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CHANGELOG.md
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CHANGELOG.md
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# lotus changelog
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# Lotus changelog
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## 0.5.0 / 2020-08-2020
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This version of Lotus will be used for the incentivized testnet Space Race competition,
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and can be considered mainnet-ready code. It includes some protocol
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changes, upgrades of core dependencies, and various bugfixes and UX/performance improvements.
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# Highlights
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Among the highlights included in this release are:
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- Gas changes: We implemented EIP-1559 and introduced real gas values.
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- Deal-making: We now support "Committed Capacity" sectors, "fast-retrieval" deals,
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and the packing of multiple deals into a single sector.
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- Renamed features: We renamed some of the binaries, environment variables, and default
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paths associated with a Lotus node.
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## Gas changes
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We made some significant changes to the mechanics of gas in this release.
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#### Network fee
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We implemented something similar to
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[Ethereum's EIP-1559](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md).
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The `Message` structure had three changes:
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- The `GasPrice` field has been removed
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- A new `GasFeeCap` field has been added, which controls the maximum cost
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the sender incurs for the message
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- A new `GasPremium` field has been added, which controls the reward a miner
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earns for including the message
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A sender will never be charged more than `GasFeeCap * GasLimit`.
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A miner will typically earn `GasPremium * GasLimit` as a reward.
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The `Blockheader` structure has one new field, called `ParentBaseFee`.
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Informally speaking,the `ParentBaseFee`
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is increased when blocks are densely packed with messages, and decreased otherwise.
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The `ParentBaseFee` is used when calculating how much a sender burns when executing a message. _Burning_ simply refers to sending attoFIL to a dedicated, unreachable account.
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A message causes `ParentBaseFee * GasUsed` attoFIL to be burnt.
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#### Real gas values
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This release also includes our first "real" gas costs for primitive operations.
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The costs were designed to account for both the _time_ that message execution takes,
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as well as the _space_ a message adds to the state tree.
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## Deal-making changes
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There are three key changes to the deal-making process.
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#### Committed Capacity sectors
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Miners can now pledge "Committed Capacity" (CC) sectors, which are explicitly
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stated as containing junk data, and must not include any deals. Miners can do this
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to increase their storage power, and win block rewards from this pledged storage.
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They can mark these sectors as "upgradable" with `lotus-miner sectors mark-for-upgrade`.
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If the miner receives and accepts one or more storage deals, the sector that includes
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those deals will _replace_ the CC sector. This is intended to maximize the amount of useful
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storage on the Filecoin network.
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#### Fast-retrieval deals
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Clients can now include a `fast-retrieval` flag when proposing deals with storage miners.
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If set to true, the miner will include an extra copy of the deal data. This
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data can be quickly served in a retrieval deal, since it will not need to be unsealed.
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#### Multiple deals per sector
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Miners can now pack multiple deals into a single sector, so long as all the deals
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fit into the sector capacity. This should increase the packing efficiency of miners.
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## Renamed features
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To improve the user experience, we updated several names to mainatin
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standard prefixing, and to better reflect the meaning of the features being referenced.
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In particular, the Lotus miner binary is now called `lotus-miner`, the default
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path for miner data is now `~/.lotusminer`, and the environment variable
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that sets the path for miner data is now `$LOTUS_MINER_PATH`. A full list of renamed
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features can be found [here](https://github.com/filecoin-project/lotus/issues/2304).
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# Changelog
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#### Downstream upgrades
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- Upgrades markets to v0.5.6 (https://github.com/filecoin-project/lotus/pull/3058)
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- Upgrades specs-actors to v0.9.3 (https://github.com/filecoin-project/lotus/pull/3151)
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#### Core protocol
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- Introduces gas values, replacing placeholders (https://github.com/filecoin-project/lotus/pull/2343)
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- Implements EIP-1559, introducing a network base fee, message gas fee cap, and message gas fee premium (https://github.com/filecoin-project/lotus/pull/2874)
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- Implements Poisson Sortition for elections (https://github.com/filecoin-project/lotus/pull/2084)
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#### Deal-making lifecycle
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- Introduces "Committed Capacity" sectors (https://github.com/filecoin-project/lotus/pull/2220)
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- Introduces "fast-retrieval" flag for deals (https://github.com/filecoin-project/lotus/pull/2323
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- Supports packing multiple deals into one sector (https://github.com/filecoin-project/storage-fsm/pull/38)
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#### Enhancements
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- Optimized message pool selection logic (https://github.com/filecoin-project/lotus/pull/2838)
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- Window-based scheduling of sealing tasks (https://github.com/filecoin-project/sector-storage/pull/67)
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- Faster window PoSt (https://github.com/filecoin-project/lotus/pull/2209/files)
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- Refactors the payment channel manager (https://github.com/filecoin-project/lotus/pull/2640)
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- Refactors blocksync (https://github.com/filecoin-project/lotus/pull/2715/files)
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#### UX
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- Provide status updates for data-transfer (https://github.com/filecoin-project/lotus/pull/3162, https://github.com/filecoin-project/lotus/pull/3191)
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- Miners can customise asks (https://github.com/filecoin-project/lotus/pull/2046)
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- Miners can toggle auto-acceptance of deals (https://github.com/filecoin-project/lotus/pull/1994)
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- Miners can maintain a blocklist of piece CIDs (https://github.com/filecoin-project/lotus/pull/2069)
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# Contributors
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The following contributors had 10 or more commits go into this release.
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We are grateful for every contribution!
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| Contributor | Commits | Lines ± |
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|--------------------|---------|---------------|
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| magik6k | 361 | +13197/-6136 |
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| Kubuxu | 227 | +5670/-2587 |
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| arajasek | 120 | +2916/-1264 |
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| whyrusleeping | 112 | +3979/-1089 |
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| vyzo | 99 | +3343/-1305 |
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| dirkmc | 68 | +8732/-3621 |
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| laser | 45 | +1489/-501 |
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| hannahhoward | 43 | +2654/-990 |
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| frrist | 37 | +6630/-4338 |
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| schomatis | 28 | +3016/-1368 |
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| placer14 | 27 | +824/-350 |
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| raulk | 25 | +28718/-29849 |
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| mrsmkl | 22 | +560/-368 |
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| travisperson | 18 | +1354/-314 |
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| nonsense | 16 | +2956/-2842 |
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| ingar | 13 | +331/-123 |
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| daviddias | 11 | +311/-11 |
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| Stebalien | 11 | +1204/-980 |
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| RobQuistNL | 10 | +69/-74 |
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## 0.1.0 / 2019-12-11
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