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# @polkadot/util

Various useful utility functions that are used across all projects in the [@polkadot](https://polkadot.js.org) namespace. It provides utility functions with additional safety checks, allowing not only for consistent coding, but also reducing the general boilerplate.

It is split up into a number of internal packages, namely utilities -

- [util](packages/util/) General utilities
- [util-crypto](packages/util-crypto/) Crypto and hashing utilities
- [util-keyring](packages/util-keyring/) Keyring management
- [util-rlp](packages/util-rlp/) RLP encoding & decoding

Various useful trie interfaces and utilities -

- [trie-db](packages/trie-db/) Merkle Patricia Tree implementation adapcted for Polkadot
- [trie-hash](packages/trie-hash/) Calculate hashes (either ordered or unordered) from a set of inputs

Type definitions for interfaces as exposed by Polkadot & Substrate clients -

- [@polkadot/extrinsics](packages/type-extrinsics/) Base extrinsic definitions & codecs
- [@polkadot/jsonrpc](packages/type-jsonrpc/) Definitions for JSONRPC endpoints
- [@polkadot/params](packages/type-params/) Input/output parameter formatting
- [@polkadot/primitives](packages/type-primitives/) Primitive type definitions, builder & codecs
- [@polkadot/storage](packages/type-storage/) Definitions for storage entries

## Contributing

- Bootstrap the dependencies, `yarn`
- Make any changes in the relevant package, on master merges new versions will be published automatically to npmjs