scdo-eth-rpc-proxy

Archived proof of concept, not used in production. It was never deployed. eth_call is not implemented, eth_gasPrice / eth_estimateGas / eth_getCode return fixed values, and it needs a patched go-scdo node that does not exist. Chain ID 5680 belongs to SCDO shard 0, which is a native EVM chain and needs no proxy: use https://scdoscan.io/rpc/0 (see SCDOLAB/scdo-shard0). Do not add this proxy to MetaMask with chain ID 5680.

已归档的概念验证，生产未使用。 功能不完整。chainId 5680 是 shard0 的，shard0 直接用 https://scdoscan.io/rpc/0 即可。

把以太坊 eth_* JSON-RPC 调用翻译成 SCDO 原生 scdo_* 调用的轻量代理。 对外呈现单一逻辑链，对内按分片路由到 4 个 SCDO 节点。 目标：让 MetaMask / Hardhat / Foundry 无需改造即可接入 SCDO。

架构

MetaMask / Hardhat / Blockscout
    │  eth_* (JSON-RPC 2.0, EVM format)
    ▼
┌─────────────────────────────────┐
│  scdo-eth-rpc-proxy (:8038)     │
│  rpc mux → addr shard router    │
└──────┬──────┬──────┬──────┬────┘
       ▼      ▼      ▼      ▼
    shard1 shard2 shard3 shard4
    scdo_* scdo_* scdo_* scdo_*

部署

export SCDO_CHAIN_ID=0x1630                 # 5680
export SCDO_ETH_LISTEN=:8038
export SCDO_DEFAULT_SHARD=1
export SCDO_PIN_SHARD=1                     # PoC: pin all traffic to shard1
export SCDO_SHARD1_RPC=http://node1:8037
export SCDO_SHARD2_RPC=http://node2:8037
export SCDO_SHARD3_RPC=http://node3:8037
export SCDO_SHARD4_RPC=http://node4:8037

go build -o scdo-eth-rpc-proxy .
./scdo-eth-rpc-proxy

MetaMask → Add Network:

• Network Name: SCDO Mainnet
• RPC URL: http://<host>:8038
• Chain ID: 5680
• Currency Symbol: SCDO
• Important: Settings → Advanced → disable "EIP-1559" (use legacy gas)

接口映射

eth_* 方法	后端 scdo_*	状态
web3_clientVersion	—	✅ fixed string
net_version	—	✅ chainID decimal
eth_chainId	—	✅ 0x1630
eth_syncing	—	✅ false
eth_accounts	—	✅ []
eth_blockNumber	scdo_getBlockCount	✅
eth_getBalance	scdo_getBalance	✅
eth_getTransactionCount	scdo_getAccountNonce	✅
eth_sendRawTransaction	scdo_sendRawTransaction	✅ byte-passthrough
eth_gasPrice	—	⚠️ stub 1 Gwei
eth_estimateGas	—	⚠️ stub 21000
eth_getCode	—	⚠️ stub 0x
eth_call	—	❌ not implemented

关键设计

• 不重签交易：收到 MetaMask 签好的 raw tx 后，解 RLP 找 to 地址路由分片，原始字节原样转发。
• 地址透传：MetaMask 的 keccak 地址 = 链上地址，节点 patch 后接受任意 0x+40hex。
• 零外部依赖：纯 Go 标准库，go build 直接出二进制。