ProofedMesh/services/attest-reconciler/internal/attest/hash.go
CTO 2e44147a71
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services: add attest-reconciler Go service (periodic worker re-signs per_diem_rates rows without rate_change_attestation_ref via Signer+TLog, 11/11 go tests pass, go vet clean)
- services/attest-reconciler/ as its own go.mod (admin-api internal/ is not importable; shared code gets extracted when a 3rd consumer appears).
- Scheduler accepts "@every <dur>" or a bare Go duration; context-cancellation stops the loop cleanly.
- Store client defines PendingRateStore + Postgres skeleton for SELECT ... WHERE rate_change_attestation_ref IS NULL.
- Orchestrator + HTTPSigner + tlog.HTTPSubmitter mirror admin-api byte-for-byte so the TLog idempotency key collides on resubmits (kein Doppelsignieren).
- Prometheus text-format /metrics endpoint, dependency-free: attest_reconciler_dirty_rows_total, _reconciliation_attempts_total, _reconciliation_failures_total, _idempotent_noop_total.
- Tests with fake store + fake signer + fake submitter cover: happy path, already-attested rows are NOT re-signed, TLog idempotency across ticks, TLog-down failure path, pre-cancelled ctx.
- Top-level README reflects the new service; CI auto-discovers services/*/go.mod so no workflow change needed.

Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-10-25 18:06:36 +00:00

83 lines
1.5 KiB
Go

package attest
import (
"bytes"
"crypto/sha256"
"encoding/hex"
"encoding/json"
"fmt"
"sort"
)
func sha256hex(b []byte) string {
sum := sha256.Sum256(b)
return hex.EncodeToString(sum[:])
}
func canonicalJSON(v any) ([]byte, error) {
first, err := json.Marshal(v)
if err != nil {
return nil, err
}
var any_ any
if err := json.Unmarshal(first, &any_); err != nil {
return nil, err
}
var buf bytes.Buffer
if err := writeSorted(&buf, any_); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func writeSorted(buf *bytes.Buffer, v any) error {
switch x := v.(type) {
case nil:
buf.WriteString("null")
case bool:
if x {
buf.WriteString("true")
} else {
buf.WriteString("false")
}
case float64:
b, _ := json.Marshal(x)
buf.Write(b)
case string:
b, _ := json.Marshal(x)
buf.Write(b)
case []any:
buf.WriteByte('[')
for i, el := range x {
if i > 0 {
buf.WriteByte(',')
}
if err := writeSorted(buf, el); err != nil {
return err
}
}
buf.WriteByte(']')
case map[string]any:
keys := make([]string, 0, len(x))
for k := range x {
keys = append(keys, k)
}
sort.Strings(keys)
buf.WriteByte('{')
for i, k := range keys {
if i > 0 {
buf.WriteByte(',')
}
kb, _ := json.Marshal(k)
buf.Write(kb)
buf.WriteByte(':')
if err := writeSorted(buf, x[k]); err != nil {
return err
}
}
buf.WriteByte('}')
default:
return fmt.Errorf("writeSorted: unsupported type %T", v)
}
return nil
}