feat(antd-js): 07-external-signer example (V2-312, 2/15)#99
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Mirrors antd-py's 07_external_signer in TypeScript using ethers v6. Both
flows validated end-to-end against ant dev start --enable-evm on dev2:
File: 4 payments, dataMapAddress=c135f334...
Chunk: 1 payment, address=c5c96c8a...
Notable patterns for the 14 SDKs to follow:
1. Per-language distinct file/chunk content ("hello external signer from
js (file)" vs antd-py's "... (file)"). When the chain has been used
for a prior SDK's validation run, the same content hashes to chunks
already on-network and prep returns empty payments. Distinct content
forces a fresh payment flow.
2. Empty-payments short-circuit: `if (prep.payments.length === 0) return {}`
(mirrored in antd-py for consistency). The daemon's prepare elides
zero-amount entries when chunks are already-stored; finalize accepts
an empty tx_hashes dict.
3. NonceManager wrapper for ethers v6 — provider.getTransactionCount can
lag across back-to-back txs even after await tx.wait(). NonceManager
tracks locally, no provider round-trip per call.
Adds ethers ^6.13 as a devDependency of antd-js (no other web3 deps in the
package; pulled in only for the example).
Also adds the js adapter's `external_signer` short-name to ant-dev's
example dispatcher.
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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Second of 15 SDK examples for V2-312. antd-js is the canonical TypeScript reference; the remaining 13 SDKs follow.
What this adds
antd-js/examples/07-external-signer.ts— TypeScript example exercising both V2-312 flows end-to-end using ethers v6antd-js/package.json— addsethers ^6.13as a devDependency (no other web3 deps in the package; pulled in only for the example)ant-dev/src/ant_dev/cmd_example.py— addsexternal_signerto the js adapterantd-py/examples/07_external_signer.py— empty-payments short-circuit fix (mirrored across both examples for consistency)Validation
Validated against
ant dev start --enable-evmon dev2:Patterns for the remaining 13 SDKs
Validation surfaced two gotchas worth flagging up-front:
Per-language distinct content. Use
hello external signer from <lang>so each SDK exercises a fresh payment flow on a shared anvil instance. Otherwise the daemon's prepare step elides zero-amount entries (chunks already-stored) and the example never gets to exercise the payment surface.Empty-payments short-circuit.
if (prep.payments.length === 0) return {}— handles the already-stored case generally. Daemon accepts emptytx_hashesfor finalize. Worth replicating across all 14 SDK examples.Nonce management. ethers v6 needs
NonceManagerto avoid stale-nonce races on back-to-back contract calls;provider.getTransactionCountcan lag even afterawait tx.wait(). web3.py handles it implicitly via explicitnonce=per build_transaction. SDKs using other libs (web3j, Nethereum, alloy, etc.) will need to check their library's idiom — flagging as a likely papercut.Closes 2/15 of V2-312.