mock-consensus: 🚀 test node can send an empty block

[cratelyn]

fixes #3792.

see #3588.

• block module defining interfaces to build a tendermint block,
  holding a unique reference to the TestNode.
• abci module defining TestNode interfaces that will send consensus
  requests to the application. this includes:
  • BeginBlock
  • DeliverTx
  • EndBlock
  • Commit
• send_block module defining a TestNode interface to send the
  requisite abci requests, given a tendermint::Block.
• documentation is added for assorted public interfaces.

this represents a huge, exciting step for work on the mock engine! we
can now initialize and send an (empty) block to the consensus service.

✨ 🎊 ✨ 🎊 ✨

what next?

this isn't a comprehensive set of interfaces.
penumbra_mock_consensus::block::Builder will certainly grow more
methods as it is iterated upon. we'll use work in porting tests
(see #3788) to drive which other fields are needed.

forthcoming work will build upon this to:

• introduce more builder methods to set other Header fields (e.g.
  timestamp, see tests: ⏰ expose time facilities in mock consensus engine #3759)
• use the reference to the test node to set other Header fields (e.g.
  height)

todo comments are left to that effect.

---

• Tracking issue: 🤝 mock consensus engine for App tests #3588
• tests: 🧩 provide a block builder api in the mock consensus engine #3792

[cratelyn]

  2024-02-14T16:27:15.112293Z TRACE penumbra_mock_consensus: consensus service is now ready
    at crates/test/mock-consensus/src/lib.rs:58

  2024-02-14T16:27:15.112310Z  INFO penumbra_app::server::consensus: beginning block, time: Time(2024-02-14 16:27:15.112272209)
    at crates/core/app/src/server/consensus.rs:189

there is still more progress to be made, but i am making exciting headway.

[cratelyn]

; RUST_LOG="warn,penumbra_mock_consensus=info,penumbra_app=info" cargo test --package penumbra-app mock_consensus_can_send_a_single_empty_block -- --nocapture
    Finished test [unoptimized + debuginfo] target(s) in 0.14s
     Running unittests src/lib.rs (target/debug/deps/penumbra_app-41ef6ed30f292e6b)

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 3 filtered out; finished in 0.00s

     Running tests/mock_consensus.rs (target/debug/deps/mock_consensus-768e4e857471398c)

running 1 test
  2024-02-15T02:03:05.238498Z  INFO penumbra_app::server::consensus: genesis state is a full configuration
    at crates/core/app/src/server/consensus.rs:143

  2024-02-15T02:03:05.240890Z  INFO penumbra_app::server::consensus: finished init_chain, consensus_params: Params { block: Size { max_bytes: 1, max_gas: 1, time_iota_ms: 1 }, evidence: Params { max_age_num_blocks: 1, max_age_duration: Duration(1s), max_bytes: 1 }, validator: ValidatorParams { pub_key_types: [] }, version: Some(VersionParams { app: 1 }), abci: AbciParams { vote_extensions_enable_height: None } }, validators: [], app_hash: RootHash("5fc87d8a020365f0bc2cff7b1e8fc5dc3d14f862a7c860dc231e6d44fa847277")
    at crates/core/app/src/server/consensus.rs:153

  2024-02-15T02:03:05.241042Z  INFO penumbra_mock_consensus::send_block: sending block
    at crates/test/mock-consensus/src/send_block.rs:43
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.241097Z  INFO penumbra_app::server::consensus: beginning block, time: Time(2024-02-15 2:03:05.240968549)
    at crates/core/app/src/server/consensus.rs:189
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.241538Z  INFO penumbra_app::server::consensus: ending block, height: 1
    at crates/core/app/src/server/consensus.rs:220
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.249423Z  INFO penumbra_app::server::consensus: k: "anchor", v: "{\"inner\":\"M+y7x5shDKelpCpbBLmov/hSsA14YXPpamwiR3X/yAU=\"}"
    at crates/core/app/src/server/consensus.rs:26
    in penumbra_app::server::consensus::event with kind: "penumbra.core.component.sct.v1.EventAnchor"
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.249439Z  INFO penumbra_app::server::consensus: k: "height", v: "\"1\""
    at crates/core/app/src/server/consensus.rs:26
    in penumbra_app::server::consensus::event with kind: "penumbra.core.component.sct.v1.EventAnchor"
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.249462Z  INFO penumbra_app::server::consensus: k: "height", v: "\"1\""
    at crates/core/app/src/server/consensus.rs:26
    in penumbra_app::server::consensus::event with kind: "penumbra.core.component.sct.v1.EventBlockRoot"
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.249470Z  INFO penumbra_app::server::consensus: k: "root", v: "{\"inner\":\"AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=\"}"
    at crates/core/app/src/server/consensus.rs:26
    in penumbra_app::server::consensus::event with kind: "penumbra.core.component.sct.v1.EventBlockRoot"
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.250853Z  INFO penumbra_app::server::consensus: committed block, app_hash: RootHash("ae6ccf9eae1acd05631a06cd7247cff7ee8eb0900fa88bfc60f7fe157ee6dd95")
    at crates/core/app/src/server/consensus.rs:244
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

  2024-02-15T02:03:05.250904Z  INFO penumbra_mock_consensus::send_block: finished sending block
    at crates/test/mock-consensus/src/send_block.rs:51
    in penumbra_mock_consensus::send_block::send_block with height: 1, time: 2024-02-15T02:03:05.240968549Z, app_hash: 

test mock_consensus_can_send_a_single_empty_block ... ok

[hdevalence]

Amazing!