Technical Update 15

By Michael Kong

Go-lachesis

• Implemented part of eth backend api for clef testing purposes: PR#323
• Applied fix to genesis: PR#324
• Improvement to “seeing” strategy: PR#325
• Network demo setup: PR#326
• Refactoring and bugfixes: PR#327, PR#329
• Updated document Gas power improvement calculations
• Improvement to Gas power calculations: PR#328
• Integration Testing: PR#330
• Additional rules for onFrameDecided (protection against huge blocks). Forbid linking to a node if self-parent has observed a fork from it: PR#331
• Prevent the inclusion of the same transaction from different validators: PR#332
• Added DB fault tolerance: PR#333
• Gossip optimisation: PR#334
• Fixed emitter deadlock: PR#335
• Created API calls for Event debugging: PR#336
• Gossip tmpDB fix: PR#337
• Created API calls for sending transactions: PR#338
• Created Toml configuration: PR#339
• Updated README.md on how to build and run Lachesis: PR#340
• Created API calls for getting txs and blocks by hash: PR#341
• Added Docker swam simulation scripts: PR#342
• Created protection against Self-forks: PR#343
• Added DB fault tolerance for Gossip: PR#344
• Refactored emitter and gossip implementations, added comments: PR#345
• Started work on contract logs searching

Rust

• Upgraded dependencies
• [Cargo.toml] Upgraded dependencies; removed lachesis; [fvm] Remove parity keccak replace with tiny-keccak
• Implemented Instruction interface for OpCodes
• Removed idea info
• Created skeleton of the consensus implementation
• [.idea] Removed; [.gitignore] Ignored .idea
• changed how we serialize
• Migrated to new big types library
• Added consensus to VM
• Fixed build for evm-rs
• [Cargo.toml,src/{instructions,lib}.rs] Upgraded dependencies; auto format
• [Cargo.toml] Fixd “no method named `is_xid_start` found for type `char` in the current scope” from runtime-fmt; [README.md] Renamed package
• [*.rs] rustfmt; [Cargo.toml] Upgraded dependencies
• [lib.rs] Resolved error `&` without an explicit lifetime name cannot be used here; [.gitignore] Updated
• Removed dependency on transport
• Set pending values
• [.gitignore] Ignored “.idea”; [Cargo.toml] Upgraded dependencies
• Transitioned to using failure crate
• Method renaming: new()->new_from_digest(), hash()->new()
• Reflected latest changes in libhash
• Reflected changes in libhash: https://github.com/Fantom-foundation/libhash-sha3/commit/6b3469d
• [.gitignore] Removed duplicate; [Cargo.toml] Upgraded dependencies: https://github.com/Fantom-foundation/libconsensus/commit/ea226dc
• Removed necessity of libcommon::Error: https://github.com/Fantom-foundation/libconsensus/commit/22dd52a
• Merge pull request #6 from Fantom-foundation/to_failure Use failure: https://github.com/Fantom-foundation/libconsensus/commit/7b9985c
• Fixed source code formatting: https://github.com/Fantom-foundation/libconsensus/commit/a6757c7
• Added Hash trait to BaseConsensusPeer and TransactionType: https://github.com/Fantom-foundation/libconsensus/commit/79311c5
• Add Public key into BaseConsensusPeer: https://github.com/Fantom-foundation/libconsensus/commit/a174b50
• Corrections to comply with the latest version of libcommon-rs: https://github.com/Fantom-foundation/libconsensus/commit/7cc8d5d
• Merged pull request #5 from Fantom-foundation/docs Docs: https://github.com/Fantom-foundation/libconsensus/commit/0796862
• Updated Rust version for matrix: https://github.com/Fantom-foundation/libconsensus/commit/78c6830
• Edited errors and README files: https://github.com/Fantom-foundation/libconsensus/commit/9de13c8
• Edited lib.rs to have more comments and rigid explanations: https://github.com/Fantom-foundation/libconsensus/commit/0abe389
• [.gitignore] Removed duplicate; [Cargo.toml] Upgraded dependencies: https://github.com/Fantom-foundation/libtransport/commit/8fb4dfd
• Transition to using failure crate: https://github.com/Fantom-foundation/libtransport/commit/fb78ddb
• Add Default implementation for generic_test::Id: https://github.com/Fantom-foundation/libtransport/commit/8060ee2
• Add broadcast_n() method to Transport and TransportSender: https://github.com/Fantom-foundation/libtransport/commit/d48d987
• Corrected to compy with new version of libcommon-rs: https://github.com/Fantom-foundation/libtransport/commit/51e2f30
• Fixed to reflect latest version of libcommon_rs: https://github.com/Fantom-foundation/libtransport/commit/38d6448
• Merged pull request #5 from Fantom-foundation/nonerror Added Nonerror: https://github.com/Fantom-foundation/libtransport/commit/0f2a24d
• Added Nonerror: https://github.com/Fantom-foundation/libtransport/commit/a2c4908
• Implemented Display trait for Id in generic test: https://github.com/Fantom-foundation/libtransport/commit/94541c0
• Added split onto TransportSender and TransportReceiver traits: https://github.com/Fantom-foundation/libtransport/commit/805f688
• Added derived Clone trait to TransportType: https://github.com/Fantom-foundation/libtransport/commit/af2edad
• Aligned number of parameter types with libtransport crate: https://github.com/Fantom-foundation/libtransport-tcp/commit/a3f89e6
• Correction to comply with the latest version of libtransport: https://github.com/Fantom-foundation/libtransport-tcp/commit/519249d
• Added TransportReceiver and TransportSender traits; comply with new version of libtransport: https://github.com/Fantom-foundation/libtransport-tcp/commit/e7f63b5
• Merged pull request #4 from Fantom-foundation/docs Docs: https://github.com/Fantom-foundation/libtransport-tcp/commit/0899768
• Initialisation script for libsignature: https://github.com/Fantom-foundation/libsignature/commit/e9a661c
• [Cargo.toml] Upgraded dependencies; [.gitignore/.git] remove .idea; [main.rs] Subcommand refactor preparation: https://github.com/Fantom-foundation/full-cli-rs/commit/0599ff4
• Implemented Debug for Signature trait: https://github.com/Fantom-foundation/libsignature-ed25519-dalek/commit/4b7b668
• Implemened Hash trait for Signature: https://github.com/Fantom-foundation/libsignature-ed25519-dalek/commit/8b9baf4
• Added libsignature::SecretKey and libsignature::PublicKey traits: https://github.com/Fantom-foundation/libsignature-ed25519-dalek/commit/a6f4579
• Initialisation script and description of libsignature: https://github.com/Fantom-foundation/libsignature-ed25519-dalek/commit/ad3b85fies
• Transitioned to using failure crate: https://github.com/Fantom-foundation/libhash/commit/e5edd21
• Renamed Hashing to Hash; add PartialEq trait as requirement for an implementation: https://github.com/Fantom-foundation/libhash/commit/397ff3c
• Added basic documentation to the libhash crate: https://github.com/Fantom-foundation/libhash/commit/828a977
• Resolved compilation errors: https://github.com/Fantom-foundation/libconsensus-dag/commit/1ec303
• Switched to using libcommon_rs::Stub for HRTB: https://github.com/Fantom-foundation/libconsensus-dag/commit/ded3715
• Transitioned from Std::Error to failure: https://github.com/Fantom-foundation/libcommon-rs/commit/6a01fc4
• Added DataType trait: https://github.com/Fantom-foundation/libcommon-rs/commit/a6aebc0
• Added base_addr; chage net_addr into vector: https://github.com/Fantom-foundation/libcommon-rs/commit/5ef6359
• Added NoneError to Libcommon: https://github.com/Fantom-foundation/libcommon-rs/commit/db1ddde

Research

• Working on modifications to FIP-2: Proof of Stake proposal for Go-Lachesis implementation
• Implementation of Contract search algorithm that searches based on logs, rather than blocks (unlike Ethereum), which should make searching much faster, and consume less disk space

Official Links for Fantom

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Official Website Link: https://www.fantom.foundation

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Official Github: https://github.com/Fantom-foundation

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