chore: initial commit for v0.0.1
DChain single-node blockchain + React Native messenger client. Core: - PBFT consensus with multi-sig validator admission + equivocation slashing - BadgerDB + schema migration scaffold (CurrentSchemaVersion=0) - libp2p gossipsub (tx/v1, blocks/v1, relay/v1, version/v1) - Native Go contracts (username_registry) alongside WASM (wazero) - WebSocket gateway with topic-based fanout + Ed25519-nonce auth - Relay mailbox with NaCl envelope encryption (X25519 + Ed25519) - Prometheus /metrics, per-IP rate limit, body-size cap Deployment: - Single-node compose (deploy/single/) with Caddy TLS + optional Prometheus - 3-node dev compose (docker-compose.yml) with mocked internet topology - 3-validator prod compose (deploy/prod/) for federation - Auto-update from Gitea via /api/update-check + systemd timer - Build-time version injection (ldflags → node --version) - UI / Swagger toggle flags (DCHAIN_DISABLE_UI, DCHAIN_DISABLE_SWAGGER) Client (client-app/): - Expo / React Native / NativeWind - E2E NaCl encryption, typing indicator, contact requests - Auto-discovery of canonical contracts, chain_id aware, WS reconnect on node switch Documentation: - README.md, CHANGELOG.md, CONTEXT.md - deploy/single/README.md with 6 operator scenarios - deploy/UPDATE_STRATEGY.md with 4-layer forward-compat design - docs/contracts/*.md per contract
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vsecoder
102
contracts/counter/counter.wat
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102
contracts/counter/counter.wat
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@@ -0,0 +1,102 @@
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(module
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;; Counter smart contract — methods: increment, get, reset
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;; State key "counter" stores uint64 as 8-byte big-endian.
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;; State key "owner" stores the deployer pub key set on first reset() call.
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;; ── imports ──────────────────────────────────────────────────────────────
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(import "env" "put_u64"
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(func $put_u64 (param i32 i32 i64)))
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(import "env" "get_u64"
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(func $get_u64 (param i32 i32) (result i64)))
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(import "env" "get_caller"
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(func $get_caller (param i32 i32) (result i32)))
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(import "env" "get_state"
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(func $get_state (param i32 i32 i32 i32) (result i32)))
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(import "env" "set_state"
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(func $set_state (param i32 i32 i32 i32)))
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(import "env" "log"
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(func $log (param i32 i32)))
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;; ── memory ───────────────────────────────────────────────────────────────
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;; Memory layout:
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;; offset 0 : "counter" (7 bytes) — state key for the counter value
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;; offset 16 : "owner" (5 bytes) — state key for the owner pub key
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;; offset 32 : caller buffer (128 bytes)
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;; offset 160 : owner buffer (128 bytes)
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;; offset 288 : log messages
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(memory (export "memory") 1)
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(data (i32.const 0) "counter")
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(data (i32.const 16) "owner")
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(data (i32.const 288) "incremented")
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(data (i32.const 300) "get called")
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(data (i32.const 310) "reset")
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(data (i32.const 316) "unauthorized")
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(data (i32.const 329) "reset ok")
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;; ── increment() ──────────────────────────────────────────────────────────
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(func (export "increment")
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(local $val i64)
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(local.set $val (call $get_u64 (i32.const 0) (i32.const 7)))
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(local.set $val (i64.add (local.get $val) (i64.const 1)))
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(call $put_u64 (i32.const 0) (i32.const 7) (local.get $val))
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(call $log (i32.const 288) (i32.const 11))
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)
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;; ── get() ─────────────────────────────────────────────────────────────────
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(func (export "get")
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(call $log (i32.const 300) (i32.const 10))
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)
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;; ── reset() ───────────────────────────────────────────────────────────────
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;; Resets counter to 0. Only callable by the deployer (first caller sets ownership).
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(func (export "reset")
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(local $callerLen i32)
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(local $ownerLen i32)
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(local $i i32)
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(local $same i32)
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(local.set $callerLen (call $get_caller (i32.const 32) (i32.const 128)))
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(local.set $ownerLen
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(call $get_state (i32.const 16) (i32.const 5) (i32.const 160) (i32.const 128)))
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;; No owner yet — first caller becomes owner and resets to 0
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(if (i32.eqz (local.get $ownerLen))
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(then
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(call $set_state (i32.const 16) (i32.const 5) (i32.const 32) (local.get $callerLen))
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(call $put_u64 (i32.const 0) (i32.const 7) (i64.const 0))
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(call $log (i32.const 329) (i32.const 8))
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return
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)
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)
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;; Length mismatch → unauthorized
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(if (i32.ne (local.get $callerLen) (local.get $ownerLen))
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(then (call $log (i32.const 316) (i32.const 12)) return)
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)
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;; Byte-by-byte comparison
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(local.set $same (i32.const 1))
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(local.set $i (i32.const 0))
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(block $break
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(loop $loop
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(br_if $break (i32.ge_u (local.get $i) (local.get $callerLen)))
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(if (i32.ne
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(i32.load8_u (i32.add (i32.const 32) (local.get $i)))
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(i32.load8_u (i32.add (i32.const 160) (local.get $i))))
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(then (local.set $same (i32.const 0)) (br $break))
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)
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(local.set $i (i32.add (local.get $i) (i32.const 1)))
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(br $loop)
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)
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)
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(if (i32.eqz (local.get $same))
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(then (call $log (i32.const 316) (i32.const 12)) return)
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)
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;; Authorized — reset
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(call $put_u64 (i32.const 0) (i32.const 7) (i64.const 0))
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(call $log (i32.const 329) (i32.const 8))
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)
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)
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