NewChain returns new chain instance.
(filename string)
| 38 | |
| 39 | // NewChain returns new chain instance. |
| 40 | func NewChain(filename string) (c *Chain, err error) { |
| 41 | var ( |
| 42 | strg xi.Storage |
| 43 | priv *ca.PrivateKey |
| 44 | ) |
| 45 | // generate empty nodeId |
| 46 | nodeID := proto.NodeID("0000000000000000000000000000000000000000000000000000000000000000") |
| 47 | |
| 48 | // TODO(leventeliu): add multiple storage engine support. |
| 49 | if strg, err = xs.NewSqlite(filename); err != nil { |
| 50 | return |
| 51 | } |
| 52 | if priv, err = kms.GetLocalPrivateKey(); err != nil { |
| 53 | return |
| 54 | } |
| 55 | c = &Chain{ |
| 56 | state: NewState(sql.LevelReadUncommitted, nodeID, strg), |
| 57 | priv: priv, |
| 58 | } |
| 59 | return |
| 60 | } |
| 61 | |
| 62 | // Query queries req from local chain state and returns the query results in resp. |
| 63 | func (c *Chain) Query(req *types.Request) (resp *types.Response, err error) { |