An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.

Top 2.8% on proxy.golang.org
Top 0.3% dependent packages on proxy.golang.org
Top 0.5% dependent repos on proxy.golang.org
Top 4.7% forks on proxy.golang.org
Top 1.1% docker downloads on proxy.golang.org

proxy.golang.org : github.com/filecoin-project/go-hamt-ipld/v2

Package hamt provides a reference implementation of the IPLD HAMT used in the Filecoin blockchain. It includes some optional flexibility such that it may be used for other purposes outside of Filecoin. HAMT is a "hash array mapped trie" https://en.wikipedia.org/wiki/Hash_array_mapped_trie. This implementation extends the standard form by including buckets for the key/value pairs at storage leaves and CHAMP mutation semantics https://michael.steindorfer.name/publications/oopsla15.pdf. The CHAMP invariant and mutation rules provide us with the ability to maintain canonical forms given any set of keys and their values, regardless of insertion order and intermediate data insertion and deletion. Therefore, for any given set of keys and their values, a HAMT using the same parameters and CHAMP semantics, the root node should always produce the same content identifier (CID). The HAMT algorithm hashes incoming keys and uses incrementing subsections of that hash digest at each level of its tree structure to determine the placement of either the entry or a link to a child node of the tree. A `bitWidth` determines the number of bits of the hash to use for index calculation at each level of the tree such that the root node takes the first `bitWidth` bits of the hash to calculate an index and as we move lower in the tree, we move along the hash by `depth x bitWidth` bits. In this way, a sufficiently randomizing hash function will generate a hash that provides a new index at each level of the data structure. An index comprising `bitWidth` bits will generate index values of `[ 0, 2^bitWidth )`. So a `bitWidth` of 8 will generate indexes of 0 to 255 inclusive. Each node in the tree can therefore hold up to `2^bitWidth` elements of data, which we store in an array. In the this HAMT and the IPLD HashMap we store entries in buckets. A `Set(key, value)` mutation where the index generated at the root node for the hash of key denotes an array index that does not yet contain an entry, we create a new bucket and insert the key / value pair entry. In this way, a single node can theoretically hold up to `2^bitWidth x bucketSize` entries, where `bucketSize` is the maximum number of elements a bucket is allowed to contain ("collisions"). In practice, indexes do not distribute with perfect randomness so this maximum is theoretical. Entries stored in the node's buckets are stored in key-sorted order. This HAMT implementation: • Fixes the `bucketSize` to 3. • Defaults the `bitWidth` to 8, however within Filecoin it uses 5 • Defaults the hash algorithm to the 64-bit variant of Murmur3-x64 The algorithm used here is identical to that of the IPLD HashMap algorithm specified at https://github.com/ipld/specs/blob/master/data-structures/hashmap.md. The specific parameters used by Filecoin and the DAG-CBOR block layout differ from the specification and are defined at https://github.com/ipld/specs/blob/master/data-structures/hashmap.md#Appendix-Filecoin-hamt-variant.

Registry - Source - Documentation - JSON
purl: pkg:golang/github.com/filecoin-project/go-hamt-ipld/v2
License: MIT
Latest release: almost 5 years ago
First release: almost 5 years ago
Namespace: github.com/filecoin-project/go-hamt-ipld
Dependent packages: 198
Dependent repositories: 190
Stars: 28 on GitHub
Forks: 23 on GitHub
Docker dependents: 14
Docker downloads: 18,037
See more repository details: repos.ecosyste.ms
Last synced: 16 days ago

Top 7.4% on proxy.golang.org
github.com/Schwartz10/cli/v2 v2.2.1
Copyright © 2023 NAME HERE <EMAIL ADDRESS> Licensed under the Apache License, Version 2.0 (the "...
7 versions - Latest release: about 1 year ago - 0 stars on GitHub
Top 7.4% on proxy.golang.org
github.com/schwartz10/cli/v2 v2.2.1
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34 versions - Latest release: about 1 year ago
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github.com/swanchain/ubi-benchmark v0.0.1
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1 version - Latest release: over 1 year ago - 0 stars on GitHub
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281 versions - Latest release: over 1 year ago - 0 stars on GitHub
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281 versions - Latest release: over 1 year ago - 0 stars on GitHub
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55 versions - Latest release: over 1 year ago - 1 dependent package - 1,978 stars on GitHub
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Compare the apis of venus and lotus
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34 versions - Latest release: over 1 year ago - 6 dependent packages - 6 dependent repositories - 2 stars on GitHub
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60 versions - Latest release: over 1 year ago - 1 dependent repositories - 10 stars on GitHub
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9 versions - Latest release: over 1 year ago - 3 stars on GitHub
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9 versions - Latest release: over 1 year ago - 4 stars on GitHub
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venus-tool
8 versions - Latest release: over 1 year ago - 2 stars on GitHub
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:motorcycle: Accelerating Data onto FileCoin
1 version - Latest release: over 1 year ago - 22 stars on GitHub
github.com/ipfs-force-community/api-compare v0.0.0-20231113023235-d006c2033ea1
Compare the apis of venus and lotus
1 version - Latest release: over 1 year ago - 0 stars on GitHub
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github.com/glifio/glif v1.0.3
Copyright © 2023 NAME HERE <EMAIL ADDRESS> Licensed under the Apache License, Version 2.0 (the "...
5 versions - Latest release: over 1 year ago - 6 stars on GitHub
github.com/glifio/cli v1.0.3
Copyright © 2023 NAME HERE <EMAIL ADDRESS> Licensed under the Apache License, Version 2.0 (the "...
6 versions - Latest release: over 1 year ago - 1 dependent repositories - 4 stars on GitHub
Top 7.4% on proxy.golang.org
github.com/Schwartz10/cli v1.0.3
5 versions - Latest release: over 1 year ago - 0 stars on GitHub
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Top 9.6% on proxy.golang.org
git.sxxfuture.net/filfi/letsfil/letsfil-collector v0.0.4
4 versions - Latest release: over 1 year ago - 0 stars on git.sxxfuture.net
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1 version - Latest release: over 1 year ago - 0 stars on GitHub
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IPEHR-gateway is a solution to provide benefits of decentralized architecture to common HMS apps ...
15 versions - Latest release: over 1 year ago - 1 dependent package - 1 dependent repositories - 8 stars on GitHub
github.com/filecoin-project/lily-archiver v0.0.0-20230823064334-6c9f11be646c
Produces regular archives of on-chain state for the Filecoin network.
2 versions - Latest release: almost 2 years ago - 3 stars on GitHub
Top 2.6% on proxy.golang.org
github.com/filecoin-project/boost v1.7.5
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49 versions - Latest release: almost 2 years ago - 20 dependent packages - 6 dependent repositories - 77 stars on GitHub
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49 versions - Latest release: almost 2 years ago - 0 stars on GitHub
Top 9.8% on proxy.golang.org
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9 versions - Latest release: almost 2 years ago - 16 stars on GitHub
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6 versions - Latest release: almost 2 years ago - 1 stars on GitHub
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Go types for IPC
12 versions - Latest release: almost 2 years ago - 1 dependent package - 0 stars on GitHub
Top 6.7% on proxy.golang.org
github.com/pando-project/pando v0.0.0-20230707113127-a919e66ced81
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3 versions - Latest release: almost 2 years ago - 21 stars on GitHub
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2 versions - Latest release: about 2 years ago - 0 stars on GitHub
Top 5.9% on proxy.golang.org
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63 versions - Latest release: about 2 years ago - 1 dependent repositories - 16 stars on GitHub
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Top 9.8% on proxy.golang.org
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1 version - Latest release: about 2 years ago - 5 stars on GitHub
Top 8.2% on proxy.golang.org
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4 versions - Latest release: about 2 years ago - 0 stars on GitHub
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2 versions - Latest release: about 2 years ago - 8 stars on GitHub
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1 version - Latest release: about 2 years ago - 3 stars on GitHub
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Explore Filecoin State
3 versions - Latest release: about 2 years ago - 5 stars on GitHub
Top 10.0% on proxy.golang.org
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Copyright © 2021 NAME HERE [email protected] Licensed under the Apache License, Version 2.0 (the "L...
1 version - Latest release: about 2 years ago
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1 version - Latest release: about 2 years ago
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22 versions - Latest release: about 2 years ago - 2 stars on GitHub
Top 8.7% on proxy.golang.org
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1 version - Latest release: about 2 years ago
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Copyright © 2021 NAME HERE <EMAIL ADDRESS> Licensed under the Apache License, Version 2.0 (the "...
3 versions - Latest release: about 2 years ago - 0 stars on GitHub
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Top 3.7% on proxy.golang.org
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34 versions - Latest release: over 2 years ago - 1 dependent package - 1 dependent repositories - 217 stars on GitHub
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33 versions - Latest release: over 2 years ago
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18 versions - Latest release: over 2 years ago - 20 stars on GitHub
github.com/jimpick/sp-kyc-checks v0.0.0-20230201194251-fa84fca72da8
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1 version - Latest release: over 2 years ago - 0 stars on GitHub
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5 versions - Latest release: over 2 years ago - 0 stars on GitHub
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rewrite
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2 versions - Latest release: over 2 years ago - 1 dependent package - 7 stars on
Top 7.5% on proxy.golang.org
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2 versions - Latest release: over 2 years ago - 5 stars on GitHub
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5 versions - Latest release: over 2 years ago
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5 versions - Latest release: over 2 years ago - 7 dependent packages - 3 dependent repositories - 42 stars on GitHub
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Top 9.0% on proxy.golang.org
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179 versions - Latest release: almost 3 years ago - 0 stars on GitHub
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github.com/frrist/fil-chain-export v0.0.0-20220823163551-6258b42cd504
Utility for exporting the filecoin blockchain from a blockstore
1 version - Latest release: almost 3 years ago - 0 stars on GitHub
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173 versions - Latest release: almost 3 years ago
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