Inery Task 3

 

Inery create CRUD contract

Official docs

Inery write contract : https://docs.inery.io/docs/category/contract-write
Inery CRUD contract : https://docs.inery.io/docs/category/create-crud-contract

Install build-dep

sudo apt update -y && sudo apt upgrade -y

sudo apt install -y make bzip2 automake libbz2-dev libssl-dev doxygen graphviz libgmp3-dev \

autotools-dev libicu-dev python2.7 python2.7-dev python3 python3-dev \

autoconf libtool curl zlib1g-dev sudo ruby libusb-1.0-0-dev \

libcurl4-gnutls-dev pkg-config patch llvm-7-dev clang-7 vim-common jq libncurses5

Set inery accname env vars

IneryAccname=<FILL_YOUR_ACOOUNT_NAME> # view on testnet dashboard

##Get binary inery.cdt tools

Clone from official github

cd ~
git clone --recursive https://github.com/inery-blockchain/inery.cdt

Set as env vars

temporary vars:

export PATH="$PATH:$HOME/inery.cdt/bin:$HOME/inery-node/inery/bin"

or permanent vars;

echo 'export PATH="$PATH:$HOME/inery.cdt/bin:$HOME/inery-node/inery/bin"' >> $HOME/.bash_profile
source $HOME/.bash_profile

Write and compile contract

Make directrory

mkdir -p inrcrud

Write code

tee inrcrud/inrcrud.cpp >/dev/null <<EOF

#include <inery/inery.hpp>

#include <inery/print.hpp>

#include <string>

using namespace inery;

using std::string;

class [[inery::contract]] inrcrud : public inery::contract {

  public:

    using inery::contract::contract;

        [[inery::action]] void create( uint64_t id, name user, string data ) {

            records recordstable( _self, id );

            auto existing = recordstable.find( id );

            check( existing == recordstable.end(), "record with that ID already exists" );

            check( data.size() <= 256, "data has more than 256 bytes" );

            recordstable.emplace( _self, [&]( auto& s ) {

               s.id         = id;

               s.owner      = user;

               s.data       = data;

            });

            print( "Hello, ", name{user} );

            print( "Created with data: ", data );

        }

         [[inery::action]] void read( uint64_t id ) {

            records recordstable( _self, id );

            auto existing = recordstable.find( id );

            check( existing != recordstable.end(), "record with that ID does not exist" );

            const auto& st = *existing;

            print("Data: ", st.data);

        }

        [[inery::action]] void update( uint64_t id, string data ) {

            records recordstable( _self, id );

            auto st = recordstable.find( id );

            check( st != recordstable.end(), "record with that ID does not exist" );

            recordstable.modify( st, get_self(), [&]( auto& s ) {

               s.data = data;

            });

            print("Data: ", data);

        }

            [[inery::action]] void destroy( uint64_t id ) {

            records recordstable( _self, id );

            auto existing = recordstable.find( id );

            check( existing != recordstable.end(), "record with that ID does not exist" );

            const auto& st = *existing;

            recordstable.erase( st );

            print("Record Destroyed: ", id);

        }

  private:

    struct [[inery::table]] record {

       uint64_t        id;

       name     owner;

       string          data;

       uint64_t primary_key()const { return id; }

    };

    typedef inery::multi_index<"records"_n, record> records;

 };

EOF

Compile code

inery-cpp inrcrud/inrcrud.cpp -o inrcrud/inrcrud.wasm

Deploy contract

First unlock wallet

cline wallet unlock --password 

Set contract

cline set contract $IneryAccname ./inrcrud

Make push contract transaction

• create action

cline push action $IneryAccname create "[1, $IneryAccname, My first Record]" -p $IneryAccname -j

• read action

cline push action $IneryAccname read [1] -p $IneryAccname -j

• update action

cline push action $IneryAccname update '[ 1,  "My first Record Modified"]' -p $IneryAccname -j

• destroy action

cline push action $IneryAccname destroy [1] -p $IneryAccname -j

DONE