13.1 说明

分析源代码版本：master 2c87fd59（2019.3.7）

回头看 filecoin开发网络使用中创建矿工，提交订单，支付等操作实际上都是actor的新增及状态改变

当前的实现vm还不具备通用abi数据的解释执行能力，未达到真正智能合约水平

13.2 exec(actor及vm的接口定义)

说明
- 提供可执行actor的最小接口要求 ExecutableActor (由actor及具体actor包实现)
- 提供actor键值存取接口定义 Lookup (由actor包实现)
- 提供状态临时存储的接口定义　Storage (由vm.Storage实现)
- actor的执行环境接口定义 VMContext (由vm.context实现)

具体源码注释如下

▼ package
    exec
▶ imports
▼ constants
   + ErrDanglingPointer
   + ErrDecode
   + ErrInsufficientGas
   + ErrStaleHead
▼ variables
   + Errors
▼+Error : string
    [methods]
   + Error() : string
 + ExportedFunc : func(ctx VMContext) []byte, uint8, error
    // actor符号集合
▼+Exports : map[string]*FunctionSignature
    [methods]
    // 判断是否存在特定方法
   + Has(method string) : bool
    // 对于单个函数的符号表
    // todo中的事情：需要转换为非go类型
▼+FunctionSignature : struct
    [fields]
   + Params : []abi.Type
   + Return : []abi.Type
    // 可执行合约接口，这是每一类型的合约必须实现的最小接口
    // 包括account,miner,storagemarket,paymentbroker
▼+ExecutableActor : interface
    [methods]
   + Exports() : Exports
   + InitializeState(storage Storage, initializerData interface{}) : error
   // 由actor.lookup实现键值存储　（actor/storage.go）
▼+Lookup : interface
    [methods]
   + Commit(ctx context.Context) : cid.Cid, error
   + Delete(ctx context.Context, k string) : error
   + Find(ctx context.Context, k string) : interface{}, error
   + IsEmpty() : bool
   + Set(ctx context.Context, k string, v interface{}) : error
   + Values(ctx context.Context) : []*hamt.KV, error
   // 由vm.Storage实现
   // 解决持久化的问题，有副本防止回滚机制
   // 具体实现还有Flush持久化到datastore功能
▼+Storage : interface
    [methods]
    // 提交最新actor　Head
   + Commit(cid.Cid, cid.Cid) : error
    // 如下都为内存中操作
   + Get(cid.Cid) : []byte, error
   + Head() : cid.Cid
   + Put(interface{}) : cid.Cid, error
    // actor的abi执行环境接口,由vm.context实现
▼+VMContext : interface
    [methods]
    // 创建新的合约地址
   + AddressForNewActor() : address.Address, error
    // 查询区块高度
   + BlockHeight() : *types.BlockHeight
    // Gas收费
   + Charge(cost types.GasUnits) : error
    //　创建合约
   + CreateNewActor(addr address.Address, code cid.Cid, initalizationParams interface{}) : error
    // 判断是否为account类型的Actor
   + IsFromAccountActor() : bool
    // 合约中交易信息
   + Message() : *types.Message
    // 执行合约函数
   + Send(to address.Address, method string, value *types.AttoFIL, params []interface{}) : [][]byte, uint8, error
   + Storage() : Storage
    // 当Storage接口完成会删除如下两项
   + ReadStorage() : []byte, error
   + WriteStorage(interface{}) : error

13.3 actor的类型及源码分析

actor包定义及实现了基础actor,此外filecoin还定义了四种内置的actor类型
- 存储市场actor,此类actor整个网络只有一个实例，用于创建存储矿工、更新功率表、获取总存储容量
- Miner actor,此类actor整个网络只有多个实例（随用户数增加而增加），用于执行矿工相关的操作
- paymentbroker actor,此类actor整个网络只有一个实例，用于创建支付通道以及支付相关信息
- account actor,账户actor,此类actor整个网络只有多个实例（随用户数增加而增加），只能用于基本的转账操作

13.3.1　基础actor包

说明

定义了actor的基础结构,其中code如果使用内置的如上四种actor，他们的值都是固定的
提供了actor的基础操作方法

见笔者在代码中的注释

location: actor/actor.go
▼ package
    actor
    // Actor可以理解为合约或者账户，转账操作要检查code cid合法性
▼+Actor : struct
    [fields]
    //余额
   + Balance : *types.AttoFIL
    // 合约代码的cid，vm具体执行其对应的代码
    // 1 具体代码的cid
    // 2 在go语言实现的四种特定合约，这个字段是常量，比如account,miner,storagemarket,paymentbroker
   + Code : cid.Cid
    //　合约状态的最新状态
   + Head : cid.Cid
    // 防止重放攻击而设置的参数
   + Nonce : types.Uint64
    [methods]
    // 计算actor的cid
   + Cid() : cid.Cid, error
    // 打印合约信息
   + Format(f fmt.State, c rune)
    // 增加Nonce+1方法
   + IncNonce()
    // 编码
   + Marshal() : []byte, error
    // 解码
   + Unmarshal(b []byte) : error
    [functions]
   + NewActor(code cid.Cid, balance *types.AttoFIL) : *Actor
▼ functions
    // 只有account类型的actor使用
   + NextNonce(actor *Actor) : uint64, error
   - init()

location: actor/export.go
▼ functions
    // 返回某个actor的方法执行函数
   + MakeTypedExport(actor exec.ExecutableActor, method string) : exec.ExportedFunc
   //　序列化成字节切片
   + MarshalValue(val interface{}) : []byte, error

13.3.2 storagemarket actor

主要功能

创建存储矿工
获取总存储量

更新功率

▼ package
    storagemarket
▶ imports
▼ constants
   + ErrInsufficientCollateral
   + ErrPledgeTooLow
   + ErrUnknownMiner
▼ variables
   + Errors
   + MinimumCollateralPerSector
   + MinimumPledge
   - storageMarketExports
▼+Actor : struct
    [methods]
    // 创建存储矿工
    // 会调用到miner actor的创建
   + CreateMiner(vmctx exec.VMContext, pledge *big.Int, publicKey []byte, pid peer.ID) : address.Address, uint8, error
   + Exports() : exec.Exports
    // 获取总存储
   + GetTotalStorage(vmctx exec.VMContext) : *big.Int, uint8, error
   + InitializeState(storage exec.Storage, _ interface{}) : error
    // 更新功率
   + UpdatePower(vmctx exec.VMContext, delta *big.Int) : uint8, error
▼+State : struct
    [fields]
    // miners合集的cid
   + Miners : cid.Cid
   + TotalCommittedStorage : *big.Int
▼ functions
   + MinimumCollateral(sectors *big.Int) : *types.AttoFIL
    // 实例化存储市场
   + NewActor() : *actor.Actor, error
   - init()

13.3.3 miner actor

提供功能

有基本转账功能
提供如下功能

filecoin网络中存在多个Miner Actor

▼ package
    miner
▶ imports
▼ constants
   + ErrAskNotFound
   + ErrCallerUnauthorized
   + ErrInsufficientPledge
   + ErrInvalidPoSt
   + ErrInvalidSealProof
   + ErrInvalidSector
   + ErrPublicKeyTooBig
   + ErrSectorCommitted
   + ErrStoragemarketCallFailed
   + MaximumPublicKeySize
▼ variables
   + Errors
   + GracePeriodBlocks
   + ProvingPeriodBlocks
   - minerExports
▼+Actor : struct
    [fields]
   + Bootstrap : bool
    [methods]
    // 增加订单
   + AddAsk(ctx exec.VMContext, price *types.AttoFIL, expiry *big.Int) : *big.Int, uint8, error
    // 抵押承诺
   + CommitSector(ctx exec.VMContext, sectorID uint64, commD, commR, commRStar, proof []byte) : uint8, error
   + Exports() : exec.Exports
    // 获取存储矿工相关信息
   + GetAsk(ctx exec.VMContext, askid *big.Int) : []byte, uint8, error
   + GetAsks(ctx exec.VMContext) : []uint64, uint8, error
   + GetKey(ctx exec.VMContext) : []byte, uint8, error
   + GetLastUsedSectorID(ctx exec.VMContext) : uint64, uint8, error
   + GetOwner(ctx exec.VMContext) : address.Address, uint8, error
   + GetPeerID(ctx exec.VMContext) : peer.ID, uint8, error
   + GetPledge(ctx exec.VMContext) : *big.Int, uint8, error
   + GetPower(ctx exec.VMContext) : *big.Int, uint8, error
   + GetProvingPeriodStart(ctx exec.VMContext) : *types.BlockHeight, uint8, error
   + GetSectorCommitments(ctx exec.VMContext) : map[string]types.Commitments, uint8, error
   + InitializeState(storage exec.Storage, initializerData interface{}) : error
    // 提交时空证明
   + SubmitPoSt(ctx exec.VMContext, postProofs []proofs.PoStProof) : uint8, error
    // 更新节点Id
   + UpdatePeerID(ctx exec.VMContext, pid peer.ID) : uint8, error
    // 报价单：价格，时长，序号
▼+Ask : struct
    [fields]
   + Expiry : *types.BlockHeight
   + ID : *big.Int
   + Price : *types.AttoFIL
    // 矿工Actor状态
▼+State : struct
    [fields]
   + Asks : []*Ask
   + Collateral : *types.AttoFIL
   + LastPoSt : *types.BlockHeight
   + LastUsedSectorID : uint64
   + NextAskID : *big.Int
   + Owner : address.Address
   + PeerID : peer.ID
   + PledgeSectors : *big.Int
   + Power : *big.Int
   + ProvingPeriodStart : *types.BlockHeight
   + PublicKey : []byte
   + SectorCommitments : map[string]types.Commitments
    [functions]
   + NewState(owner address.Address, key []byte, pledge *big.Int, pid peer.ID, collateral *types.AttoFIL) : *State
▼ functions
   + NewActor() : *actor.Actor
   - init()

13.3.4 paymentbroker actor

说明
- 全网只有一个paymentbroker
- 几个概念的关系简图

源码分析注释

▼ package
    paymentbroker
▼+Actor : struct
    [methods]
    // 关闭支付通道
   + Close(vmctx exec.VMContext, payer address.Address, chid *types.ChannelID, amt *types.AttoFIL, validAt *types.BlockHeight, sig []byte) : uint8, error
    // 创建支付通道
   + CreateChannel(vmctx exec.VMContext, target address.Address, eol *types.BlockHeight) : *types.ChannelID, uint8, error
   + Exports() : exec.Exports
    // 增加资金
   + Extend(vmctx exec.VMContext, chid *types.ChannelID, eol *types.BlockHeight) : uint8, error
   + InitializeState(storage exec.Storage, initializerData interface{}) : error
    // 查询某个支付者的信息
   + Ls(vmctx exec.VMContext, payer address.Address) : []byte, uint8, error
    // 撤回资金
   + Reclaim(vmctx exec.VMContext, chid *types.ChannelID) : uint8, error
    // 赎回(或者收款)资金
   + Redeem(vmctx exec.VMContext, payer address.Address, chid *types.ChannelID, amt *types.AttoFIL, validAt *types.BlockHeight, sig []byte) : uint8, error
    // 收据，指明在特定区块高度之前都是有效的
   + Voucher(vmctx exec.VMContext, chid *types.ChannelID, amount *types.AttoFIL, validAt *types.BlockHeight) : []byte, uint8, error
▼+PaymentChannel : struct
    [fields]
    // 支付通道内金额
   + Amount : *types.AttoFIL
    // 已被赎回金额
   + AmountRedeemed : *types.AttoFIL
   + Eol : *types.BlockHeight
    // 收款人地址
   + Target : address.Address
▼ functions
    // 收据的签名及校验
   + SignVoucher(channelID *types.ChannelID, amount *types.AttoFIL, validAt *types.BlockHeight, addr address.Address, signer types.Signer) : types.Signature, error
   + VerifyVoucherSignature(payer address.Address, chid *types.ChannelID, amt *types.AttoFIL, validAt *types.BlockHeight, sig []byte) : bool
   - createVoucherSignatureData(channelID *types.ChannelID, amount *types.AttoFIL, validAt *types.BlockHeight) : []byte
   - findByChannelLookup(ctx context.Context, storage exec.Storage, byPayer exec.Lookup, payer address.Address) : exec.Lookup, error
   - init()
   - reclaim(ctx context.Context, vmctx exec.VMContext, byChannelID exec.Lookup, payer address.Address, chid *types.ChannelID, channel *PaymentChannel) : error
   - updateChannel(ctx exec.VMContext, target address.Address, channel *PaymentChannel, amt *types.AttoFIL, validAt *types.BlockHeight) : error
   - withPayerChannels(ctx context.Context, storage exec.Storage, payer address.Address, f func(exec.Lookup) error) : error
   - withPayerChannelsForReading(ctx context.Context, storage exec.Storage, payer address.Address, f func(exec.Lookup) error) : error

13.3.5 account actor

说明
- 纯账户，记录nonce
- 只有转帐功能
- filecoin网络中存在多个account Actor

▼ package
    account
▶ imports
▼ variables
   -accountExports
▼+Actor : struct
    [methods]
   +Exports() : exec.Exports
   +InitializeState(_ exec.Storage, _ interface{}) : error
▼ functions
    // 实例化account actor 集成actor包中Actor所实现的所有方法
   +NewActor(balance *types.AttoFIL) : *actor.Actor, error
    // 将其他actor类型转为account，保留余额
   +UpgradeActor(act *actor.Actor) : error

13.4 vm(虚拟机运行环境)

虚拟机执行函数

▼ package
    vm
▶ imports
▼-sendDeps : struct
    [fields]
   - transfer : func(*actor.Actor, *actor.Actor, *types.AttoFIL) error
▼ functions
    // 执行合约
   + Send(ctx context.Context, vmCtx *Context) : [][]byte, uint8, error
    // 转账
   + Transfer(fromActor, toActor *actor.Actor, value *types.AttoFIL) : error
   - send(ctx context.Context, deps sendDeps, vmCtx *Context) : [][]byte, uint8, error

vm环境实现

▼+Context : struct
    [fields]
   - ancestors : []types.TipSet
   - blockHeight : *types.BlockHeight
   - deps : *deps
   - from : *actor.Actor
   - gasTracker : *GasTracker
   - lookBack : int
   - message : *types.Message
   - state : *state.CachedTree
   - storageMap : StorageMap
   - to : *actor.Actor
    [methods]
    // 实现上述VMContext 接口，注释见上
   + AddressForNewActor() : address.Address, error
   + BlockHeight() : *types.BlockHeight
   + Charge(cost types.GasUnits) : error
   + CreateNewActor(addr address.Address, code cid.Cid, initializerData interface{}) : error
   + GasUnits() : types.GasUnits
   + IsFromAccountActor() : bool
   + Message() : *types.Message
   + Rand(sampleHeight *types.BlockHeight) : []byte, error
   + ReadStorage() : []byte, error
   + Send(to address.Address, method string, value *types.AttoFIL, params []interface{}) : [][]byte, uint8, error
   + Storage() : exec.Storage
   + WriteStorage(memory interface{}) : error
    [functions]
   + NewVMContext(params NewContextParams) : *Context
▼+NewContextParams : struct
    [fields]
   + Ancestors : []types.TipSet
   + BlockHeight : *types.BlockHeight
   + From : *actor.Actor
   + GasTracker : *GasTracker
   + LookBack : int
   + Message : *types.Message
   + State : *state.CachedTree
   + StorageMap : StorageMap
   + To : *actor.Actor
▼-deps : struct
    [fields]
   + EncodeValues : func([]*abi.Value) []byte, error
   + GetOrCreateActor : func(context.Context, address.Address, func() *actor.Actor, error) *actor.Actor, error
   + Send : func(context.Context, *Context) [][]byte, uint8, error
   + ToValues : func([]interface{}) []*abi.Value, error
▼ deps* : ctype
    [functions]
   - makeDeps(st *state.CachedTree) : *deps
▼ functions
   - computeActorAddress(creator address.Address, nonce uint64) : address.Address, error

合约状态存储

▼+Storage : struct
    [fields]
   - actor : *actor.Actor
   - blockstore : blockstore.Blockstore
   - chunks : map[cid.Cid]ipld.Node
    [methods]
   + Commit(newCid cid.Cid, oldCid cid.Cid) : error
   + Flush() : error
   + Get(cid cid.Cid) : []byte, error
   + Head() : cid.Cid
   + Prune() : error
   + Put(v interface{}) : cid.Cid, error
   - liveDescendantIds(id cid.Cid) : *cid.Set, error
    [functions]
   + NewStorage(bs blockstore.Blockstore, act *actor.Actor) : Storage
▼-storageMap : struct
    [fields]
   - blockstore : blockstore.Blockstore
   - storageMap : map[address.Address]Storage
    [methods]
   + Flush() : error
   + NewStorage(addr address.Address, actor *actor.Actor) : Storage
▼+StorageMap : interface
    [methods]
   + Flush() : error
   + NewStorage(addr address.Address, actor *actor.Actor) : Storage
▼ functions
   + NewStorageMap(bs blockstore.Blockstore) : StorageMap

13.5 state包(actor状态)

表征actor的状态

filecoin源码分析之服务层actor及vm

13.1 说明

13.2 exec(actor及vm的接口定义)

13.3 actor的类型及源码分析

13.3.1 基础actor包

13.3.2 storagemarket actor

13.3.3 miner actor

13.3.4 paymentbroker actor

13.3.5 account actor

13.4 vm(虚拟机运行环境)

13.5 state包(actor状态)

13.3.1　基础actor包