:1317/ctk/burn --data-binary '{"base_req":{"from":"'$NODE0_KEY'","chain_id":"shentuchain"},"src":"'$NODE0_KEY'","amount":"2"}' > unsignedTx.json

# Sign Transaction
# Note: sequence and account-number can be found in account information
$ shentud tx sign unsignedTx.json --from $NODE0_KEY --offline --chain-id shentuchain --sequence 5 --account-number 0 > signedTx.json

# Broadcast Transaction
$ shentud tx broadcast signedTx.json

# Check the balance of node0
$ curl -s http:/localhost:1317/ctk/balance/$NODE0_KEY

shentufoundation / shentu

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