chain-sdk

EV-node Cosmos Chain Hub

EV-node là nền tảng để chạy chain Cosmos + WASM trên DA layer (Celestia) theo mô hình sequencer + fullnode.

Version note: Không dùng tag/release trước v1.* cho môi trường production.

1) Tài liệu chính

• Runbook Cosmos + WASM: cosmos.md
• Go SDK cho dApp chain + WASM tx/query: apps/cosmos-exec/sdk/cosmoswasm/README.md
• CLI SDK (dal-sdk): apps/cosmos-exec/cmd/dal-sdk/README.md
• Runner full stack: scripts/run-cosmos-wasm-nodes.go
• Contract helper scripts:
  • scripts/contracts/wasm-contract.sh
  • scripts/contracts/wasm-rpc.sh
• Chain SDK Go modules: github.com/DataAvailabilityLayerNovel/chain-sdk

2) Kiến trúc chain Cosmos trong repo

• apps/cosmos-wasm: node binary evcosmos
• apps/cosmos-exec: execution backend cosmos-exec-grpc
• scripts/run-cosmos-wasm-nodes.go: orchestration sequencer + fullnode + exec services
• DA submit: đi trực tiếp qua runtime evnode (aggregator), không cần sidecar cosmos-da-submit

Luồng tổng quát:

1. evcosmos-sequencer produce block
2. cosmos-exec-grpc execute tx / cập nhật state
3. Sequencer submit header/data lên DA
4. evcosmos-fullnode sync qua P2P + DA fallback

3) Quickstart chạy chain (CLI)

Tại root repo:

set -a && source .env && set +a
go run -tags run_cosmos_wasm ./scripts/run-cosmos-wasm-nodes.go --clean-on-start=true

Health check:

curl -sS http://127.0.0.1:38331/health/live
curl -sS http://127.0.0.1:48331/health/live

Dọn process nếu kẹt port:

pkill -f cosmos-exec-grpc || true
pkill -f evcosmos || true
pkill -f run-cosmos-wasm-nodes.go || true

Chi tiết đầy đủ: cosmos.md

4) Quickstart chạy chain bằng SDK

SDK package:

github.com/evstack/ev-node/apps/cosmos-exec/sdk/cosmoswasm

Ví dụ runnable:

• Start chain: apps/cosmos-exec/sdk/cosmoswasm/examples/dapp-chain/main.go
• Start chain + deploy contract: apps/cosmos-exec/sdk/cosmoswasm/examples/dapp-chain-deploy/main.go

Chạy nhanh:

cd apps/cosmos-exec

export EVNODE_PROJECT_ROOT=/absolute/path/to/ev-node
export CHAIN_NAME=my-dapp-chain
export DA_NAMESPACE=my-dapp-namespace
export DA_BRIDGE_RPC=https://<celestia-bridge-rpc>
export DA_AUTH_TOKEN=<token>

go run ./sdk/cosmoswasm/examples/dapp-chain

4a) Quickstart CLI SDK (dal-sdk)

dal-sdk là CLI tool để manage dApp chain, submit tx, deploy/query contract, và thao tác native bank operations không cần viết Go code.

Build

cd apps/cosmos-exec
go build -o dal-sdk ./cmd/dal-sdk

Gọi lệnh

# Start chain
./dal-sdk chain start --name mycosmos --namespace rollup --da-rpc http://127.0.0.1:26758

# Deploy CW20 contract
./dal-sdk contract deploy-cw20 \
  --wasm ./cw20_base.wasm \
  --name Token \
  --symbol TOK \
  --supply 1000000

# Send native tokens
./dal-sdk bank send --to cosmos1... --amount 1000stake

# Execute contract
./dal-sdk contract execute --contract cosmos1... --msg '{"increment":{}}'

# Query tx result
./dal-sdk tx result --hash <tx_hash>

Các command groups:

• chain — Start/manage dApp chain
• tx — Submit & track transactions
• contract — WASM contract operations (store, instantiate, execute, query, deploy, balance, transfer)
• bank — Native coin operations (send, balance check)

Xem chi tiết: apps/cosmos-exec/cmd/dal-sdk/README.md

5) Lệnh thường dùng cho Cosmos chain (Scripts)

• RPC state/block/tx:
  • ./scripts/contracts/wasm-rpc.sh status
  • ./scripts/contracts/wasm-rpc.sh latest-block
  • ./scripts/contracts/wasm-rpc.sh tx --hash <HEX_TX_HASH>
• Contract flow:
  • ./scripts/contracts/wasm-contract.sh deploy
  • ./scripts/contracts/wasm-contract.sh execute --contract <ADDR> --msg '<JSON>'
  • ./scripts/contracts/wasm-contract.sh query --contract <ADDR> --msg '<JSON>'
• DA blob query/watch:
  • ./scripts/query_celestia_blob.sh
  • ./scripts/query_celestia_blob_range.sh --from-height <N> --to-height <M>
  • ./scripts/watch_celestia_latest_blobs.sh --show-errors

6) Biến môi trường & địa chỉ endpoint

Biến DA (Data Availability)

• DA_BRIDGE_RPC hoặc DA_RPC — Celestia bridge RPC endpoint
• DA_AUTH_TOKEN — Authentication token cho DA layer
• DA_NAMESPACE — Namespace cho DA submit/query

Biến Chain

• CHAIN_NAME — Tên dApp chain (SDK/examples)
• EVNODE_PROJECT_ROOT — Địa chỉ root folder ev-node (SDK/examples)

Endpoint mặc định

• Exec API (gRPC): http://127.0.0.1:50051 — Dùng cho tx submit, contract operations
• Cosmos REST: http://127.0.0.1:38331 — Dùng cho bank balance query
• Cosmos RPC: http://127.0.0.1:38657 — State/block/tx queries

Lưu ý: Tránh set sai DA_NAMESPACE_B64 thủ công. Namespace query/submit nên đồng bộ từ DA_NAMESPACE.

7) Go SDK Package

Dành cho dApp developers integrate với chain theo lập trình:

cd apps/cosmos-exec
go test ./sdk/cosmoswasm/...

Go module: github.com/evstack/ev-node/apps/cosmos-exec/sdk/cosmoswasm

API reference: apps/cosmos-exec/sdk/cosmoswasm/README.md

8) Contributing

• Hướng dẫn đóng góp: CONTRIBUTING.md
• Bộ docs tổng quan: docs/README.md
• Chain SDK repo: github.com/DataAvailabilityLayerNovel/chain-sdk
• Website Evolve: ev.xyz