diff options
| -rw-r--r-- | common/README.md | 37 |
1 files changed, 19 insertions, 18 deletions
diff --git a/common/README.md b/common/README.md index 1ed56b71b..adea022b7 100644 --- a/common/README.md +++ b/common/README.md @@ -1,49 +1,50 @@ -# ethutil +# common [](https://travis-ci.org/ethereum/go-ethereum) -The ethutil package contains the ethereum utility library. +The common package contains the ethereum utility library. # Installation -`go get github.com/ethereum/ethutil-go` +As a subdirectory the main go-ethereum repository, you get it with +`go get github.com/ethereum/go-ethereum`. # Usage ## RLP (Recursive Linear Prefix) Encoding -RLP Encoding is an encoding scheme utilized by the Ethereum project. It -encodes any native value or list to string. +RLP Encoding is an encoding scheme used by the Ethereum project. It +encodes any native value or list to a string. -More in depth information about the Encoding scheme see the [Wiki](http://wiki.ethereum.org/index.php/RLP) -article. +More in depth information about the encoding scheme see the +[Wiki](http://wiki.ethereum.org/index.php/RLP) article. ```go -rlp := ethutil.Encode("doge") +rlp := common.Encode("doge") fmt.Printf("%q\n", rlp) // => "\0x83dog" -rlp = ethutil.Encode([]interface{}{"dog", "cat"}) +rlp = common.Encode([]interface{}{"dog", "cat"}) fmt.Printf("%q\n", rlp) // => "\0xc8\0x83dog\0x83cat" -decoded := ethutil.Decode(rlp) +decoded := common.Decode(rlp) fmt.Println(decoded) // => ["dog" "cat"] ``` ## Patricia Trie -Patricie Tree is a merkle trie utilized by the Ethereum project. +Patricie Tree is a merkle trie used by the Ethereum project. More in depth information about the (modified) Patricia Trie can be found on the [Wiki](http://wiki.ethereum.org/index.php/Patricia_Tree). The patricia trie uses a db as backend and could be anything as long as -it satisfies the Database interface found in `ethutil/db.go`. +it satisfies the Database interface found in `common/db.go`. ```go db := NewDatabase() // db, root -trie := ethutil.NewTrie(db, "") +trie := common.NewTrie(db, "") trie.Put("puppy", "dog") trie.Put("horse", "stallion") @@ -65,7 +66,7 @@ all (key, value) bindings. // ... Create db/trie // Note that RLP uses interface slices as list -value := ethutil.Encode([]interface{}{"one", 2, "three", []interface{}{42}}) +value := common.Encode([]interface{}{"one", 2, "three", []interface{}{42}}) // Store the RLP encoded value of the list trie.Put("mykey", value) ``` @@ -89,7 +90,7 @@ type (e.g. `Slice()` returns []interface{}, `Uint()` return 0, etc). `Append(v)` appends the value (v) to the current value/list. ```go -val := ethutil.NewEmptyValue().Append(1).Append("2") +val := common.NewEmptyValue().Append(1).Append("2") val.AppendList().Append(3) ``` @@ -110,7 +111,7 @@ val.AppendList().Append(3) `Byte()` returns the value as a single byte. ```go -val := ethutil.NewValue([]interface{}{1,"2",[]interface{}{3}}) +val := common.NewValue([]interface{}{1,"2",[]interface{}{3}}) val.Get(0).Uint() // => 1 val.Get(1).Str() // => "2" s := val.Get(2) // => Value([]interface{}{3}) @@ -122,7 +123,7 @@ s.Get(0).Uint() // => 3 Decoding streams of RLP data is simplified ```go -val := ethutil.NewValueFromBytes(rlpData) +val := common.NewValueFromBytes(rlpData) val.Get(0).Uint() ``` @@ -132,7 +133,7 @@ Encoding from Value to RLP is done with the `Encode` method. The underlying value can be anything RLP can encode (int, str, lists, bytes) ```go -val := ethutil.NewValue([]interface{}{1,"2",[]interface{}{3}}) +val := common.NewValue([]interface{}{1,"2",[]interface{}{3}}) rlp := val.Encode() // Store the rlp data Store(rlp) |