本项目底层采用了eosio链，编写c++合约来实现数据的上链、获取、更新和删除。

运行环境

Ubuntu 20.04

安装EOSIO二进制

wget https://github.com/eosio/eos/releases/download/v2.1.0/eosio_2.1.0-1-ubuntu-20.04_amd64.deb

sudo apt install ./eosio_2.1.0-1-ubuntu-20.04_amd64.deb

安装EOSIO.CDT二进制

wget https://github.com/eosio/eosio.cdt/releases/download/v1.8.0/eosio.cdt_1.8.0-1-ubuntu-18.04_amd64.deb

sudo apt install ./eosio.cdt_1.8.0-1-ubuntu-18.04_amd64.deb

创建并解锁开发钱包

cleos wallet create -f default_wallet.pwd

cleos wallet open

cleos wallet unlock(default_wallet.pwd中的密钥)

导入eosio开发密钥

cleos wallet import --private-key 5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3

创建目录并启动创世节点

cd /root/biosboot/genesis vim genesis_start.sh #!/bin/bash DATADIR="./blockchain"

if [ ! -d $DATADIR ]; then mkdir -p $DATADIR; fi

nodeos
--signature-provider EOS_PUB_DEV_KEY=KEY:EOS_PRIV_DEV_KEY
--plugin eosio::producer_plugin
--plugin eosio::producer_api_plugin
--plugin eosio::chain_plugin
--plugin eosio::chain_api_plugin
--plugin eosio::http_plugin
--plugin eosio::history_api_plugin
--plugin eosio::history_plugin
--data-dir $DATADIR"/data"
--blocks-dir $DATADIR"/blocks"
--config-dir $DATADIR"/config"
--producer-name eosio
--http-server-address 127.0.0.1:8888
--p2p-listen-endpoint 127.0.0.1:9010
--access-control-allow-origin=*
--contracts-console
--http-validate-host=false
--verbose-http-errors
--enable-stale-production
--p2p-peer-address localhost:9011
--p2p-peer-address localhost:9012
--p2p-peer-address localhost:9013 \

$DATADIR"/nodeos.log" 2>&1 &
echo $! > $DATADIR"/eosd.pid"

运行文件

./genesis_start.sh

创建同合约的账户名metadata

cleos create key --file metadata.txt

cleos wallet import --private-key EOS_PRIV_DEV_KEY

cleos create account eosio metadata EOS_PUB_DEV_KEY

编译并部署合约metadata.cpp

mkdir metadata

cd metadata

vim metadata.cpp

eosio-cpp metadata.cpp -o metadata.wasm

cleos set contract metadata . -p metadata@active