[meta] NEAR Support

[maoueh]

This is a meta issue listing the actual work required to fully support NEAR inside the The Graph.

Depends

• 2716

Tasks

• [x] Ensure graph-node is really multi-chain ready (data sources and manifest parsing/instantiation were discussed as potential missing area)
• [x] Add basic chain/near package fulfilling Blockchain trait (will probably start with POC mappings for now, maybe just block header or even just logs as String).
• [x] Ensure NEAR on StreamingFast works when block(s) are skipped.
• [x] Discuss & define requirements for mappings
• [x] Add graph-node support (filtering, mappings) for Block handlers
• [x] Add graph-node support for Receipt handlers
• [ ] Add graph-node support for FunctionCall handlers (extension)
• [x] Update manifest validation to support NEAR datasources
• [x] codegen and build adjustments for NEAR on graph-cli - https://github.com/graphprotocol/graph-cli/issues/734
• [ ] graph init changes for NEAR -> change the workflow to switch the ABI fetch (and others to come here)
• [x] Add NEAR chain to graph-ts https://github.com/graphprotocol/graph-ts/issues/209

Release:

• [x] Alpha preview testing for early tester(s)
• [ ] Finalise NEAR for Graph Node GIP
• [x] Documentation modifications for NEAR support
• [x] Fix all FIXME (NEAR) in the codebase
• [x] Discuss and decide how hosted NEAR beta version will be operationalized
• [x] Beta testing on hosted environment

[azf20]

Closing this as the MVP is complete, and the remaining items are tracked separately. Great stuff!