63 lines
2.8 KiB
Markdown
63 lines
2.8 KiB
Markdown
# eth-ipfs-state-validator
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[](https://goreportcard.com/report/github.com/vulcanize/eth-ipfs-state-validator)
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> Uses [ipfs-ethdb](https://github.com/vulcanize/ipfs-ethdb/tree/master/postgres) to validate completeness of IPFS Ethereum state data
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## Background
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State data on Ethereum takes the form of [Modified Merkle Patricia Tries](https://eth.wiki/en/fundamentals/patricia-tree).
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On disk each unique node of a trie is stored as a key-value pair between the Keccak256 hash of the RLP-encoded node and the RLP-encoded node.
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To prove the existence of a specific node in an MMPT with a known root hash, one provides a list of all of the nodes along the path descending
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from the root node to the node in question. To validate the completeness of a state database- to confirm every node for a state and/or storage trie(s) is present
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in a database- requires traversing the entire trie (or linked set of tries) and confirming the presence of every node in the database.
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## Usage
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`full` validates completeness of the entire state corresponding to a provided state root, including both state and storage tries
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`./eth-ipfs-state-validator validateTrie --ipfs-path={path to ipfs repo} --type=full --state-root={state root hex string}`
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`state` validates completeness of the state trie corresponding to a provided state root, excluding the storage tries
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`./eth-ipfs-state-validator validateTrie --ipfs-path={path to ipfs repo} --type=state --state-root={state root hex string}`
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`storage` validates completeness of only the storage trie corresponding to a provided storage root and contract address
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`./eth-ipfs-state-validator validateTrie --ipfs-path={path to ipfs repo} --type=storage --storage-root={state root hex string} --address={contract address hex string}`
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If an IPFS path is provided with the `--ipfs-path` flag, the validator operates through an IPFS block-service and expects a configured IPFS repository at
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the provided path. In this case, the validator will vie for contention on the lockfile located at the ipfs path.
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Alternatively, if no IPFS path is provided, the `--config` flag can be used to provide a path to a .toml config file with
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Postgres database connection parameters. In this case, the validator interfaces directly with the Postgres database and the
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database is assumed to be [IPFS-backing](https://github.com/ipfs/go-ds-sql).
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Postgres DB config:
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```toml
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[database]
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name = "vulcanize_public"
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hostname = "localhost"
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user = "postgres"
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password = ""
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port = 5432
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```
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## Maintainers
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@vulcanize
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@AFDudley
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@i-norden
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## Contributing
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Contributions are welcome!
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VulcanizeDB follows the [Contributor Covenant Code of Conduct](https://www.contributor-covenant.org/version/1/4/code-of-conduct).
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## License
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[AGPL-3.0](LICENSE) © Vulcanize Inc |