feat(antd-py): 07_external_signer example (V2-312, 1/15)#98
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…(V2-312) Adds the first of 15 SDK examples for the external-signer flow added in PR #90. Exercises both round-trips against `ant dev start --enable-evm`: 1. Public file upload: prepare_upload_public -> approve+payForQuotes -> finalize_upload -> file_download_public, byte-equal assert. 2. Single-chunk publish: prepare_chunk_upload -> approve+payForQuotes -> finalize_chunk_upload -> chunk_get, byte-equal assert. Includes the already_stored short-circuit branch. Loads the bundled IPaymentVault.json (committed in V2-311) from docs/abi/. Signs with anvil deterministic account #0; keys never leave the SDK process - the daemon's only role is to hand over the PaymentIntent and accept tx hashes on finalize. Validated end-to-end on dev2: File: 4 chunks, data_map 57d41c2d..., total 0.059 antToken Chunk: 1 payment, addr 57060540..., round-trip OK Adds the python adapter's `external_signer` short-name; `ant dev example external_signer -l python` and `ant dev example all -l python` now pick it up. Other 14 SDKs follow as separate fan-out PRs.
Nic-dorman
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May 21, 2026
Cuts v0.8.0 atop v0.7.1. Substantial breaking-change roll-up of the put/get rename, the private-file PUT/GET gap close, and several minor surface cleanups -- bundled here so the v1.0 cut can ship stable on top. ## Breaking (antd daemon) - feat(antd)!: bind to 127.0.0.1 by default on REST and gRPC (#107). Previously bound 0.0.0.0; use --bind-rest / --bind-grpc to override. - chore: remove dead graph_entry surface from antd proto + 5 SDKs (#92). GraphService and its 4 RPCs are gone; REST mounts dropped. - chore: remove dir_upload_public / dir_download_public surface (#95). Use file_put_public on a directory path instead; the daemon recurses. - feat(antd)!: normalize put/get convention + close private-file PUT and GET gaps (#115). Method renames across proto + REST + SDKs: data_put_private -> data_put data_get_private -> data_get file_upload_public -> file_put_public file_download_public -> file_get_public New: file_put / file_get for the private file path (previously only the public variant existed). New typed results: DataPutResult, DataPutPublicResult, FilePutResult, FilePutPublicResult; PutResult is now annotated as chunk_put only. ## Additive - feat(antd): honor payment_mode on gRPC put/cost paths and REST cost endpoints (#114). Optional kwarg threaded through every put/cost signature; empty/omitted maps to "auto" so older clients keep working. - feat: external-signer public uploads + single-chunk prepare/finalize across 15 SDKs (#90). - docs+spec: openapi.yaml refreshed for the v1.0 surface, including POST /v1/chunks/prepare and /v1/chunks/finalize for single-chunk external-signer publish (#126). ## SDK fan-out (PaymentMode + put/get convention, all 15) #116 antd-go, #117 antd-py/ruby/elixir, #118 antd-rust, #119 antd-csharp, #120 antd-java, #121 antd-swift, #122 antd-dart, #123 antd-kotlin, #124 antd-cpp, #125 antd-js/php/zig/lua, #127 antd-mcp. ## SDK example + build fixes - fix(antd-go): make 03-files example self-contained and runnable (#91) - fix(examples): make 04-files runnable across cpp/rust/elixir/lua/php/ruby/zig (#93) - fix(examples): runnable dart 04_files + java Example03Files; add java Example03Chunks (#94) - feat: gRPC transport example for antd-py and antd-rust (#113) - feat(antd-py): 07_external_signer example + ant-dev dispatcher entry (#98) - feat(antd-js): 07-external-signer example + antd-py empty-payments fix (#99) - feat(rust/go): 07-external-signer examples (#100) - feat(antd-csharp): 07_external_signer example (#101) - feat(antd-java): 07_external_signer example (#102) - feat(antd-kotlin): 07_external_signer example (#103) - feat(antd-dart): 07_external_signer example (#104) - feat(antd-ruby): 07_external_signer example (#105) - feat(antd-php): 07_external_signer example (#106) - chore(antd-kotlin): drop stale GraphDescendant from local proto copy (#108) ## Docs / infra - docs: external-signer flow reference + ABI + python smoke test (#97) - docs: add SECURITY.md with threat model and disclosure policy (#109) - docs!: refresh per-SDK READMEs + llms-full.txt + openapi.yaml for v1.0 surface (#126) - ci: add Go lint + test + vuln scanning for antd-go (#112) - ci: extend antd-rust to sibling-repo parity (fmt + clippy + audit + doc) (#111) - ci: skip antd/openapi.yaml and llms-full.txt from triggering CI (#128) - chore(scripts): add full-stack + integration sweep helpers (#96) - fix(antd-rust): regenerate Cargo.lock to unbreak --locked CI (#110) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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First of the 15 SDK examples for V2-312 — antd-py is the canonical reference; the remaining 14 SDKs follow in separate PRs.
What this adds
antd-py/examples/07_external_signer.py— runnable example exercising both V2-312 flows end-to-end:prepare_upload_public→ approve + payForQuotes →finalize_upload→file_download_public→ byte-equal assertprepare_chunk_upload→ approve + payForQuotes →finalize_chunk_upload→chunk_get→ byte-equal assert (withalready_storedshort-circuit branch)ant-dev/src/ant_dev/cmd_example.py— addsexternal_signerto the python adapter's example mapping.ant dev example external_signer -l pythonandant dev example all -l pythonnow pick it up.Validation
Validated against
ant dev start --enable-evmon dev2:Notes for the other 14 SDKs
docs/abi/IPaymentVault.jsonfrom V2-311 (PR docs: external-signer flow reference + ABI + python smoke test (V2-311) #97). Other SDKs that load JSON ABIs into their web3 lib can do the same; SDKs that hand-roll the function signatures should use the selectors fromdocs/external-signer-flow.md.payForQuotestx hash gets reused as the value for everyquote_hashkey in thetx_hashesdict — confirmed working via the 4-quote file upload above.Closes 1/15 of V2-312.