diff --git a/.gitignore b/.gitignore index 4e905e7..b1fc9d9 100644 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,4 @@ *.avm +*.nef +config.json /vendor/ diff --git a/Makefile b/Makefile index 17946ba..d60ae64 100644 --- a/Makefile +++ b/Makefile @@ -4,7 +4,7 @@ NEOGO?=neo-go .PHONY: build tests build: - $(NEOGO) contract compile -i neofs_contract.go + $(NEOGO) contract compile -i neofs_contract.go -c neofs_config.yml -m config.json tests: go mod vendor diff --git a/README.md b/README.md index 859698e..c3f7ac5 100644 --- a/README.md +++ b/README.md @@ -1,43 +1,31 @@ # NeoFS smart-contract -This smart-contract controls list of NeoFS Inner Ring nodes and provides -methods to deposit and withdraw assets. These assets are used as a payment and -a reward for data storage. - +This smart-contract controls list of NeoFS Inner Ring nodes, user assets in +NeoFS balance contract and stores NeoFS runtime configuration. ## Getting Started This repository contains: -- NeoFS smart-contract written in Go -- Unit tests for the smart-contract +- NeoFS smart-contract in Go ### Prerequisites To compile smart-contract you need: -- [neo-go](https://github.com/nspcc-dev/neo-go) >= 0.74.0 - - -To run tests you need: - -- [go](https://golang.org/dl/) >= 1.12 +- [neo-go](https://github.com/nspcc-dev/neo-go) >= 0.90.0 ## Compiling To compile smart contract run `make build` command. Compiled contract -`neofs_contract.avm` will be placed in the same directory. +`neofs_contract.nef` and manifest `config.json` will be placed in the same +directory. ``` -$ make build -neo-go contract compile -i neofs_contract.go -02a600c56b6a007bc46a517bc468164e656f2e52756e74696d652e476574547269676765726165880d9e640700006c756668164e656f2e53746f726167652e476574436f6e74657874616a527bc46a00c376064465706c6f798764c7016a52c30d496e6e657252696e674c6973747c657c0d6a537bc46a5 -3c3c000a0642f0019636f6e747261637420616c7265616479206465706c6f796564680f4e656f2e52756e74696d652e4c6f67f06a51c3c06a547bc46a54c35297009e6448003270726f76696465207061697273206f6620696e6e65722072696e67206164647265737320616e64207075626c6963206b65 -... -c46a00c36a59c37c6592fd6476006a52c36a5ac36a59c3ad6469006a58c38b6a587bc4006a5b7bc46a5bc36a57c3c09f6444006a57c36a5bc3c36a59c387642b00156475706c6963617465207075626c6963206b657973680f4e656f2e52756e74696d652e4c6f67f06a5bc38b6a5b7bc462b7ff6a57c36 -a59c3787cc86a577bc46a53c30161936a537bc46234ff6a58c36a56c3a2640700516c75661e6e6f7420656e6f756768207665726966696564207369676e617475726573680f4e656f2e52756e74696d652e4c6f6761006c7566 -$ ls neofs_contract.avm -neofs_contract.avm +$ make build +neo-go contract compile -i neofs_contract.go -c neofs_config.yml -m config.json +$ ls neofs_contract.nef config.json +config.json neofs_contract.nef ``` You can specify path to the `neo-go` binary with `NEOGO` environment variable: @@ -46,57 +34,6 @@ You can specify path to the `neo-go` binary with `NEOGO` environment variable: $ NEOGO=/home/user/neo-go/bin/neo-go make build ``` -## Running the tests - -`neofs_contract_test.go` file contains tests for most of the provided methods. -It compiles smart-contract and uses instance of the NeoVM to run -code. - -To test smart contract run `make tests` command. - -``` -$ make tests -go mod vendor -go test -mod=vendor -v -race github.com/nspcc-dev/neofs-contract -=== RUN TestContract - TestContract: neofs_contract_test.go:360: provide pairs of inner ring address and public key - TestContract: neofs_contract_test.go:360: contract already deployed -=== RUN TestContract/InnerRingAddress - TestContract: neofs_contract_test.go:360: target element has been removed -=== RUN TestContract/Deposit - TestContract: neofs_contract_test.go:360: funds have been transfered -=== RUN TestContract/Withdraw -=== RUN TestContract/Withdraw/Double_Withdraw - TestContract: neofs_contract_test.go:360: verification check has already been used -=== RUN TestContract/InnerRingCandidateAdd -=== RUN TestContract/InnerRingCandidateAdd/Double_InnerRingCandidateAdd - TestContract: neofs_contract_test.go:360: is already in list -=== RUN TestContract/InnerRingCandidateRemove -=== RUN TestContract/InnerRingCandidateRemove/Remove_unknown_candidate - TestContract: neofs_contract_test.go:360: target element has not been removed - TestContract: neofs_contract_test.go:360: target element has not been removed -=== RUN TestContract/InnerRingUpdate - TestContract/InnerRingUpdate: neofs_contract_test.go:174: implement getIRExcludeCheque without neofs-node dependency ---- PASS: TestContract (0.43s) - --- PASS: TestContract/InnerRingAddress (0.00s) - --- PASS: TestContract/Deposit (0.00s) - --- PASS: TestContract/Withdraw (0.01s) - --- PASS: TestContract/Withdraw/Double_Withdraw (0.00s) - --- PASS: TestContract/InnerRingCandidateAdd (0.00s) - --- PASS: TestContract/InnerRingCandidateAdd/Double_InnerRingCandidateAdd (0.00s) - --- PASS: TestContract/InnerRingCandidateRemove (0.00s) - --- PASS: TestContract/InnerRingCandidateRemove/Remove_unknown_candidate (0.00s) - --- SKIP: TestContract/InnerRingUpdate (0.00s) -PASS -ok github.com/nspcc-dev/neofs-contract 0.453s -``` - -### Skipped tests - -Some tests might be skipped for now. These tests used `neofs-node` -structures, that are not publicly available yet, e.g. cheque for -`InnerRingUpdate` call. - ## License This project is licensed under the GPLv3 License - see the diff --git a/go.mod b/go.mod index d0e2ed3..f19f3f6 100644 --- a/go.mod +++ b/go.mod @@ -3,9 +3,12 @@ module github.com/nspcc-dev/neofs-contract go 1.12 require ( - github.com/multiformats/go-multiaddr v0.2.1 - github.com/nspcc-dev/neo-go v0.74.0 - github.com/nspcc-dev/neofs-api-go v0.5.0 + github.com/mr-tron/base58 v1.1.3 // indirect + github.com/nspcc-dev/neo-go v0.90.0 github.com/nspcc-dev/neofs-crypto v0.3.0 + github.com/pkg/errors v0.9.1 // indirect github.com/stretchr/testify v1.5.1 + golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect + golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135 // indirect + gopkg.in/yaml.v2 v2.2.5 // indirect ) diff --git a/go.sum b/go.sum index 40ff7c6..7a325db 100644 --- a/go.sum +++ b/go.sum @@ -1,10 +1,14 @@ -cloud.google.com/go 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v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= -honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/neofs_config.yml b/neofs_config.yml index 84f5d00..7c0479d 100644 --- a/neofs_config.yml +++ b/neofs_config.yml @@ -1,12 +1,2 @@ ---- - -project: - author: Neo SPCC - email: ops@nspcc.ru - version: 0.99 - name: Neofs Smart Contract - hasstorage: true - hasdynamicinvocation: true - ispayable: true - returntype: ByteArray - parameters: ['String', 'Array'] +hasstorage: true +ispayable: false diff --git a/neofs_contract.go b/neofs_contract.go index bab6b25..d252121 100644 --- a/neofs_contract.go +++ b/neofs_contract.go @@ -1,29 +1,97 @@ package smart_contract +/* + NeoFS Smart Contract for NEO3.0. + + Utility operations, executed once in deploy stage: + - Init(pubKey, ... ) - setup initial inner ring nodes + - InitConfig(key, value, key, value...) - setup initial NeoFS configuration + + User operations: + - Deposit(script-hash, amount, script-hash(?)) - deposit gas assets to this script-hash address to NeoFS balance + - Withdraw(script-hash, amount) - initialize gas asset withdraw from NeoFS balance + - Bind(script-hash, pubKeys...) - bind public key with user's account to use it in NeoFS requests + - Unbind(script-hash, pubKeys...) - unbind public key from user's account + + Inner ring list operations: + - InnerRingList() - returns array of inner ring node keys + - InnerRingCandidates() - returns array of inner ring candidate node keys + - IsInnerRing(pubKey) - returns 'true' if key is inside of inner ring list + - InnerRingCandidateAdd(pubKey) - adds key to the list of inner ring candidates + - InnerRingCandidateRemove(pubKey) - removes key from the list of inner ring candidates + - InnerRingUpdate(id, pubKeys...) - updates list of inner ring nodes with provided list of public keys + + Config operations: + - Config(key) - returns value of NeoFS configuration with key 'key' + - ListConfig() - returns array of all key-value pairs of NeoFS configuration + - SetConfig(id, key, value) - set key-value pair as a NeoFS runtime configuration value + + Other utility operations: + - Version - returns contract version + - Cheque(id, script- hash, amount, script-hash) - sends gas assets back to the user if they were successfully + locked in NeoFS balance contract + + Parameters: + - (?) - parameter can be omitted + - pubKey - 33 bytes of public key + - id - unique byte sequence +*/ + import ( + "github.com/nspcc-dev/neo-go/pkg/interop/binary" + "github.com/nspcc-dev/neo-go/pkg/interop/blockchain" + "github.com/nspcc-dev/neo-go/pkg/interop/contract" "github.com/nspcc-dev/neo-go/pkg/interop/crypto" "github.com/nspcc-dev/neo-go/pkg/interop/engine" + "github.com/nspcc-dev/neo-go/pkg/interop/iterator" "github.com/nspcc-dev/neo-go/pkg/interop/runtime" "github.com/nspcc-dev/neo-go/pkg/interop/storage" "github.com/nspcc-dev/neo-go/pkg/interop/util" ) -type node struct { - addr []byte - pub []byte -} +type ( + ballot struct { + id []byte // id of the voting decision + n [][]byte // already voted inner ring nodes + block int // block with the last vote + } -type check struct { - id []byte - height []byte -} + node struct { + pub []byte + } -// GAS NEP-5 HASH -const tokenHash = "\x77\xea\x59\x6b\x7a\xdf\x7e\x4d\xd1\x40\x76\x97\x31\xb7\xd2\xf0\xe0\x6b\xcd\x9b" + cheque struct { + id []byte + } -const innerRingCandidateFee = 100 * 1000 * 1000 // 10^8 + record struct { + key []byte + val []byte + } +) -const version = 1 +const ( + // native gas token script hash + tokenHash = "\x3b\x7d\x37\x11\xc6\xf0\xcc\xf9\xb1\xdc\xa9\x03\xd1\xbf\xa1\xd8\x96\xf1\x23\x8c" + + defaultCandidateFee = 100 * 1_0000_0000 // 100 Fixed8 Gas + candidateFeeConfigKey = "InnerRingCandidateFee" + + version = 2 + + innerRingKey = "innerring" + voteKey = "ballots" + candidatesKey = "candidates" + cashedChequesKey = "cheques" + + blockDiff = 20 // change base on performance evaluation + publicKeySize = 33 + minInnerRingSize = 3 +) + +var ( + configPrefix = []byte("config") +) func Main(op string, args []interface{}) interface{} { // The trigger determines whether this smart-contract is being @@ -32,122 +100,99 @@ func Main(op string, args []interface{}) interface{} { return false } - /* - Utility operations - they will be changed in production: - - Deploy(params: address, pubKey, ... ) - setup initial inner ring state - - User operations: - - InnerRingList() - get list of inner ring nodes addresses and public keys - - InnerRingAddress(params: address, pubKey) - update address of the inner ring node with given public key - - InnerRingCandidateRemove(params: pubKey) - remove node with given public key from the inner ring candidate queue - - InnerRingCandidateAdd(params: address, pubKey) - add node to the inner ring candidate queue - - Deposit(params: pubKey, amount) - deposit GAS to the NeoFS account - - Withdraw(params: withdrawCheque) - withdraw GAS from the NeoFS account - - InnerRingUpdate(params: irCheque) - change list of inner ring nodes - - Version() - get version of the NeoFS smart-contract - - Params: - - address - string of the valid multiaddress (github.com/multiformats/multiaddr) - - pubKey - 33 byte public key - - withdrawCheque - serialized structure, that confirms GAS transfer; - contains inner ring signatures - - irCheque - serialized structure, that confirms new inner ring node list; - contains inner ring signatures - - */ - ctx := storage.GetContext() + switch op { - case "Deploy": - irList := getSerialized(ctx, "InnerRingList").([]node) - if len(irList) >= 3 { - panic("contract already deployed") + case "Init": + if storage.Get(ctx, innerRingKey) != nil { + panic("neofs: contract already deployed") } - ln := len(args) - if ln%2 != 0 { - panic("provide pairs of inner ring address and public key") + var irList []node + + for i := 0; i < len(args); i++ { + pub := args[i].([]byte) + irList = append(irList, node{pub: pub}) } - irList = []node{} - for i := 0; i < ln/2; i++ { - addr := args[i*2].([]byte) - pub := args[i*2+1].([]byte) - irList = append(irList, node{addr: addr, pub: pub}) - } + // initialize all storage slices + setSerialized(ctx, innerRingKey, irList) + setSerialized(ctx, voteKey, []ballot{}) + setSerialized(ctx, candidatesKey, []node{}) + setSerialized(ctx, cashedChequesKey, []cheque{}) - data := runtime.Serialize(irList) - storage.Put(ctx, "InnerRingList", data) - - data = runtime.Serialize([]interface{}{}) - storage.Put(ctx, "UsedVerifCheckList", data) - storage.Put(ctx, "InnerRingCandidates", data) + runtime.Log("neofs: contract initialized") return true case "InnerRingList": - irList := getSerialized(ctx, "InnerRingList").([]node) - - return irList - case "InnerRingAddress": - addr := args[0].([]byte) - pub := args[1].([]byte) - irList := getSerialized(ctx, "InnerRingList").([]node) - if !containsPub(irList, pub) { - panic("inner ring node does not exist") - } - - if runtime.CheckWitness(pub) { - n := node{addr: addr, pub: pub} - - delSerializedIR(ctx, "InnerRingList", pub) - putSerialized(ctx, "InnerRingList", n) - } - - return true + return getInnerRingNodes(ctx, innerRingKey) + case "InnerRingCandidates": + return getInnerRingNodes(ctx, candidatesKey) case "InnerRingCandidateRemove": - data := args[0].([]byte) // public key - if !runtime.CheckWitness(data) { - panic("you should be the owner of the public key") + if len(args) != 1 { + panic("irCandidateRemove: bad arguments") } - delSerializedIR(ctx, "InnerRingCandidates", data) + key := args[0].([]byte) // inner ring candidate public key + if !runtime.CheckWitness(key) { + panic("irCandidateRemove: you should be the owner of the public key") + } + + nodes := []node{} // it is explicit declaration of empty slice, not nil + candidates := getInnerRingNodes(ctx, candidatesKey) + + for i := range candidates { + c := candidates[i] + if !bytesEqual(c.pub, key) { + nodes = append(nodes, c) + } else { + runtime.Log("irCandidateRemove: candidate has been removed") + } + } + + setSerialized(ctx, candidatesKey, nodes) return true case "InnerRingCandidateAdd": - addr := args[0].([]byte) // valid multiaddr string - data := args[1].([]byte) // public key - - if !runtime.CheckWitness(data) { - panic("you should be the owner of the public key") + if len(args) != 1 { + panic("irCandidateAdd: bad arguments") } - candidates := getSerialized(ctx, "InnerRingCandidates").([]node) - if containsPub(candidates, data) { - panic("is already in list") + key := args[0].([]byte) // inner ring candidate public key + if !runtime.CheckWitness(key) { + panic("irCandidateAdd: you should be the owner of the public key") } - from := pubToScriptHash(data) - to := engine.GetExecutingScriptHash() - params := []interface{}{from, to, innerRingCandidateFee} + c := node{pub: key} + candidates := getInnerRingNodes(ctx, candidatesKey) + + list, ok := addNode(candidates, c) + if !ok { + panic("irCandidateAdd: candidate already in the list") + } + + from := contract.CreateStandardAccount(key) + to := runtime.GetExecutingScriptHash() + fee := getConfig(ctx, candidateFeeConfigKey).(int) + params := []interface{}{from, to, fee} transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) if !transferred { - panic("failed to transfer funds, aborting") + panic("irCandidateAdd: failed to transfer funds, aborting") } - candidate := node{ - addr: addr, - pub: data, - } - if !putSerialized(ctx, "InnerRingCandidates", candidate) { - panic("failed to put candidate into the queue") - } + runtime.Log("irCandidateAdd: candidate has been added") + setSerialized(ctx, candidatesKey, list) return true case "Deposit": - pk := args[0].([]byte) - if !runtime.CheckWitness(pk) { - panic("you should be the owner of the public key") + if len(args) < 2 || len(args) > 3 { + panic("deposit: bad arguments") + } + + from := args[0].([]byte) + if !runtime.CheckWitness(from) { + panic("deposit: you should be the owner of the wallet") } amount := args[1].(int) @@ -155,114 +200,290 @@ func Main(op string, args []interface{}) interface{} { amount = amount * 100000000 } - from := pubToScriptHash(pk) - to := engine.GetExecutingScriptHash() + to := runtime.GetExecutingScriptHash() params := []interface{}{from, to, amount} + transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) if !transferred { - panic("failed to transfer funds, aborting") + panic("deposit: failed to transfer funds, aborting") } - runtime.Log("funds have been transferred") + runtime.Log("deposit: funds have been transferred") + + var rcv = from + if len(args) == 3 { + rcv = args[2].([]byte) // todo: check if rcv value is valid + } + + tx := runtime.GetScriptContainer() + runtime.Notify("Deposit", from, amount, rcv, tx.Hash) return true case "Withdraw": - from := engine.GetExecutingScriptHash() - data := args[0].([]byte) - message := data[0:66] - uuid := data[0:25] - owner := data[25:50] - value := data[50:58] - height := data[58:66] - offset := 68 - usedList := getSerialized(ctx, "UsedVerifCheckList").([]check) - - c := check{ - id: uuid, - height: height, - } - if containsCheck(usedList, c) { - panic("verification check has already been used") + if len(args) != 2 { + panic("withdraw: bad arguments") } - irList := getSerialized(ctx, "InnerRingList").([]node) - if !verifySignatures(irList, data, message, offset) { - panic("can't verify signatures") + user := args[0].([]byte) + if !runtime.CheckWitness(user) { + panic("withdraw: you should be the owner of the wallet") } - h := owner[1:21] - params := []interface{}{from, h, value} - transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) - if !transferred { - panic("failed to transfer funds, aborting") + amount := args[1].(int) + if amount > 0 { + amount = amount * 100000000 } - putSerialized(ctx, "UsedVerifCheckList", c) + tx := runtime.GetScriptContainer() + runtime.Notify("Withdraw", user, amount, tx.Hash) + + return true + case "Cheque": + if len(args) != 4 { + panic("cheque: bad arguments") + } + + id := args[0].([]byte) // unique cheque id + user := args[1].([]byte) // GAS receiver + amount := args[2].(int) // amount of GAS + lockAcc := args[3].([]byte) // lock account from internal balance contract + + irList := getInnerRingNodes(ctx, innerRingKey) + threshold := len(irList)/3*2 + 1 + + cashedCheques := getCashedCheques(ctx) + hashID := crypto.SHA256(id) + + irKey := innerRingInvoker(irList) + if len(irKey) == 0 { + panic("cheque: invoked by non inner ring node") + } + + c := cheque{id: id} + + list, ok := addCheque(cashedCheques, c) + if !ok { + panic("cheque: non unique id") + } + + n := vote(ctx, hashID, irKey) + if n >= threshold { + removeVotes(ctx, hashID) + + from := runtime.GetExecutingScriptHash() + params := []interface{}{from, user, amount} + + transferred := engine.AppCall([]byte(tokenHash), "transfer", params).(bool) + if !transferred { + panic("cheque: failed to transfer funds, aborting") + } + + runtime.Log("cheque: funds have been transferred") + + setSerialized(ctx, cashedChequesKey, list) + runtime.Notify("Cheque", id, user, amount, lockAcc) + } + + return true + case "Bind", "Unbind": + if len(args) < 2 { + panic("binding: bad arguments") + } + + user := args[0].([]byte) + if !runtime.CheckWitness(user) { + panic("binding: you should be the owner of the wallet") + } + + var keys [][]byte + + for i := 1; i < len(args); i++ { + pub := args[i].([]byte) + if len(pub) != publicKeySize { + panic("binding: incorrect public key size") + } + + keys = append(keys, pub) + } + + runtime.Notify(op, user, keys) return true case "InnerRingUpdate": - data := args[0].([]byte) - - id := data[:8] - var ln interface{} = data[8:10] - listItemCount := ln.(int) - listSize := listItemCount * 33 - - offset := 8 + 2 + listSize - msg := data[:offset] - message := crypto.SHA256(msg) - - irList := getSerialized(ctx, "InnerRingList").([]node) - if !verifySignatures(irList, data, message, offset) { - panic("can't verify signatures") + if len(args) < 1+minInnerRingSize { + // cheque id + inner ring public keys + panic("irUpdate: bad arguments") } - usedList := getSerialized(ctx, "UsedVerifCheckList").([]check) - c := check{ - id: id, - height: []byte{1}, // ir update cheques use height as id - } - if containsCheck(usedList, c) { - panic("check has already been used") + irList := getInnerRingNodes(ctx, innerRingKey) + threshold := len(irList)/3*2 + 1 + + irKey := innerRingInvoker(irList) + if len(irKey) == 0 { + panic("innerRingUpdate: invoked by non inner ring node") } - candidates := getSerialized(ctx, "InnerRingCandidates").([]node) - offset = 10 + id := args[0].([]byte) + c := cheque{id: id} + + cashedCheques := getCashedCheques(ctx) + + chequesList, ok := addCheque(cashedCheques, c) + if !ok { + panic("irUpdate: non unique id") + } + + oldNodes := 0 + candidates := getInnerRingNodes(ctx, candidatesKey) newIR := []node{} loop: - for i := 0; i < listItemCount; i, offset = i+1, offset+33 { - pub := data[offset : offset+33] + for i := 1; i < len(args); i++ { + key := args[i].([]byte) + if len(key) != publicKeySize { + panic("irUpdate: invalid public key in inner ring list") + } + // find key in actual inner ring list for j := 0; j < len(irList); j++ { n := irList[j] - if util.Equals(n.pub, pub) { + if bytesEqual(n.pub, key) { newIR = append(newIR, n) + oldNodes++ + continue loop } } - for j := 0; j < len(candidates); j++ { - n := candidates[j] - if util.Equals(n.pub, pub) { - newIR = append(newIR, n) - continue loop - } + // find key in candidates list + candidates, newIR, ok = rmNodeByKey(candidates, newIR, key) + if !ok { + panic("irUpdate: unknown public key in inner ring list") } } - if len(newIR) != listItemCount { - panic("new inner ring wasn't processed correctly") + if oldNodes < len(newIR)*2/3+1 { + panic("irUpdate: inner ring change rate must not be more than 1/3 ") } - for i := 0; i < len(newIR); i++ { - n := newIR[i] - delSerializedIR(ctx, "InnerRingCandidates", n.pub) + hashID := crypto.SHA256(id) + + n := vote(ctx, hashID, irKey) + if n >= threshold { + removeVotes(ctx, hashID) + + setSerialized(ctx, candidatesKey, candidates) + setSerialized(ctx, innerRingKey, newIR) + setSerialized(ctx, cashedChequesKey, chequesList) + + runtime.Notify("InnerRingUpdate", c.id, newIR) + runtime.Log("irUpdate: inner ring list has been updated") } - newIRData := runtime.Serialize(newIR) - storage.Put(ctx, "InnerRingList", newIRData) - putSerialized(ctx, "UsedVerifCheckList", c) + return true + case "IsInnerRing": + if len(args) != 1 { + panic("isInnerRing: wrong arguments") + } + + key := args[0].([]byte) + if len(key) != publicKeySize { + panic("isInnerRing: incorrect public key") + } + + irList := getInnerRingNodes(ctx, innerRingKey) + for i := range irList { + node := irList[i] + + if bytesEqual(node.pub, key) { + return true + } + } + + return false + case "Config": + if len(args) != 1 { + panic("config: bad arguments") + } + + key := args[0].([]byte) + + return getConfig(ctx, key) + case "SetConfig": + if len(args) != 3 { + panic("setConfig: bad arguments") + } + + // check if it is inner ring invocation + irList := getInnerRingNodes(ctx, innerRingKey) + threshold := len(irList)/3*2 + 1 + + irKey := innerRingInvoker(irList) + if len(irKey) == 0 { + panic("setConfig: invoked by non inner ring node") + } + + // check unique id of the operation + id := args[0].([]byte) + c := cheque{id: id} + cashedCheques := getCashedCheques(ctx) + + chequesList, ok := addCheque(cashedCheques, c) + if !ok { + panic("setConfig: non unique id") + } + + // vote for new configuration value + hashID := crypto.SHA256(id) + + n := vote(ctx, hashID, irKey) + if n >= threshold { + removeVotes(ctx, hashID) + + key := args[1] + val := args[2] + + setConfig(ctx, key, val) + setSerialized(ctx, cashedChequesKey, chequesList) + + runtime.Notify("SetConfig", id, key, val) + runtime.Log("setConfig: configuration has been updated") + } + + return true + case "ListConfig": + var config []record + + it := storage.Find(ctx, configPrefix) + for iterator.Next(it) { + key := iterator.Key(it).([]byte) + val := iterator.Value(it).([]byte) + r := record{key: key[len(configPrefix):], val: val} + + config = append(config, r) + } + + return config + case "InitConfig": + if getConfig(ctx, candidateFeeConfigKey) != nil { + panic("neofs: configuration already installed") + } + + ln := len(args) + if ln%2 != 0 { + panic("initConfig: bad arguments") + } + + setConfig(ctx, candidateFeeConfigKey, defaultCandidateFee) + + for i := 0; i < ln/2; i++ { + key := args[i*2] + val := args[i*2+1] + + setConfig(ctx, key, val) + } + + runtime.Log("neofs: config has been installed") return true case "Version": @@ -272,144 +493,186 @@ func Main(op string, args []interface{}) interface{} { panic("unknown operation") } -func getSerialized(ctx storage.Context, key string) interface{} { - data := storage.Get(ctx, key).([]byte) - if len(data) != 0 { - return runtime.Deserialize(data) +// innerRingInvoker returns public key of inner ring node that invoked contract. +func innerRingInvoker(ir []node) []byte { + for i := 0; i < len(ir); i++ { + node := ir[i] + if runtime.CheckWitness(node.pub) { + return node.pub + } } + return nil } -func delSerialized(ctx storage.Context, key string, value []byte) bool { - data := storage.Get(ctx, key).([]byte) - deleted := false +// vote adds ballot for the decision with specific 'id' and returns amount +// on unique voters for that decision. +func vote(ctx storage.Context, id, from []byte) int { + var ( + newCandidates = []ballot{} // it is explicit declaration of empty slice, not nil + candidates = getBallots(ctx) + found = -1 + blockHeight = blockchain.GetHeight() + ) - var newList [][]byte - if len(data) != 0 { - lst := runtime.Deserialize(data).([][]byte) - for i := 0; i < len(lst); i++ { - if util.Equals(value, lst[i]) { - deleted = true - } else { - newList = append(newList, lst[i]) - } - } - if deleted { - if len(newList) != 0 { - data := runtime.Serialize(newList) - storage.Put(ctx, key, data) - } else { - storage.Delete(ctx, key) - } - runtime.Log("target element has been removed") - return true - } + for i := 0; i < len(candidates); i++ { + cnd := candidates[i] + if bytesEqual(cnd.id, id) { + voters := cnd.n - } - - runtime.Log("target element has not been removed") - return false -} - -func putSerialized(ctx storage.Context, key string, value interface{}) bool { - data := storage.Get(ctx, key).([]byte) - - var lst []interface{} - if len(data) != 0 { - lst = runtime.Deserialize(data).([]interface{}) - } - - lst = append(lst, value) - data = runtime.Serialize(lst) - storage.Put(ctx, key, data) - - return true -} - -func pubToScriptHash(pkey []byte) []byte { - pre := []byte{0x21} - buf := append(pre, pkey...) - buf = append(buf, 0xac) - h := crypto.Hash160(buf) - return h -} - -func containsCheck(lst []check, c check) bool { - for i := 0; i < len(lst); i++ { - if util.Equals(c, lst[i]) { - return true - } - } - return false -} -func containsPub(lst []node, elem []byte) bool { - for i := 0; i < len(lst); i++ { - e := lst[i] - if util.Equals(elem, e.pub) { - return true - } - } - return false -} - -func delSerializedIR(ctx storage.Context, key string, value []byte) bool { - data := storage.Get(ctx, key).([]byte) - deleted := false - - newList := []node{} - if len(data) != 0 { - lst := runtime.Deserialize(data).([]node) - for i := 0; i < len(lst); i++ { - n := lst[i] - if util.Equals(value, n.pub) { - deleted = true - } else { - newList = append(newList, n) - } - } - if deleted { - data := runtime.Serialize(newList) - storage.Put(ctx, key, data) - runtime.Log("target element has been removed") - return true - } - } - - runtime.Log("target element has not been removed") - return false -} -func verifySignatures(irList []node, data []byte, message []byte, offset int) bool { - n := len(irList) - f := (n - 1) / 3 - s := n - f - if s < 3 { - runtime.Log("not enough inner ring nodes for consensus") - return false - } - - used := [][]byte{} - count := 0 - for count < s && offset < len(data) { - pubkey := data[offset : offset+33] - signature := data[offset+33 : offset+97] - if containsPub(irList, pubkey) { - if crypto.VerifySignature(message, signature, pubkey) { - count++ - for i := 0; i < len(used); i++ { - if util.Equals(used[i], pubkey) { - panic("duplicate public keys") - } + for j := range voters { + if bytesEqual(voters[j], from) { + return len(voters) } - used = append(used, pubkey) } + + voters = append(voters, from) + cnd = ballot{id: id, n: voters, block: blockHeight} + found = len(voters) + } + + // do not add old ballots, they are invalid + if blockHeight-cnd.block <= blockDiff { + newCandidates = append(newCandidates, cnd) } - offset += 97 } - if count >= s { - return true + if found < 0 { + found = 1 + voters := [][]byte{from} + + newCandidates = append(newCandidates, ballot{ + id: id, + n: voters, + block: blockHeight}) } - runtime.Log("not enough verified signatures") - return false + setSerialized(ctx, voteKey, newCandidates) + + return found +} + +// removeVotes clears ballots of the decision that has benn aceepted by +// inner ring nodes. +func removeVotes(ctx storage.Context, id []byte) { + var ( + newCandidates = []ballot{} // it is explicit declaration of empty slice, not nil + candidates = getBallots(ctx) + ) + + for i := 0; i < len(candidates); i++ { + cnd := candidates[i] + if !bytesEqual(cnd.id, id) { + newCandidates = append(newCandidates, cnd) + } + } + + setSerialized(ctx, voteKey, newCandidates) +} + +// setSerialized serializes data and puts it into contract storage. +func setSerialized(ctx storage.Context, key interface{}, value interface{}) { + data := binary.Serialize(value) + storage.Put(ctx, key, data) +} + +// getInnerRingNodes returns deserialized slice of inner ring nodes from storage. +func getInnerRingNodes(ctx storage.Context, key string) []node { + data := storage.Get(ctx, key) + if data != nil { + return binary.Deserialize(data.([]byte)).([]node) + } + + return []node{} +} + +// getInnerRingNodes returns deserialized slice of used cheques. +func getCashedCheques(ctx storage.Context) []cheque { + data := storage.Get(ctx, cashedChequesKey) + if data != nil { + return binary.Deserialize(data.([]byte)).([]cheque) + } + + return []cheque{} +} + +// getInnerRingNodes returns deserialized slice of vote ballots. +func getBallots(ctx storage.Context) []ballot { + data := storage.Get(ctx, voteKey) + if data != nil { + return binary.Deserialize(data.([]byte)).([]ballot) + } + + return []ballot{} +} + +// getConfig returns installed neofs configuration value or nil if it is not set. +func getConfig(ctx storage.Context, key interface{}) interface{} { + postfix := key.([]byte) + storageKey := append(configPrefix, postfix...) + + return storage.Get(ctx, storageKey) +} + +// setConfig sets neofs configuration value in the contract storage. +func setConfig(ctx storage.Context, key, val interface{}) { + postfix := key.([]byte) + storageKey := append(configPrefix, postfix...) + + storage.Put(ctx, storageKey, val) +} + +// addCheque returns slice of cheques with appended cheque 'c' and bool flag +// that set to false if cheque 'c' is already presented in the slice 'lst'. +func addCheque(lst []cheque, c cheque) ([]cheque, bool) { + for i := 0; i < len(lst); i++ { + if bytesEqual(c.id, lst[i].id) { + return nil, false + } + } + + lst = append(lst, c) + + return lst, true +} + +// addNode returns slice of nodes with appended node 'n' and bool flag +// that set to false if node 'n' is already presented in the slice 'lst'. +func addNode(lst []node, n node) ([]node, bool) { + for i := 0; i < len(lst); i++ { + if bytesEqual(n.pub, lst[i].pub) { + return nil, false + } + } + + lst = append(lst, n) + + return lst, true +} + +// rmNodeByKey returns slice of nodes without node with key 'k', +// slices of nodes 'add' with node with key 'k' and bool flag, +// that set to false if node with a key 'k' does not exists in the slice 'lst'. +func rmNodeByKey(lst, add []node, k []byte) ([]node, []node, bool) { + var ( + flag bool + newLst = []node{} // it is explicit declaration of empty slice, not nil + ) + + for i := 0; i < len(lst); i++ { + if bytesEqual(k, lst[i].pub) { + add = append(add, lst[i]) + flag = true + } else { + newLst = append(newLst, lst[i]) + } + } + + return newLst, add, flag +} + +// bytesEqual compares two slice of bytes by wrapping them into strings, +// which is necessary with new util.Equal interop behaviour, see neo-go#1176. +func bytesEqual(a []byte, b []byte) bool { + return util.Equals(string(a), string(b)) } diff --git a/neofs_contract_test.go b/neofs_contract_test.go deleted file mode 100644 index 1dc1474..0000000 --- a/neofs_contract_test.go +++ /dev/null @@ -1,534 +0,0 @@ -package smart_contract - -import ( - "bytes" - "crypto/ecdsa" - "crypto/elliptic" - "crypto/rand" - "encoding/hex" - "fmt" - "math/big" - "os" - "testing" - - "github.com/multiformats/go-multiaddr" - "github.com/nspcc-dev/neo-go/pkg/compiler" - "github.com/nspcc-dev/neo-go/pkg/crypto/keys" - "github.com/nspcc-dev/neo-go/pkg/io" - "github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger" - "github.com/nspcc-dev/neo-go/pkg/util" - "github.com/nspcc-dev/neo-go/pkg/vm" - "github.com/nspcc-dev/neo-go/pkg/vm/emit" - "github.com/nspcc-dev/neofs-api-go/accounting" - "github.com/nspcc-dev/neofs-api-go/decimal" - "github.com/nspcc-dev/neofs-api-go/refs" - crypto "github.com/nspcc-dev/neofs-crypto" - "github.com/nspcc-dev/neofs-crypto/test" - "github.com/stretchr/testify/require" -) - -const contractTemplate = "./neofs_contract.go" - -var ( - contractHash = util.Uint160{0x1, 0x2, 0x3, 0x4} - // token hash is not random to run tests of .avm or .go files - contractStr = string(contractHash[:]) -) - -type contract struct { - script []byte - addrs []multiaddr.Multiaddr - privs []*ecdsa.PrivateKey - cgasHash string -} - -func TestContract(t *testing.T) { - const nodeCount = 6 - plug := newStoragePlugin(t) - contract := initGoContract(t, contractTemplate, nodeCount) - - plug.cgas[contractStr] = util.Fixed8FromInt64(1000) - - // fail if odd number of arguments provided - v := initVM(contract, plug) - loadArg(t, v, "Deploy", []interface{}{contract.addrs[0].String()}) - require.Error(t, v.Run()) - - // correct arguments - var args []interface{} - for i := range contract.addrs { - args = append(args, contract.addrs[i].String()) - args = append(args, crypto.MarshalPublicKey(&contract.privs[i].PublicKey)) - } - - v = initVM(contract, plug) - loadArg(t, v, "Deploy", args) - require.NoError(t, v.Run()) - - // double withdraw - v = initVM(contract, plug) - loadArg(t, v, "Deploy", args) - require.Error(t, v.Run()) - - t.Run("InnerRingAddress", func(t *testing.T) { - newAddr, err := multiaddr.NewMultiaddr("/dns6/fdb5:7305:0adf:0b0b::/tcp/8080") - require.NoError(t, err) - - previousAddr := contract.addrs[0] - key := crypto.MarshalPublicKey(&contract.privs[0].PublicKey) - - v := initVM(contract, plug) - loadArg(t, v, "InnerRingAddress", []interface{}{newAddr.String(), key}) - require.NoError(t, v.Run()) - require.False(t, bytes.Contains(plug.mem["InnerRingList"], []byte(previousAddr.String()))) - require.True(t, bytes.Contains(plug.mem["InnerRingList"], []byte(newAddr.String()))) - - contract.addrs[0] = newAddr - }) - - t.Run("Deposit", func(t *testing.T) { - v := initVM(contract, plug) - before := plug.cgas[contractStr] - - key := mustHex("031a6c6fbbdf02ca351745fa86b9ba5a9452d785ac4f7fc2b7548ca2a46c4fcf4a") - plug.setCGASBalance(key, 4000) - - loadArg(t, v, "Deposit", []interface{}{key, 1000}) - require.NoError(t, v.Run()) - - require.Equal(t, before+util.Fixed8FromInt64(1000), plug.cgas[contractStr]) - require.Equal(t, util.Fixed8FromInt64(3000), plug.cgas[string(mustPKey(key).GetScriptHash().BytesBE())]) - }) - - t.Run("Withdraw", func(t *testing.T) { - const amount = 21 - - v := initVM(contract, plug) - owner, cheque := getCheque(t, contract, amount) - ownerStr := string(owner[1:21]) - contractGas := plug.cgas[contractStr] - - loadArg(t, v, "Withdraw", []interface{}{cheque}) - require.NoError(t, v.Run()) - require.Equal(t, contractGas-util.Fixed8FromInt64(amount), plug.cgas[contractStr]) - require.Equal(t, util.Fixed8FromInt64(amount), plug.cgas[ownerStr]) - - t.Run("Double Withdraw", func(t *testing.T) { - v := initVM(contract, plug) - - loadArg(t, v, "Withdraw", []interface{}{cheque}) - require.Error(t, v.Run()) - }) - }) - - t.Run("InnerRingCandidateAdd", func(t *testing.T) { - v := initVM(contract, plug) - before := plug.cgas[contractStr] - - key := crypto.MarshalPublicKey(&test.DecodeKey(1).PublicKey) - plug.setCGASBalance(key, 4000) - - loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"/ip6/2001:4860:4860::8888/tcp/80", key}) - require.NoError(t, v.Run()) - - fee := util.Fixed8FromInt64(1) - - require.Equal(t, before+fee, plug.cgas[contractStr]) - require.Equal(t, util.Fixed8FromInt64(4000)-fee, - plug.cgas[string(mustPKey(key).GetScriptHash().BytesBE())]) - require.True(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) - - t.Run("Double InnerRingCandidateAdd", func(t *testing.T) { - v := initVM(contract, plug) - loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"/ip4/8.8.8.8/tcp/80", key}) - require.Error(t, v.Run()) - }) - }) - - t.Run("InnerRingCandidateRemove", func(t *testing.T) { - key := crypto.MarshalPublicKey(&test.DecodeKey(2).PublicKey) - plug.setCGASBalance(key, 4000) - - v := initVM(contract, plug) - loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"/ip6/2001:4860:4860::8888/tcp/80", key}) - require.NoError(t, v.Run()) - require.True(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) - - t.Run("Remove unknown candidate", func(t *testing.T) { - v := initVM(contract, plug) - // unknown candidate - badKey := crypto.MarshalPublicKey(&test.DecodeKey(3).PublicKey) - loadArg(t, v, "InnerRingCandidateRemove", []interface{}{badKey}) - require.NoError(t, v.Run()) - require.True(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) - }) - - v = initVM(contract, plug) - key = mustHex("031a6c6fbbdf02ca351745fa86b9ba5a9452d785ac4f7fc2b7548ca2a46c4fcf4a") - loadArg(t, v, "InnerRingCandidateRemove", []interface{}{key}) - require.NoError(t, v.Run()) - require.False(t, bytes.Contains(plug.mem["InnerRingCandidates"], key)) - }) - - t.Run("InnerRingUpdate", func(t *testing.T) { - t.Skip("implement getIRExcludeCheque without neofs-node dependency") - - pubKey := &test.DecodeKey(4).PublicKey - key := crypto.MarshalPublicKey(pubKey) - plug.setCGASBalance(key, 4000) - - var pubs []*ecdsa.PublicKey - for i := 0; i < len(contract.privs)-1; i++ { - pubs = append(pubs, &contract.privs[i].PublicKey) - } - pubs = append(pubs, pubKey) - cheque := getIRExcludeCheque(t, contract, pubs, 777) - - t.Run("Try without candidate", func(t *testing.T) { - v := initVM(contract, plug) - loadArg(t, v, "InnerRingUpdate", []interface{}{cheque}) - require.Error(t, v.Run()) - }) - - v := initVM(contract, plug) - loadArg(t, v, "InnerRingCandidateAdd", []interface{}{"addrX", key}) - require.NoError(t, v.Run()) - - v = initVM(contract, plug) - loadArg(t, v, "InnerRingUpdate", []interface{}{cheque}) - require.NoError(t, v.Run()) - - for i := 0; i < len(contract.privs)-1; i++ { - require.True(t, bytes.Contains(plug.mem["InnerRingList"], - crypto.MarshalPublicKey(&contract.privs[i].PublicKey))) - } - require.True(t, bytes.Contains(plug.mem["InnerRingList"], key)) - - t.Run("Double InnerRingUpdate", func(t *testing.T) { - newCheque := getIRExcludeCheque(t, contract, pubs, 777) - v = initVM(contract, plug) - loadArg(t, v, "InnerRingUpdate", []interface{}{newCheque}) - require.Error(t, v.Run()) - }) - }) -} - -func getCheque(t *testing.T, c *contract, amount int64) (refs.OwnerID, []byte) { - id, err := accounting.NewChequeID() - require.NoError(t, err) - - priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader) - require.NoError(t, err) - - owner, err := refs.NewOwnerID(&priv.PublicKey) - require.NoError(t, err) - - cheque := accounting.Cheque{ - ID: id, - Owner: owner, - Amount: decimal.NewGAS(amount), - Height: 0, - } - - for _, key := range c.privs { - require.NoError(t, cheque.Sign(key)) - } - - data, err := cheque.MarshalBinary() - require.NoError(t, err) - - return owner, data -} - -func getIRExcludeCheque(t *testing.T, c *contract, pub []*ecdsa.PublicKey, id uint64) []byte { - panic("implement without neofs-node dependency") -} - -func initGoContract(t *testing.T, path string, n int) *contract { - f, err := os.Open(path) - require.NoError(t, err) - - defer f.Close() - - buf, err := compiler.Compile(f) - require.NoError(t, err) - - return &contract{script: buf, privs: getKeys(t, n), addrs: getAddrs(t, n)} -} - -func getKeys(t *testing.T, n int) []*ecdsa.PrivateKey { - privs := make([]*ecdsa.PrivateKey, n) - for i := range privs { - var err error - - privs[i], err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader) - require.NoError(t, err) - } - - return privs -} - -func getAddrs(t *testing.T, n int) []multiaddr.Multiaddr { - const template = "/dns4/10.120.14.%d/tcp/8080" - - addrs := make([]multiaddr.Multiaddr, n) - for i := range addrs { - var err error - - addrs[i], err = multiaddr.NewMultiaddr(fmt.Sprintf(template, i)) - require.NoError(t, err) - } - - return addrs -} - -func mustHex(s string) []byte { - result, err := hex.DecodeString(s) - if err != nil { - panic(fmt.Errorf("invalid hex: %v", err)) - } - - return result -} - -func initVM(c *contract, plug *storagePlugin) *vm.VM { - v := vm.New() - v.Load(c.script) - v.SetScriptGetter(plug.getScript) - v.RegisterInteropGetter(plug.getInterop) - - return v -} - -func loadArg(t *testing.T, v *vm.VM, operation string, params []interface{}) { - arr := make([]vm.StackItem, len(params)) - for i := range arr { - arr[i] = toStackItem(params[i]) - require.NotNil(t, arr[i], "invalid stack item") - } - v.Estack().PushVal(vm.NewArrayItem(arr)) - v.Estack().PushVal(operation) -} - -func toStackItem(v interface{}) vm.StackItem { - switch val := v.(type) { - case int: - return vm.NewBigIntegerItem(val) - case string: - return vm.NewByteArrayItem([]byte(val)) - case []byte: - return vm.NewByteArrayItem(val) - default: - return nil - } -} - -const cgasSyscall = "MockCGAS" - -type kv struct { - Operation string - Key []byte - Value []byte -} - -type storagePlugin struct { - mem map[string][]byte - cgas map[string]util.Fixed8 - interops map[uint32]vm.InteropFunc - storageOps []kv - notify []interface{} -} - -func newStoragePlugin(t *testing.T) *storagePlugin { - s := &storagePlugin{ - mem: make(map[string][]byte), - cgas: make(map[string]util.Fixed8), - interops: make(map[uint32]vm.InteropFunc), - } - - s.interops[getID("Neo.Storage.Delete")] = s.Delete - s.interops[getID("Neo.Storage.Get")] = s.Get - s.interops[getID("Neo.Storage.GetContext")] = s.GetContext - s.interops[getID("Neo.Storage.Put")] = s.Put - s.interops[getID("Neo.Runtime.GetExecutingScriptHash")] = s.GetExecutingScriptHash - s.interops[getID("Neo.Runtime.GetTrigger")] = s.GetTrigger - s.interops[getID("Neo.Runtime.CheckWitness")] = s.CheckWitness - s.interops[getID("System.ExecutionEngine.GetExecutingScriptHash")] = s.GetExecutingScriptHash - s.interops[getID(cgasSyscall)] = s.CGASInvoke - s.interops[getID("Neo.Runtime.Log")] = func(v *vm.VM) error { - msg := string(v.Estack().Pop().Bytes()) - t.Log(msg) - return nil - } - s.interops[getID("Neo.Runtime.Notify")] = func(v *vm.VM) error { - val := v.Estack().Pop().Value() - s.notify = append(s.notify, toInterface(val)) - return nil - } - - return s -} - -func toInterface(val interface{}) interface{} { - switch v := val.(type) { - case []vm.StackItem: - arr := make([]interface{}, len(v)) - for i, item := range v { - arr[i] = toInterface(item) - } - return arr - case vm.StackItem: - return toInterface(v.Value()) - default: - return v - } -} - -func getID(name string) uint32 { - return vm.InteropNameToID([]byte(name)) -} - -func (s *storagePlugin) getInterop(id uint32) *vm.InteropFuncPrice { - f := s.interops[id] - if f != nil { - return &vm.InteropFuncPrice{Func: f, Price: 1} - } - - switch id { - case getID("Neo.Runtime.Serialize"): - case getID("Neo.Runtime.Deserialize"): - default: - panic("unexpected interop") - } - - return nil -} - -func mustPKey(pub []byte) *keys.PublicKey { - var pk keys.PublicKey - if err := pk.DecodeBytes(pub); err != nil { - panic(err) - } - return &pk -} - -func (s *storagePlugin) setCGASBalance(pub []byte, amount int64) { - pk := mustPKey(pub) - from := string(pk.GetScriptHash().BytesBE()) - s.cgas[from] = util.Fixed8FromInt64(amount) -} - -func (s *storagePlugin) CGASInvoke(v *vm.VM) error { - op := string(v.Estack().Pop().Bytes()) - args := v.Estack().Pop().Array() - - var result bool - - switch op { - case "transfer": - from := args[0].Value().([]byte) - to := args[1].Value().([]byte) - if len(from) != 20 || len(to) != 20 { - panic("invalid arguments") - } - - var amount util.Fixed8 - val := args[2].Value() - switch v := val.(type) { - case *big.Int: - amount = util.Fixed8(v.Int64()) - case []byte: - amount = util.Fixed8(emit.BytesToInt(v).Int64()) - default: - panic("invalid amount") - } - - if s.cgas[string(from)] >= amount { - s.cgas[string(from)] -= amount - s.cgas[string(to)] += amount - result = true - } - - default: - panic("invalid operation") - } - - v.Estack().PushVal(result) - - return nil -} - -func (s *storagePlugin) getScript(u util.Uint160) ([]byte, bool) { - var realHash util.Uint160 - copy(realHash[:], tokenHash[:]) - if u.Equals(realHash) { - buf := io.NewBufBinWriter() - emit.Syscall(buf.BinWriter, cgasSyscall) - return buf.Bytes(), false - } - panic("wrong script hash") -} - -func (s *storagePlugin) GetTrigger(v *vm.VM) error { - // todo: remove byte casting when neo-go issue will be resolved - // https: //github.com/nspcc-dev/neo-go/issues/776 - v.Estack().PushVal(byte(trigger.Application)) - return nil -} - -func (s *storagePlugin) CheckWitness(v *vm.VM) error { - v.Estack().PushVal(true) - return nil -} - -func (s *storagePlugin) GetExecutingScriptHash(v *vm.VM) error { - var h util.Uint160 - copy(h[:], contractHash[:]) - v.Estack().PushVal(h.BytesBE()) - return nil -} - -func (s *storagePlugin) logStorage(op string, key, value []byte) { - s.storageOps = append(s.storageOps, kv{ - Operation: op, - Key: key, - Value: value, - }) -} - -func (s *storagePlugin) Delete(v *vm.VM) error { - v.Estack().Pop() - key := v.Estack().Pop().Bytes() - s.logStorage("Delete", key, s.mem[string(key)]) - delete(s.mem, string(key)) - return nil -} - -func (s *storagePlugin) Put(v *vm.VM) error { - v.Estack().Pop() - key := v.Estack().Pop().Bytes() - value := v.Estack().Pop().Bytes() - s.logStorage("Put", key, value) - s.mem[string(key)] = value - return nil -} - -func (s *storagePlugin) Get(v *vm.VM) error { - v.Estack().Pop() - item := v.Estack().Pop().Bytes() - if val, ok := s.mem[string(item)]; ok { - v.Estack().PushVal(val) - s.logStorage("Get", item, val) - return nil - } - v.Estack().PushVal([]byte{}) - s.logStorage("Get", item, nil) - return nil -} - -func (s *storagePlugin) GetContext(v *vm.VM) error { - // Pushing anything on the stack here will work. This is just to satisfy - // the compiler, thinking it has pushed the context ^^. - v.Estack().PushVal(10) - return nil -}