Lazy Block Production

Manual Testing

Assumes Ignite CLI is already installed (though it's only used in the first step to help bootstrap all the necessary genesis files and accounts).

1. Initialise chain using Ignite CLI: git checkout 33b3528 && ignite chain init && git checkout main
   • For unknown reasons, the ignite chain init command does not work while in main
   • Note down the address of alice and bob so that we can use them later
2. In the ~/.test/config.toml file, set and ensure create_empty_blocks = false
3. Build the binary: go build -o testd cmd/testd/main.go
4. Start the chain in another terminal: ./testd start
   • Notice that the block height halts at 2 (use ./testd status | jq to verify)
5. Send some funds from alice to bob: ./testd tx bank send ALICE_ADDR BOB_ADDR 1token
   • Notice that the block height now halts at 4 which means an increment of 2 blocks (this seems like the "correct behaviour" according to this forum post)
   • Use ./testd query bank balances ALICE_ADDR to confirm that the balance of alice is 1token less

Once done, you may reset all chain state and repeat from step 4 for further tests: ./testd tendermint unsafe-reset-all

Code Changes

In chronological order:

1. With reference to commit 33b3528: this repository was scaffolded using Ignite CLI's ignite scaffold chain command (without the pkg directory)
2. With reference to commit 8532399: the Tendermint (v0.34.24) and Cosmos SDK (v0.46.7) codebases were cloned as is into thepkg directory
3. With reference to commit 8ecfc92: the replace directive was added to the go.mod and pkg/cosmos-sdk/go.mod files to point to the local Tendermint package located at pkg/tendermint
   • At this point, there are zero changes to the underlying source code, and the blockchain should run as per normal (ie. producing blocks every second)
4. With reference to commit 1562834: the local Tendermint and Cosmos SDk pkgs were updated to reflect the following PRs:
   1. Mark "proof blocks" on Tendermint: tendermint/tendermint#10004
   2. Ignore "proof blocks" on Cosmos SDK: cosmos/cosmos-sdk#15148