Added docs folder with first draft of the runtime and smart contract API (CityOfZion/neo-storm#31)

* Added docs folder with first draft of the runtime and smart contract API

* Draft of the runtime/neo smart contract api

* Added more API documentation.

* Added the last API documentation for the NEO runtime and interop functions.

Imported from CityOfZion/neo-storm (bc7749ee08f2f48b87f13400e5917ee28e854d86).

docs/runtime.md

@@ -0,0 +1,523 @@
+# Runtime
+A brief overview of NEO smart contract API's that can be used in the neo-storm framework.
+
+# Overview
+1. [Account]()
+2. [Asset]()
+3. [Attribute]()
+4. [Block]()
+5. [Blockchain]()
+6. [Contract]()
+7. [Crypto]()
+8. [Engine]()
+9. [Enumerator]()
+10. [Iterator]()
+11. [Header]()
+12. [Input]()
+13. [Output]()
+14. [Runtime]()
+15. [Storage]()
+16. [Transaction]()
+17. [Util]()
+
+## Account 
+#### GetScriptHash
+```
+GetScriptHash(a Account) []byte
+```
+Returns the script hash of the given account.
+
+#### GetVotes
+```
+GetVotes(a Account) [][]byte
+```
+Returns the the votes (a slice of public keys) of the given account.
+
+#### GetBalance
+```
+GetBalance(a Account, assetID []byte) int
+```
+Returns the balance of the given asset id for the given account.
+
+## Asset
+#### GetAssetID 
+```
+GetAssetID(a Asset) []byte
+```
+Returns the id of the given asset.
+
+#### GetAmount
+```
+GetAmount(a Asset) int 
+```
+Returns the amount of the given asset id.
+
+#### GetAvailable
+```
+GetAvailable(a Asset) int 
+```
+Returns the available amount of the given asset.
+
+#### GetPrecision
+```
+GetPrecision(a Asset) byte
+```
+Returns the precision of the given Asset.
+
+#### GetOwner
+```
+GetOwner(a Asset) []byte
+```
+Returns the owner of the given asset.
+
+#### GetAdmin
+```
+GetAdmin(a Asset) []byte
+```
+Returns the admin of the given asset.
+
+#### GetIssuer
+```
+GetIssuer(a Asset) []byte
+```
+Returns the issuer of the given asset.
+
+#### Create
+```
+Create(type byte, name string, amount int, precision byte, owner, admin, issuer []byte)
+```
+Creates a new asset on the blockchain.
+
+#### Renew
+```
+Renew(asset Asset, years int)
+```
+Renews the given asset as long as the given years.
+
+## Attribute
+#### GetUsage
+```
+GetUsage(attr Attribute) []byte
+```
+Returns the usage of the given attribute.
+
+#### GetData
+```
+GetData(attr Attribute) []byte
+```
+Returns the data of the given attribute.
+
+## Block
+#### GetTransactionCount
+```
+GetTransactionCount(b Block) int
+```
+Returns the number of transactions that are recorded in the given block.
+
+#### GetTransactions
+```
+GetTransactions(b Block) []transaction.Transaction
+```
+Returns a slice of the transactions that are recorded in the given block.
+
+#### GetTransaction
+```
+GetTransaction(b Block, hash []byte) transaction.Transaction
+```
+Returns the transaction by the given hash that is recorded in the given block.
+
+## Blockchain
+#### GetHeight
+```
+GetHeight() int
+```
+Returns the current height of the blockchain.
+
+#### GetHeader
+```
+GetHeader(heightOrHash []interface{}) header.Header
+```
+Return the header by the given hash or index.
+
+#### GetBlock
+```
+GetBlock(heightOrHash interface{}) block.Block
+```
+Returns the block by the given hash or index.
+
+#### GetTransaction
+```
+GetTransaction(hash []byte) transaction.Transaction
+```
+Returns a transaction by the given hash.
+
+#### GetContract
+```
+GetContract(scriptHash []byte) contract.Contract
+```
+Returns the contract found by the given script hash.
+
+#### GetAccount
+```
+GetAccount(scriptHash []byte) account.Account
+```
+Returns the account found by the given script hash.
+
+#### GetValiditors
+```
+GetValidators() [][]byte
+```
+Returns a list of validators public keys.
+
+#### GetAsset
+```
+GetAsset(assetID []byte) asset.Asset
+```
+Returns the asset found by the given asset id.
+
+## Contract
+#### GetScript
+```
+GetScript(c Contract) []byte
+```
+Return the script of the given contract.
+
+#### IsPayable
+```
+IsPayable(c Contract) bool
+```
+Returns whether the given contract is payable.
+
+#### GetStorageContext 
+```
+GetStorageContext(c Contract)
+```
+Returns the storage context of the given contract.
+
+#### Create
+```
+Create(
+    script []byte, 
+    params []interface{}, 
+    returnType byte, 
+    properties interface{}, 
+    name, 
+    version, 
+    author, 
+    email, 
+    description string)
+```
+Creates a new contract on the blockchain.
+
+#### Migrate
+```
+Migrate(
+    script []byte, 
+    params []interface{}, 
+    returnType byte, 
+    properties interface{}, 
+    name, 
+    version, 
+    author, 
+    email, 
+    description string)
+```
+Migrates a contract on the blockchain.
+
+#### Destroy
+```
+Destroy(c Contract) 
+```
+Deletes the given contract from the blockchain.
+
+## Crypto
+#### SHA1
+```
+SHA1(data []byte) []byte
+```
+Computes the sha1 hash of the given bytes
+
+#### SHA256
+```
+SHA256(data []byte) []byte
+```
+Computes the sha256 hash of the given bytes
+
+#### Hash256
+```
+Hash256(data []byte) []byte
+```
+Computes the sha256^2 of the given data.
+
+#### Hash160
+```
+Hash160(data []byte) []byte) []byte
+```
+Computes the ripemd160 over the sha256 hash of the given data.
+
+## Engine
+#### GetScriptContainer
+```
+GetScriptContainer() transaction.Transaction
+```
+Returns the transaction that is in the context of the VM execution.
+
+#### GetExecutingScriptHash
+```
+GetExecutingScriptHash() []byte
+```
+Returns the script hash of the contract that is currently being executed.
+
+#### GetCallingScriptHash
+```
+GetCallingScriptHash() []byte
+```
+Returns the script hash of the contract that has started the execution of the current script.
+
+#### GetEntryScriptHash
+```
+GetEntryScriptHash() []byte
+```
+Returns the script hash of the contract that started the execution from the start. 
+
+## Enumerator
+#### Create
+```
+Create(items []inteface{}) Enumerator
+```
+Create a enumerator from the given items.
+
+#### Next
+```
+Next(e Enumerator) interface{}
+```
+Returns the next item from the given enumerator.
+
+#### Value
+```
+Value(e Enumerator) interface{}
+```
+Returns the enumerator value.
+
+## Iterator
+#### Create
+```
+Create(items []inteface{}) Iterator
+```
+Creates an iterator from the given items.
+
+#### Key
+```
+Key(it Iterator) interface{}
+```
+Return the key from the given iterator.
+
+#### Keys
+```
+Keys(it Iterator) []interface{}
+```
+Returns the iterator's keys 
+
+#### Values
+```
+Values(it Iterator) []interface{}
+```
+Returns the iterator's values 
+
+## Header
+#### GetIndex
+```
+GetIndex(h Header) int
+```
+Returns the height of the given header.
+
+#### GetHash
+```
+GetHash(h Header) []byte
+```
+Returns the hash of the given header.
+
+#### GetPrevHash
+```
+GetPrevhash(h Header) []byte
+```
+Returns the previous hash of the given header.
+
+#### GetTimestamp
+```
+GetTimestamp(h Header) int
+```
+Returns the timestamp of the given header.
+
+#### GetVersion
+```
+GetVersion(h Header) int
+```
+Returns the version of the given header.
+
+#### GetMerkleroot
+```
+GetMerkleRoot(h Header) []byte
+```
+Returns the merkle root of the given header.
+
+#### GetConsensusData
+```
+GetConsensusData(h Header) int
+```
+Returns the consensus data of the given header.
+
+#### GetNextConsensus
+```
+GetNextConsensus(h Header) []byte
+```
+Returns the next consensus of the given header.
+
+## Input
+#### GetHash
+```
+GetHash(in Input) []byte
+```
+Returns the hash field of the given input.
+
+#### GetIndex
+```
+GetIndex(in Input) int
+```
+Returns the index field of the given input.
+
+## Output
+#### GetAssetID
+```
+GetAssetId(out Output) []byte
+```
+Returns the asset id field of the given output.
+
+#### GetValue
+```
+GetValue(out Output) int
+```
+Returns the value field of the given output.
+
+#### GetScriptHash
+```
+GetScriptHash(out Output) []byte
+```
+Returns the script hash field of the given output.
+
+## Runtime
+#### CheckWitness
+```
+CheckWitness(hash []byte) bool 
+```
+Verifies if the given hash is the hash of the contract owner.
+
+#### Log
+```
+Log(message string)
+```
+Logs the given message.
+
+#### Notify
+```
+Notify(args ...interface{}) int
+```
+Notify any number of arguments to the VM.
+
+#### GetTime
+```
+GetTime() int
+```
+Returns the current time based on the highest block in the chain.
+
+#### GetTrigger
+```
+GetTrigger() byte
+```
+Returns the trigger type of the execution.
+
+#### Serialize
+```
+Serialize(item interface{}) []byte
+```
+Serialize the given stack item to a slice of bytes.
+
+#### Deserialize
+```
+Deserialize(data []byte) interface{}
+```
+Deserializes the given data to a stack item.
+
+## Storage
+#### GetContext
+```
+GetContext() Context
+```
+Returns the current storage context.
+
+#### Put
+```
+Put(ctx Context, key, value []interface{}) 
+```
+Stores the given value at the given key.
+
+#### Get
+```
+Get(ctx Context, key interface{}) interface{}
+```
+Returns the value found at the given key.
+
+#### Delete
+```
+Delete(ctx Context, key interface{}) 
+```
+Delete's the given key from storage.
+
+#### Find
+```
+Find(ctx Context, key interface{}) iterator.Iterator
+```
+Find returns an iterator key-values that match the given key.
+
+## Transaction
+#### GetHash
+```
+GetHash(t Transacfion) []byte
+```
+Returns the hash for the given transaction.
+
+#### GetType
+```
+GetType(t Transacfion) byte
+```
+Returns the type of the given transaction.
+
+#### GetAttributes
+```
+GetAttributes(t Transacfion) []attribute.Attribute 
+```
+Returns the attributes of the given transaction.
+
+#### GetReferences
+```
+GetReferences(t Transacfion) interface{} 
+```
+Returns the references of the given transaction.
+
+#### GetUnspentCoins
+```
+GetUnspentCoins(t Transacfion) interface{} 
+```
+Returns the unspent coins of the given transaction.
+
+#### GetOutputs
+```
+GetOutputs(t Transacfion) []output.Output 
+```
+Returns the outputs of the given transaction
+
+#### GetInputs
+```
+GetInputs(t Transacfion) []input.Input 
+```
+Returns the inputs of the given transaction

interop/engine/engine.go

@@ -22,7 +22,7 @@ func GetCallingScriptHash() []byte {
 	return nil
 }
 
-// GetEntryScriptHash returns the script hash of the contract the started the
+// GetEntryScriptHash returns the script hash of the contract that started the
 // execution from the start.
 func GetEntryScriptHash() []byte {
 	return nil