ERC1319: Package Registry Standard

An ethPM registry is an on-chain datastore for package releases. For each package release, three pieces of information are committed to storage:

• a package name

• a package version

• the content-addressed URI associated with the package's manifest.

ERC1319 was written to define the API for an on-chain ethPM registry. It is the minimum feasible API for a registry to interoperate with various ethPM tooling. It is encouraged for people to build their own registry implementations that extend upon the standard to support any kind of specialized behavior.

Reference Registry Implementations

There are a couple different implementations of ERC1319 available.

• Escape-Truffle

  • Solidity implementation with release deletion (but prevents re-releasing the same package version)

• Simple Registry

  • Solidity implementation without release deletion

• Vyper (experimental)

  • with release deletion

  • without release deletion

Deploying your own registry.

ethPM-CLI provides a simple command deploy the Simple Registry to any blockchain.

Escape-Truffle provides this script to assist with deploying its series of smart contracts.

Package Naming and Versioning

As of ethPM V3, the name and version field of a manifest are no longer strictly required. Best practice is that every package should define these in their manifest. Some tooling may even go as far as requiring these fields are defined before cutting a release. When a package is released on a registry, users must provide an official name and version under which to identify a release on the blockchain. The following table defines how a package should be identified, considering the various cases when manifest defines / omits the name and version, and whether or not the manifest is stored on an on-chain registry.

	Manifest contains name and version	Manifest omits name and version
Sourced from registry	Manifest name, version must match registry name, version	Registry name, version is valid identifier
Not sourced from registry	Manifest name, version is the valid identifier	Ambiguous, user must define name, version