hlf-database-app

Skeleton for building a Hyperledger Fabric database app

Requirements

MacOS

brew install jq

debian/ubuntu

sudo apt install jq

QUICKSTART

1. Follow hlf-service-network QUICKSTART instructions

2. Configure environment

   make config.env

   Edit config.env to taste (see below for Blockdaemon CA-server setup)

3. Build binary and make credentials:

   make

4. Create/update/join channel, then install/instantiate chaincode (only have to do this once):

   ./app init

Some things you can do

Start up a webapp

./app webapp

It should be visible here: http://localhost:3001

Set hello to a value, and retrieve it

./app set hello world
./app get hello

Store a file and retrieve it

./app store <key> <sample-file>
./app fetch <key> out
diff <sample-file> out

Clear out old chaincode

pushd $GOPATH/src/github.com/Blockdaemon/hlf-service-network
docker-compose down
popd
make clean-cc

Talk to real external hosts and not a local docker instance

Set DISABLE_MATCHERS=_ in config.env, rerun make

Talk to a Blockdaemon CA server instead of using cryptogen

cp examples/config-ca.env config.env

Edit config.env to taste, then add CA server admin creds to ca-client/local.env:

CA_USER=<adminuser>
CA_PASS=<adminpass>

Make it a bit more secure, then run make:

chmod og-rw ca-client/local.env
make

Bugs

• You may need to check out the repo in your GOPATH or chaincode installation may not work.
• If you change config.env, and you are using ca-client, you may need to rm -rf ca-client/crypto-config
• .app get/set may hang waiting for the transaction ack event. For some reason they go missing sometimes. CTRL-C to abort, the transaction usually went through

References

Based on the chainhero.io tutorial.

Requires a service network or a Blockdaemon hosted HLF network