fed-sx-m1: Step 8c-post-publish-pure — nx_kernel pure orchestrator (new/3 + publish/2) + 12 tests
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82
next/kernel/nx_kernel.erl
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82
next/kernel/nx_kernel.erl
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-module(nx_kernel).
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-export([new/3, publish/2,
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actor_id/1, log_state/1, log_tip/1,
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key_spec/1, actor_state/1, projections/1,
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next_published/1, with_projections/2]).
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%% Kernel orchestrator — the long-lived runtime state held by the
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%% running fed-sx instance. The HTTP layer (Step 8c-post-publish
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%% follow-up) will park this in a gen_server and dispatch the POST
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%% /activity request through `publish/2`.
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%%
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%% State shape (property list):
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%% [{actor_id, A},
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%% {key_spec, KS}, % proplist: key_id / algorithm / value
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%% {actor_state, AS}, % proplist: public_keys
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%% {log, L}, % log:open/2 return value
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%% {projections, [Name]}, % list of registered projection process names
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%% {next_published, N}] % monotonic counter we feed as :published
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%%
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%% Step 6c's stage_replay catches duplicates by `:id`; the `:id`
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%% is derived from the unsigned envelope contents. Same Request +
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%% same `:published` -> same CID, so the next_published counter
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%% gives every publish a distinct timestamp without needing a
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%% wall-clock BIF.
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new(ActorId, KeySpec, ActorStateProplist) ->
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{ok, L0} = log:open(ActorId, base_stub()),
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[{actor_id, ActorId},
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{key_spec, KeySpec},
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{actor_state, ActorStateProplist},
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{log, L0},
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{projections, []},
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{next_published, 1}].
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%% publish/2 — pure state transition. Returns either:
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%% {ok, Result, NewState} — log + counter advanced
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%% {error, Reason, State} — state unchanged on validation halt
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publish(Request, State) ->
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P = field(next_published, State),
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Ctx = [{actor_id, field(actor_id, State)},
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{published, P},
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{key_spec, field(key_spec, State)},
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{actor_state, field(actor_state, State)},
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{log, field(log, State)},
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{projections, field(projections, State)}],
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case outbox:publish(Request, Ctx) of
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{ok, Result, NewLog} ->
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State1 = set(log, NewLog, State),
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State2 = set(next_published, P + 1, State1),
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{ok, Result, State2};
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{error, Reason, _} ->
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{error, Reason, State}
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end.
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%% Accessors
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actor_id(State) -> field(actor_id, State).
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key_spec(State) -> field(key_spec, State).
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actor_state(State) -> field(actor_state, State).
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log_state(State) -> field(log, State).
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log_tip(State) -> log:tip(field(log, State)).
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projections(State) -> field(projections, State).
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next_published(State) -> field(next_published, State).
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%% with_projections — return a new state with :projections replaced.
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with_projections(Names, State) ->
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set(projections, Names, State).
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%% Internal
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%% "base_stub" — placeholder base path for the in-memory log
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%% in v1 (the in-memory log ignores the base argument).
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base_stub() ->
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<<98,97,115,101,95,115,116,117,98>>.
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field(K, [{K, V} | _]) -> V;
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field(K, [_ | Rest]) -> field(K, Rest);
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field(_, []) -> nil.
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set(K, V, []) -> [{K, V}];
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set(K, V, [{K, _} | Rest]) -> [{K, V} | Rest];
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set(K, V, [P | Rest]) -> [P | set(K, V, Rest)].
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130
next/tests/nx_kernel_pure.sh
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130
next/tests/nx_kernel_pure.sh
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#!/usr/bin/env bash
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# next/tests/nx_kernel_pure.sh — Step 8c-post-publish-pure tests.
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#
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# Exercises pure-functional nx_kernel:new/3, publish/2, and the
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# accessors. Verifies the state advances correctly across multiple
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# publishes and that the next_published counter prevents replay
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# collisions when the same Request is published twice. 11 cases.
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set -uo pipefail
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cd "$(git rev-parse --show-toplevel)"
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SX_SERVER="${SX_SERVER:-hosts/ocaml/_build/default/bin/sx_server.exe}"
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if [ ! -x "$SX_SERVER" ]; then
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SX_SERVER="/root/rose-ash/hosts/ocaml/_build/default/bin/sx_server.exe"
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fi
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if [ ! -x "$SX_SERVER" ]; then
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echo "ERROR: sx_server.exe not found." >&2
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exit 1
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fi
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VERBOSE="${1:-}"
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PASS=0; FAIL=0; ERRORS=""
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TMPFILE=$(mktemp); trap "rm -f $TMPFILE" EXIT
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# Shared prelude: key material + actor state + an initial nx_kernel
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# state bound to S0. Each test builds from S0.
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PRELUDE='KM = <<1,2,3,4>>, KS = [{key_id,k1},{algorithm,ed25519},{value,KM}], AS = [{public_keys,[[{id,k1},{created,0},{value,KM}]]}], S0 = nx_kernel:new(alice, KS, AS), Req = [{type,create},{object,nil}],'
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cat > "$TMPFILE" <<EPOCHS
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(epoch 1)
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(load "lib/erlang/tokenizer.sx")
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(load "lib/erlang/parser.sx")
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(load "lib/erlang/parser-core.sx")
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(load "lib/erlang/parser-expr.sx")
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(load "lib/erlang/parser-module.sx")
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(load "lib/erlang/transpile.sx")
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(load "lib/erlang/runtime.sx")
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(load "lib/erlang/vm/dispatcher.sx")
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(epoch 2)
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(eval "(get (erlang-load-module (file-read \"next/kernel/envelope.erl\")) :name)")
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(epoch 3)
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(eval "(get (erlang-load-module (file-read \"next/kernel/log.erl\")) :name)")
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(epoch 4)
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(eval "(get (erlang-load-module (file-read \"next/kernel/pipeline.erl\")) :name)")
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(epoch 5)
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(eval "(get (erlang-load-module (file-read \"next/kernel/outbox.erl\")) :name)")
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(epoch 6)
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(eval "(get (erlang-load-module (file-read \"next/kernel/nx_kernel.erl\")) :name)")
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;; new/3 — fresh state has log_tip 0 and next_published 1
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(epoch 10)
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(eval "(erlang-eval-ast \"${PRELUDE} nx_kernel:log_tip(S0)\")")
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(epoch 11)
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(eval "(erlang-eval-ast \"${PRELUDE} nx_kernel:next_published(S0)\")")
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;; Accessors return the expected values
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(epoch 12)
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(eval "(get (erlang-eval-ast \"${PRELUDE} nx_kernel:actor_id(S0) =:= alice\") :name)")
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(epoch 13)
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(eval "(get (erlang-eval-ast \"${PRELUDE} nx_kernel:key_spec(S0) =:= KS\") :name)")
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(epoch 14)
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(eval "(get (erlang-eval-ast \"${PRELUDE} nx_kernel:actor_state(S0) =:= AS\") :name)")
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(epoch 15)
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(eval "(get (erlang-eval-ast \"${PRELUDE} nx_kernel:projections(S0) =:= []\") :name)")
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;; publish/2 happy path: log_tip advances to 1, next_published to 2
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(epoch 20)
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(eval "(get (erlang-eval-ast \"${PRELUDE} {ok, _, S1} = nx_kernel:publish(Req, S0), {nx_kernel:log_tip(S1), nx_kernel:next_published(S1)} =:= {1, 2}\") :name)")
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;; Two sequential publishes (same Request) succeed because the
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;; next_published counter makes each canonical envelope distinct
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(epoch 21)
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(eval "(erlang-eval-ast \"${PRELUDE} {ok, _, S1} = nx_kernel:publish(Req, S0), {ok, _, S2} = nx_kernel:publish(Req, S1), nx_kernel:log_tip(S2)\")")
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;; Two publishes also bump next_published to 3
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(epoch 22)
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(eval "(erlang-eval-ast \"${PRELUDE} {ok, _, S1} = nx_kernel:publish(Req, S0), {ok, _, S2} = nx_kernel:publish(Req, S1), nx_kernel:next_published(S2)\")")
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;; Bad key in state -> publish fails, state unchanged
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(epoch 23)
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(eval "(get (erlang-eval-ast \"${PRELUDE} OtherKM = <<9,9,9,9>>, BadKS = [{key_id,k1},{algorithm,ed25519},{value,OtherKM}], BadS = nx_kernel:new(alice, BadKS, AS), case nx_kernel:publish(Req, BadS) of {error, bad_signature, S} -> nx_kernel:log_tip(S) =:= 0; _ -> false end\") :name)")
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;; with_projections replaces the :projections list
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(epoch 24)
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(eval "(get (erlang-eval-ast \"${PRELUDE} S = nx_kernel:with_projections([p_count], S0), nx_kernel:projections(S) =:= [p_count]\") :name)")
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EPOCHS
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OUTPUT=$(timeout 240 "$SX_SERVER" < "$TMPFILE" 2>/dev/null)
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check() {
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local epoch="$1" desc="$2" expected="$3"
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local actual
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actual=$(echo "$OUTPUT" | awk -v e="$epoch" '
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$0 ~ "^\\(ok-len " e " " { getline; print; exit }
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$0 ~ "^\\(ok " e " " { print; exit }
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$0 ~ "^\\(error " e " " { print; exit }
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')
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[ -z "$actual" ] && actual="<no output for epoch $epoch>"
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if echo "$actual" | grep -qF -- "$expected"; then
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PASS=$((PASS+1))
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[ "$VERBOSE" = "-v" ] && echo " ok $desc"
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else
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FAIL=$((FAIL+1))
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ERRORS+=" FAIL [$desc] (epoch $epoch) expected: $expected | actual: $actual
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"
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fi
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}
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check 6 "nx_kernel module loaded" "nx_kernel"
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check 10 "fresh log_tip = 0" "0"
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check 11 "next_published starts at 1" "1"
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check 12 "actor_id accessor" "true"
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check 13 "key_spec accessor" "true"
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check 14 "actor_state accessor" "true"
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check 15 "projections defaults to []" "true"
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check 20 "publish advances tip + counter" "true"
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check 21 "two publishes advance tip to 2" "2"
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check 22 "two publishes -> counter = 3" "3"
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check 23 "bad key fails, state unchanged" "true"
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check 24 "with_projections sets list" "true"
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TOTAL=$((PASS+FAIL))
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if [ $FAIL -eq 0 ]; then
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echo "ok $PASS/$TOTAL next/tests/nx_kernel_pure.sh passed"
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else
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echo "FAIL $PASS/$TOTAL passed, $FAIL failed:"
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echo "$ERRORS"
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fi
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[ $FAIL -eq 0 ]
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