zcnbridge

package
v1.12.1 Latest Latest
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 Go to latest Published: Feb 8, 2024 License: MIT Imports: 46 Imported by: 1

README

Bridge SDK documentation

This bridge SDK comprises 3 types of client and following available methods

  1. Bridge deployer/owner for Authorizer Smart Contract
  2. Customer/client to execute Bridge Smart contract burn and mint transactions
  3. Token bridge authorizer for signing payload for 0Chain and Ethereum chain

Bridge owner SDK

Deployer or Owner SDK is required to Add or Remove Authorizers from Authorizers Smart Contract

Configuration file: ~/.zcn/owner.yaml to initialize owner

owner:
    # Address of Ethereum authorizers contract
    AuthorizersAddress: "0xFE20Ce9fBe514397427d20C91CB657a4478A0FFa"
    OwnerEthereumMnemonic: "add here the owner mnemonic that has deployed auth and bridge contracts"

Authorizes config: ~/.zcn/authorizers.yaml to add authorizers

Example:

transaction, err := owner.AddEthereumAuthorizer(context.TODO(), wallet.Address)
if err != nil {
    fmt.Println(err)
}

status, err := zcnbridge.ConfirmEthereumTransaction(transaction.Hash().String(), 5, time.Second*5)
if err != nil {
    fmt.Println(err)
}

Client SDK

This SDK is used to execute mint and burn transaction on both chains, Ethereum and 0Chain

Configuration file: ~/.zcn/bridge.yaml to initialize the client

Functionality:

  • Burn (0Chain and Ethereum)
  • Mint (0Chain and Ethereum)

For more detailed information please find documentation here

Token Bridge SDK

Functionality:

  1. Used by token bridge to sign payloads for 0Chain and Ethereum chains
  2. Checks transactions status and give the client payload to

Documentation

Index

Constants

View Source 
const (
	ZChainsClientConfigName  = "config.yaml"
	ZChainWalletConfigName   = "wallet.json"
	EthereumWalletStorageDir = "wallets"
)
View Source 
const (
	BancorNetworkAddress   = "0xeEF417e1D5CC832e619ae18D2F140De2999dD4fB"
	SourceTokenETHAddress  = "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE"
	SourceTokenUSDCAddress = "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
	SourceTokenEURCAddress = "0x1aBaEA1f7C830bD89Acc67eC4af516284b1bC33c"
	SourceTokenBNTAddress  = "0x1f573d6fb3f13d689ff844b4ce37794d79a7ff1c"
)
View Source 
const BancorAPIURL = "https://api-v3.bancor.network"

Variables

View Source 
var (
	DefaultClientIDEncoder = func(id string) []byte {
		result, err := hex.DecodeString(id)
		if err != nil {
			Logger.Fatal(err)
		}
		return result
	}
)
View Source 
var Logger logger.Logger

Functions

func AccountExists added in v1.3.5 

func AccountExists(homedir, address string) bool

AccountExists checks if account exists

func ConfirmEthereumTransaction 

func ConfirmEthereumTransaction(hash string, times int, duration time.Duration) (int, error)

func CreateKeyStorage added in v1.3.5 

func CreateKeyStorage(homedir, password string) error

CreateKeyStorage create, restore or unlock key storage

func DeleteAccount added in v1.4.7 

func DeleteAccount(homedir, address string) bool

DeleteAccount deletes account from wallet

func EncodePackInt64 added in v1.11.0 

func EncodePackInt64(key string, param int64) common.Hash

EncodePackInt do abi.encodedPack(string, int), it is used for setting plan id for royalty

func GetAuthorizer added in v1.7.1 

func GetAuthorizer(id string, cb zcncore.GetInfoCallback) (err error)

GetAuthorizer returned authorizer by ID

func GetAuthorizers 

func GetAuthorizers(active bool, cb zcncore.GetInfoCallback) (err error)

GetAuthorizers Returns all or only active authorizers

func GetGlobalConfig added in v1.7.1 

func GetGlobalConfig(cb zcncore.GetInfoCallback) (err error)

GetGlobalConfig Returns global config

func GetTransactionStatus 

func GetTransactionStatus(hash string) (int, error)

func ImportAccount added in v1.3.5 

func ImportAccount(homedir, mnemonic, password string, accountAddrIndex ...AccountAddressIndex) (string, error)

ImportAccount imports account using mnemonic

func ListStorageAccounts added in v1.3.5 

func ListStorageAccounts(homedir string) []common.Address

ListStorageAccounts List available accounts

Types

type AccountAddressIndex added in v1.11.0 

type AccountAddressIndex struct {
	AccountIndex int
	AddressIndex int
	Bip32        bool
}

type AuthorizerNode 

type AuthorizerNode struct {
	ID  string `json:"id"`
	URL string `json:"url"`
}

type AuthorizerNodesResponse added in v1.7.1 

type AuthorizerNodesResponse struct {
	Nodes []*AuthorizerNode `json:"nodes"`
}

type AuthorizerResponse added in v1.7.1 

type AuthorizerResponse struct {
	AuthorizerID string `json:"id"`
	URL          string `json:"url"`

	// Configuration
	Fee common.Balance `json:"fee"`

	// Geolocation
	Latitude  float64 `json:"latitude"`
	Longitude float64 `json:"longitude"`

	// Stats
	LastHealthCheck int64 `json:"last_health_check"`

	// stake_pool_settings
	DelegateWallet string         `json:"delegate_wallet"`
	MinStake       common.Balance `json:"min_stake"`
	MaxStake       common.Balance `json:"max_stake"`
	NumDelegates   int            `json:"num_delegates"`
	ServiceCharge  float64        `json:"service_charge"`
}

type BancorTokenDetails added in v1.11.0 

type BancorTokenDetails struct {
	Data struct {
		Rate struct {
			ETH  string `json:"eth"`
			BNT  string `json:"bnt"`
			USDC string `json:"usd"`
			EURC string `json:"eur"`
		}
	} `json:"data"`
}

BancorTokenDetails describes Bancor ZCN zcntoken pool details

type BridgeClient added in v1.3.5 

type BridgeClient struct {
	BridgeAddress,
	TokenAddress,
	AuthorizersAddress,
	NFTConfigAddress,
	EthereumAddress,
	Password string

	BancorAPIURL string

	ConsensusThreshold float64
	GasLimit           uint64
	// contains filtered or unexported fields
}

func NewBridgeClient added in v1.11.0 

func NewBridgeClient(
	bridgeAddress,
	tokenAddress,
	authorizersAddress,
	ethereumAddress,
	password string,
	gasLimit uint64,
	consensusThreshold float64,
	bancorAPIURL string,
	ethereumClient EthereumClient,
	transactionProvider transaction.TransactionProvider,
	keyStore KeyStore) *BridgeClient

NewBridgeClient creates BridgeClient with the given parameters.

func SetupBridgeClientSDK added in v1.3.5 

func SetupBridgeClientSDK(cfg *BridgeSDKConfig) *BridgeClient

SetupBridgeClientSDK initializes new bridge client. Meant to be used from standalone application with 0chain SDK initialized.

func (*BridgeClient) AddEthereumAuthorizer added in v1.8.17 

func (b *BridgeClient) AddEthereumAuthorizer(ctx context.Context, address common.Address) (*types.Transaction, error)

AddEthereumAuthorizer Adds authorizer to Ethereum bridge. Only contract deployer can call this method

func (*BridgeClient) AddEthereumAuthorizers added in v1.8.17 

func (b *BridgeClient) AddEthereumAuthorizers(configDir string)

func (*BridgeClient) ApproveSwap added in v1.11.0 

func (b *BridgeClient) ApproveSwap(ctx context.Context, sourceTokenAddress string, maxAmountSwap *big.Int) (*types.Transaction, error)

ApproveSwap provides opportunity to approve swap operation for ERC20 tokens

func (*BridgeClient) BurnWZCN added in v1.3.5 

func (b *BridgeClient) BurnWZCN(ctx context.Context, amountTokens uint64) (*types.Transaction, error)

BurnWZCN Burns WZCN tokens on behalf of the 0ZCN client amountTokens - ZCN tokens clientID - 0ZCN client ERC20 signature: "burn(uint256,bytes)"

func (*BridgeClient) BurnZCN added in v1.3.5 

func (b *BridgeClient) BurnZCN(ctx context.Context, amount, txnfee uint64) (transaction.Transaction, error)

BurnZCN burns ZCN tokens before conversion from ZCN to WZCN as a first step

func (*BridgeClient) CreateSignedTransactionFromKeyStore added in v1.8.17 

func (b *BridgeClient) CreateSignedTransactionFromKeyStore(client EthereumClient, gasLimitUnits uint64) *bind.TransactOpts

func (*BridgeClient) FetchZCNToSourceTokenRate added in v1.11.0 

func (b *BridgeClient) FetchZCNToSourceTokenRate(sourceTokenAddress string) (*big.Float, error)

FetchZCNToETHRate retrieves latest ZCN to ETH rate using Bancor API

func (*BridgeClient) GetMaxBancorTargetAmount added in v1.11.0 

func (b *BridgeClient) GetMaxBancorTargetAmount(sourceTokenAddress string, amountSwap uint64) (*big.Int, error)

GetMaxBancorTargetAmount retrieves max amount of a given source token for Bancor swap

func (*BridgeClient) GetTokenBalance added in v1.11.0 

func (b *BridgeClient) GetTokenBalance() (*big.Int, error)

GetTokenBalance returns balance of the current client for the zcntoken address

func (*BridgeClient) GetUserNonceMinted added in v1.8.11 

func (b *BridgeClient) GetUserNonceMinted(ctx context.Context, rawEthereumAddress string) (*big.Int, error)

GetUserNonceMinted Returns nonce for a specified Ethereum address

func (*BridgeClient) IncreaseBurnerAllowance added in v1.3.5 

func (b *BridgeClient) IncreaseBurnerAllowance(ctx context.Context, allowanceAmount uint64) (*types.Transaction, error)

IncreaseBurnerAllowance Increases allowance for bridge contract address to transfer ERC-20 tokens on behalf of the zcntoken owner to the Burn TokenPool During the burn the script transfers amount from zcntoken owner to the bridge burn zcntoken pool Example: owner wants to burn some amount. The contract will transfer some amount from owner address to the pool. So the owner must call IncreaseAllowance of the WZCN zcntoken with 2 parameters: spender address which is the bridge contract and amount to be burned (transferred) Token signature: "increaseApproval(address,uint256)"

func (*BridgeClient) MintWZCN added in v1.3.5 

func (b *BridgeClient) MintWZCN(ctx context.Context, payload *ethereum.MintPayload) (*types.Transaction, error)

MintWZCN Mint ZCN tokens on behalf of the 0ZCN client payload: received from authorizers

func (*BridgeClient) MintZCN added in v1.3.5 

func (b *BridgeClient) MintZCN(ctx context.Context, payload *zcnsc.MintPayload) (string, error)

MintZCN mints ZCN tokens after receiving proof-of-burn of WZCN tokens

func (*BridgeClient) NFTConfigGetAddress added in v1.11.0 

func (b *BridgeClient) NFTConfigGetAddress(ctx context.Context, key string) (string, string, error)

func (*BridgeClient) NFTConfigGetUint256 added in v1.11.0 

func (b *BridgeClient) NFTConfigGetUint256(ctx context.Context, key string, keyParam ...int64) (string, int64, error)

func (*BridgeClient) NFTConfigSetAddress added in v1.11.0 

func (b *BridgeClient) NFTConfigSetAddress(ctx context.Context, key, address string) (*types.Transaction, error)

func (*BridgeClient) NFTConfigSetUint256 added in v1.11.0 

func (b *BridgeClient) NFTConfigSetUint256(ctx context.Context, key string, value int64) (*types.Transaction, error)

NFTConfigSetUint256 call setUint256 method of NFTConfig contract

func (*BridgeClient) NFTConfigSetUint256Raw added in v1.11.0 

func (b *BridgeClient) NFTConfigSetUint256Raw(ctx context.Context, key common.Hash, value int64) (*types.Transaction, error)

func (*BridgeClient) QueryEthereumBurnEvents added in v1.8.16 

func (b *BridgeClient) QueryEthereumBurnEvents(startNonce string) ([]*ethereum.BurnEvent, error)

QueryEthereumBurnEvents gets ethereum burn events

func (*BridgeClient) QueryEthereumMintPayload added in v1.3.5 

func (b *BridgeClient) QueryEthereumMintPayload(zchainBurnHash string) (*ethereum.MintPayload, error)

QueryEthereumMintPayload gets burn ticket and creates mint payload to be minted in the Ethereum chain zchainBurnHash - Ethereum burn transaction hash

func (*BridgeClient) QueryZChainMintPayload added in v1.3.5 

func (b *BridgeClient) QueryZChainMintPayload(ethBurnHash string) (*zcnsc.MintPayload, error)

QueryZChainMintPayload gets burn ticket and creates mint payload to be minted in the ZChain ethBurnHash - Ethereum burn transaction hash

func (*BridgeClient) RemoveEthereumAuthorizer added in v1.8.17 

func (b *BridgeClient) RemoveEthereumAuthorizer(ctx context.Context, address common.Address) (*types.Transaction, error)

RemoveEthereumAuthorizer Removes authorizer from Ethereum bridge. Only contract deployer can call this method

func (*BridgeClient) ResetUserNonceMinted added in v1.11.0 

func (b *BridgeClient) ResetUserNonceMinted(ctx context.Context) (*types.Transaction, error)

ResetUserNonceMinted Resets nonce for a specified Ethereum address

func (*BridgeClient) SignWithEthereumChain added in v1.3.5 

func (b *BridgeClient) SignWithEthereumChain(message string) ([]byte, error)

SignWithEthereumChain signs the digest with Ethereum chain signer taking key from the current user key storage

func (*BridgeClient) Swap added in v1.11.0 

func (b *BridgeClient) Swap(ctx context.Context, sourceTokenAddress string, amountSwap uint64, maxAmountSwap *big.Int, deadlinePeriod time.Time) (*types.Transaction, error)

Swap provides opportunity to perform zcntoken swap operation.

func (*BridgeClient) VerifyZCNTransaction added in v1.3.5 

func (b *BridgeClient) VerifyZCNTransaction(ctx context.Context, hash string) (transaction.Transaction, error)

VerifyZCNTransaction verifies 0CHain transaction

type BridgeSDKConfig added in v1.3.5 

type BridgeSDKConfig struct {
	LogLevel        *string
	LogPath         *string
	ConfigChainFile *string
	ConfigDir       *string
	Development     *bool
}

type DetailedAccount added in v1.11.0 

type DetailedAccount struct {
	EthereumAddress,
	PublicKey,
	PrivateKey accounts.Account
}

DetailedAccount describes detailed account

type EthereumBurnEvents added in v1.8.16 

type EthereumBurnEvents struct {
	AuthorizerID string `json:"authorizer_id,omitempty"`
	BurnEvents   []struct {
		Nonce           int64  `json:"nonce"`
		TransactionHash string `json:"transaction_hash"`
	} `json:"burn_events"`
}

EthereumBurnEvents represents burn events returned by authorizers

func (*EthereumBurnEvents) Data added in v1.8.16 

func (r *EthereumBurnEvents) Data() interface{}

func (*EthereumBurnEvents) Error added in v1.8.16 

func (r *EthereumBurnEvents) Error() error

func (*EthereumBurnEvents) GetAuthorizerID added in v1.8.16 

func (r *EthereumBurnEvents) GetAuthorizerID() string

func (*EthereumBurnEvents) SetAuthorizerID added in v1.8.16 

func (r *EthereumBurnEvents) SetAuthorizerID(id string)

type EthereumClient added in v1.11.0 

type EthereumClient interface {
	bind.ContractBackend

	ChainID(ctx context.Context) (*big.Int, error)
}

EthereumClient describes Ethereum JSON-RPC client generealized interface

type JobError 

type JobError struct {
	// contains filtered or unexported fields
}

JobError result of internal request wrapped in authorizer job

func (*JobError) MarshalJSON 

func (e *JobError) MarshalJSON() ([]byte, error)

func (*JobError) UnmarshalJSON 

func (e *JobError) UnmarshalJSON(buf []byte) error

type JobResult 

type JobResult interface {
	// Error = Status of Authorizer job on authorizer server
	Error() error
	// Data returns the actual result
	Data() interface{}
	// SetAuthorizerID Assigns authorizer ID to the Job
	SetAuthorizerID(ID string)
	// GetAuthorizerID returns authorizer ID
	GetAuthorizerID() string
}

JobResult = Authorizer task result, it wraps actual result of the query inside authorizer

type JobStatus 

type JobStatus uint

JobStatus = Ethereum transaction status

type KeyStore added in v1.11.0 

type KeyStore interface {
	Find(accounts.Account) (accounts.Account, error)
	TimedUnlock(accounts.Account, string, time.Duration) error
	SignHash(account accounts.Account, hash []byte) ([]byte, error)
	GetEthereumKeyStore() *keystore.KeyStore
}

KeyStore is a wrapper, which exposes Ethereum KeyStore methods used by DEX bridge.

func NewKeyStore added in v1.11.0 

func NewKeyStore(path string) KeyStore

NewKeyStore creates new KeyStore wrapper instance

type ProofEthereumBurn 

type ProofEthereumBurn struct {
	TxnID             string `json:"ethereum_txn_id"`
	Nonce             int64  `json:"nonce"`
	Amount            int64  `json:"amount"`
	ReceivingClientID string `json:"receiving_client_id"` // 0ZCN address
	Signature         string `json:"signature"`
}

ProofEthereumBurn Authorizer returns this type for Ethereum transaction

type ProofZCNBurn 

type ProofZCNBurn struct {
	AuthorizerID string `json:"authorizer_id,omitempty"`
	TxnID        string `json:"0chain_txn_id"`
	To           string `json:"to"`
	Nonce        int64  `json:"nonce"`
	Amount       int64  `json:"amount"`
	Signature    []byte `json:"signature"`
}

ProofZCNBurn Authorizer returns this type for ZCN transaction

func (*ProofZCNBurn) Data 

func (r *ProofZCNBurn) Data() interface{}

func (*ProofZCNBurn) Error 

func (r *ProofZCNBurn) Error() error

func (*ProofZCNBurn) GetAuthorizerID 

func (r *ProofZCNBurn) GetAuthorizerID() string

func (*ProofZCNBurn) SetAuthorizerID 

func (r *ProofZCNBurn) SetAuthorizerID(id string)

type WZCNBurnEvent 

type WZCNBurnEvent struct {
	// 	AuthorizerID Authorizer ID
	AuthorizerID string `json:"authorizer_id,omitempty"`
	// BurnTicket Returns burn ticket
	BurnTicket *ProofEthereumBurn `json:"ticket,omitempty"`
	// Err gives error of job on server side
	Err *JobError `json:"err,omitempty"`
	// Status gives job status on server side (authoriser)
	Status JobStatus `json:"status,omitempty"`
}

WZCNBurnEvent returned from burn ticket handler of: /v1/ether/burnticket/get

func (*WZCNBurnEvent) Data 

func (r *WZCNBurnEvent) Data() interface{}

func (*WZCNBurnEvent) Error 

func (r *WZCNBurnEvent) Error() error

func (*WZCNBurnEvent) GetAuthorizerID 

func (r *WZCNBurnEvent) GetAuthorizerID() string

func (*WZCNBurnEvent) SetAuthorizerID 

func (r *WZCNBurnEvent) SetAuthorizerID(id string)

Source Files

View all Source files

Directories

Path Synopsis
authorizers
bancornetwork
bancortoken
bridge
nftconfig
zcntoken
mocks

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