feat(antd-java): 07_external_signer example (V2-312, 6/15)#102
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Adds web3j 4.12.3 as a dependency of the examples project. The Example07ExternalSigner class exercises both flows against ant dev start --enable-evm using anvil deterministic account #0. Validated end-to-end on dev2: File: 4 payments, data_map=7d0a1d5c... Chunk: 1 payment, address=c7482606... Key web3j 4.x idiom captured in code: when the tuple has all static-size fields (address, uint256, bytes32) the struct class MUST extend StaticStruct, not DynamicStruct. Inheriting DynamicStruct causes web3j to insert per-struct offset+length prefixes in the encoded calldata (extra 32B per struct), which the contract rejects as a malformed-args mismatch. Selector is correct in both cases (0xb6c2141b), so the bug is silent until you hit a revert. RawTransactionManager + manual receipt polling avoids the TransactionReceiptProcessor's default 15s wait per attempt, which is sluggish against anvil's instant-mining. Wires up ant-dev java adapter's external_signer entry.
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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Sixth SDK example for V2-312. Uses web3j 4.12.3 (
org.web3j:coreMaven artifact).What this adds
antd-java/examples/src/main/java/com/autonomi/examples/Example07ExternalSigner.java— exercises both flows with a smallDataPaymentstruct (extendsStaticStruct— see gotcha below) andFunctionEncoder+RawTransactionManagerfor the on-chain sideantd-java/examples/build.gradle.kts— addsorg.web3j:core:4.12.3to the examples projectValidation
End-to-end against
ant dev start --enable-evmon dev2:Web3j gotcha worth flagging for the Kotlin fan-out (which will share the lib)
StaticStructvsDynamicStruct— when the tuple has all static-size fields (address, uint256, bytes32), the struct class must extendStaticStruct. InheritingDynamicStructcauses web3j to insert per-struct offset+length prefixes in the encoded calldata (an extra 32B per struct), which the contract decodes as malformed and reverts. The selector is correct in both cases (0xb6c2141b), so the bug is silent until you hit a revert.Caught by diffing the calldata length: 580 bytes vs the expected 452 = 4 (selector) + 32 (array offset) + 32 (array length) + 4 × 96 (each DataPayment static).
Closes 6/15 of V2-312.