feat(EVES-003): add EVM/ERC-721 token metadata support#46
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feat(EVES-003): add EVM/ERC-721 token metadata support#46
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Extend EVES-003 to support EVM chains alongside the existing Tezos/TZIP-21 token metadata path, enabling minting simulation asset NFTs as ERC-721 tokens on Ethereum-compatible chains such as Etherlink L2, as anticipated by EVES-006 and EVES-007. Spec text (eves-003.md): - Add EVES-007 and EVES-008 to requires frontmatter - Add RFC 2119 boilerplate at top of Specification section - Add [29] RFC 1766 reference for language field - Generalize abstract to reference both TZIP-21 and ERC-721 - Branch Steps 2, 4, and 5 for chain-specific token metadata files - Add EVM contract identifier (Etherlink L2) to Section 5 - Restructure into parent "6. Token Metadata" section with subsections for TZIP-21 (Tezos) and ERC-721 (EVM) - Add ERC-721/OpenSea metadata mapping table with background_color, contributors, and language rows - Add language row to TZIP-21 mapping table (backed by TZIP-21 spec) - Clarify did:ethr as cross-chain organizational identity (EVES-008) - Add ERC-7572 contract-level metadata subsection - Recommend ERC-5192 for soulbound tokens, ERC-4906 for metadata update events - Fix ontology property paths to match current SHACL shapes - Migrate ontology IRIs to w3id.org (envited-x/v3, manifest/v5, hdmap/v6) Schemas: - Fix JSON Schema draft-07 $ref sibling bug (move title into asset definition) in both schemas - Replace "e.g." with "for example" in all schema descriptions - New erc721_token_metadata-schema.json (JSON Schema draft-07) - TZIP-21: add required ["name"], update minter to DID per EVES-008, fix RFC 1776 → RFC 1766 Examples: - New erc721_token_metadata.json with background_color "111827", ontology IRIs as trait_type (lossless mapping) - TZIP-21: update minter to did:ethr per EVES-008, migrate ontology IRIs - Manifest: fix @context to array-style, update gx namespace, fix hasLicense structure per manifest SHACL Closes #35 Signed-off-by: jdsika <carlo.van-driesten@vdl.digital>
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Summary
Extends EVES-003 to support EVM chains alongside the existing Tezos/TZIP-21 token metadata path, enabling minting simulation asset NFTs as ERC-721 tokens on Ethereum-compatible chains (for example, Etherlink L2).
background_color,contributors, andlanguagerowscontractURI()contract-level metadata subsection for EVM deploymentsexample/erc721_token_metadata.jsonwith ENVITED-X brandbackground_color(111827)erc721-schemas/erc721_token_metadata-schema.json(JSON Schema draft-07)Key design decisions
did:ethr(anchored on Base per EVES-008) is used as the minter DID for both Tezos and EVM tokens — it identifies the organization, not the minting chaintrait_typeand release URL asvalue(lossless mapping from TZIP-21name/value, no duplicate trait_types)titlemoved insideassetdefinition to avoid draft-07$refsibling keyword bugDepends on
fix/ci-and-lint-cleanupas base branchTest plan
make lintpasses (markdownlint + frontmatter validation)make format-checkpasses (Prettier)erc721_token_metadata.jsonvalidates againsterc721_token_metadata-schema.jsone.g.in any EVES-003 file (spec, schemas, examples)Closes #35