什么是合约？
Forge 中的合约指定义了某种 Transaction 的数据结构和处理流程，并且被编译部署到链上可供调用的代码集合，Forge 链内置了超过 20 种合约。
如何查看合约？
执行 forge contract:ls 可以列出来所有安装的合约的名称、地址、状态、版本等，如下：
❯ forge contract:ls
ℹ Working on app-chain chain
ℹ Connect to grpc endpoint: tcp://127.0.0.1:28210
┌─────────────────────────┬────────────────────────────────────────┬───────────────┬──────────┐
│ Name │ Address │ Status │ Version │
├─────────────────────────┼────────────────────────────────────────┼───────────────┼──────────┤
│ account_migrate │ z2E3wc5M69FNz4eN3L8KGcKbTUeESMeiTDK8C │ running │ v3 │
│ acquire_asset │ z2E3tU36rsGMbB1Sr2TRWE4WgX8qneMJmG9qX │ running │ v6 │
│ activate_protocol │ z2E49KHCGDgvKteUbBAHB1bgGmLiYZ7hxPVFH │ running │ v1 │
│ approve_withdraw │ z2E3orGQKBJrFdkxWvTf8K8Z6mAxG1tYRaKUA │ running │ v2 │
│ consume_asset │ z2E3pddZJHqtK9hymvjgSgsgLXvD6f3tSWKK9 │ running │ v3 │
│ core │ z2E3zcZAgBLch7fB4P9mmx7Lw9kH3QQ1RKhh3 │ running │ v5 │
│ create_asset │ z2E42KP93Lr896XpAkFjLv3BZW6pCbWWdoyRd │ running │ v6 │
│ deactivate_protocol │ z2E46E1jKAvQLC4qABJpfGNHAtrHbotDhQ44z │ running │ v1 │
│ declare │ z2E3sqY2RFh9CLGx134g1qVn7DcaVc5jeqMj3 │ running │ v3 │
│ delegate │ z2E4AQyu8pUTmRSL7UNCnjZTs7sAvsxacZLYZ │ running │ v1 │
│ deploy_protocol │ z2E3uHN9MGG2chi4ML8pGjomSys2q31Hmzn8H │ running │ v3 │
│ deposit_token │ z2E4ATLe6TeDUk422iRRaRauYjtLmVbSLzh9N │ running │ v5 │
│ exchange │ z2E3rfQZpG5eQPg9dz863g9pNdxrVi7wN7D1B │ running │ v4 │
│ poke │ z2E3pS5UkHQxTeYt5NeqXcs6tngnVfoDFGTLQ │ running │ v6 │
│ retrieve_swap │ z2E3xUwLP5xzHCgS6x4JF9WanK1MxpsFojots │ running │ v1 │
│ revoke_delegate │ z2E3xAfZggwhcuCaVcAA96rtoKzXsQpw2PsWk │ running │ v1 │
│ revoke_swap │ z2E42wimeTd5vF88mUrAoEsCsoMGRWFEAzBAL │ running │ v1 │
│ revoke_withdraw │ z2E482FTjgLRWYzqvpZuCC1etYfggPUj9C1nK │ running │ v3 │
│ setup_swap │ z2E3qAdkcMAMQdgN7K67GCrAVC8e4ANccsyz8 │ running │ v1 │
│ transfer │ z2E437q48tJcTQ8n7NxXDdEWt5odcjjCePSBh │ running │ v3 │
│ update_asset │ z2E49VutnZhgyWupoLjDvobk3FpKiNmUKq6gf │ running │ v3 │
│ upgrade_node │ z2E3ngrkaxJtLr48gDeVt3wEE3SybXAUXmqTK │ running │ v4 │
│ withdraw_token │ z2E3rdKU7wvnpoQ1grVidqt5FBem6LCAKq9ix │ running │ v3 │
└─────────────────────────┴────────────────────────────────────────┴───────────────┴──────────┘