IOV Weave is a framework for quickly building your custom ABCI application to run a blockchain on top of the best-of-class BFT Proof-of-stake Tendermint consensus engine. It provides much commonly used functionality that can quickly be imported in your custom chain, as well as a simple framework for adding the custom functionality unique to your project.
Note: Requires Go 1.9+
It is inspired by the routing and middleware model of many web application frameworks, and informed by years of wrestling with blockchain state machines. More directly, it is based on the official cosmos-sdk, both the 0.8 release as well as the future 0.9 rewrite. Naturally, as I was the main author of 0.8.
While both of those are extremely powerful and flexible and contain advanced features, they have a steep learning curve for novice users. Thus, this library aims to favor simplicity over power when there is a choice. If you hit limitations in the design of this library (such as maintaining multiple merkle stores in one app), I highly advise you to use the official cosmos sdk.
On the other hand, if you want to try out tendermint, or have a design that doesn't require an advanced setup, you should try this library and give feedback, especially on ease-of-use. The end goal is to make blockchain development almost as productive as web development (in golang), by providing defaults and best practices for many choices, while allowing extreme flexibility in business logic and data modelling.
For more details on the design goals, see the Design Document
First, make sure you have set up the requirements. If you have a solid go and node developer setup, you may skip this, but good to go through it to be sure.
Once you are set up, you should be able to run something
like the following to compile both
mycoind (sample app)
tendermint (a BFT consensus engine):
go get github.com/iov-one/weave cd $GOPATH/src/github.com/iov-one/weave make deps make install # test it built properly tendermint version # 0.21.0-46369a1a mycoind version # v0.6.0-7-g3aa16c9
Once it compiles, I highly suggest going through the tutorials on readthedocs
The original version, until
v0.6.0 was released under
confio/weave. The original author, Ethan Frey, had
previously worked on the
and wanted to make a simpler framework he could use to
start building demo apps, while the main sdk matured.
confio/weave was born the first few months of 2018.
This framework was designed to be open source and shared,
but the only real usage and development was by
IOV, so it was donated to
that organization in August 2018 to be developed further
for their BNS blockchain, as well as a companion to
client libraries that deprecated