Go SDK For DNA

• Go SDK For DNA
  • 1. Overview
  • 2. How to use?
    • 2.1 Block Chain API
      • 2.1.1 Get current block height
      • 2.1.2 Get current block hash
      • 2.1.3 Get block by height
      • 2.1.4 Get block by hash
      • 2.1.5 Get transaction by transaction hash
      • 2.1.6 Get block hash by block height
      • 2.1.7 Get block height by transaction hash
      • 2.1.8 Get transaction hashes of block by block height
      • 2.1.9 Get storage value of smart contract key
      • 2.1.10 Get smart contract by contract address
      • 2.1.11 Get smart contract event by transaction hash
      • 2.1.12 Get all of smart contract events of block by block height
      • 2.1.13 Get block merkle proof by transaction hash
      • 2.1.14 Get transaction state of transaction pool
      • 2.1.15 Get transaction count in transaction pool
      • 2.1.16 Get version of DNA
      • 2.1.17 Get network id of DNA
      • 2.1.18 Send transaction to DNA
      • 2.19 Prepare execute transaction
    • 2.2 Wallet API
      • 2.2.1 Create or Open Wallet
      • 2.2.2 Save Wallet
      • 2.2.3 New account
      • 2.2.4 New default setting account
      • 2.2.5 New account from wif private key
      • 2.2.5 Delete account
      • 2.2.5 Get default account
      • 2.2.6 Set default account
      • 2.2.7 Get account by address
      • 2.2.8 Get account by label
      • 2.2.9 Get account by index
      • 2.2.10 Get account count of wallet
      • 2.2.11 Get default account data
      • 2.2.12 Get account data by address
      • 2.2.13 Get account data by label
      • 2.2.14 Get account data by index
      • 2.2.15 Set account label
      • 2.2.16 Set signature scheme of account
      • 2.2.17 Change account password
      • 2.2.18 Import account to wallet
      • 2.2.19 Export account to a new wallet
    • 2.3 GAS Contract API
      • 2.3.1 Get balance
      • 2.3.2 Transfer
      • 2.3.3 Multiple Transfer
      • 2.3.4 Approve
      • 2.3.5 Approve Balance
      • 2.3.6 TransferFrom
• Contributing
  • Website
  • License

1. Overview

This is a comprehensive Go library for the DNA blockchain. Currently, it supports local wallet management, digital asset management, deployment/invoking of smart contracts and communication with the DNA Blockchain. In the future it will also support more rich functions and applications.

2. How to use?

First, create an DNASDK instance with the NewDNASdk method.

sdk := NewDNASdk()

Next, create an rpc, rest or websocket client.

sdk.NewRpcClient().SetAddress("http://localhost:20336")

Then, call the rpc server through the sdk instance.

2.1 Block Chain API

2.1.1 Get current block height

sdk.GetCurrentBlockHeight() (uint32, error)

2.1.2 Get current block hash

sdk.GetCurrentBlockHash() (common.Uint256, error)

2.1.3 Get block by height

sdk.GetBlockByHeight(height uint32) (*types.Block, error)

2.1.4 Get block by hash

sdk.GetBlockByHash(blockHash string) (*types.Block, error)

2.1.5 Get transaction by transaction hash

sdk.GetTransaction(txHash string) (*types.Transaction, error)

2.1.6 Get block hash by block height

sdk.GetBlockHash(height uint32) (common.Uint256, error)

2.1.7 Get block height by transaction hash

sdk.GetBlockHeightByTxHash(txHash string) (uint32, error)

2.1.8 Get transaction hashes of block by block height

sdk.GetBlockTxHashesByHeight(height uint32) (*sdkcom.BlockTxHashes, error)

2.1.9 Get storage value of smart contract key

sdk.GetStorage(contractAddress string, key []byte) ([]byte, error)

2.1.10 Get smart contract by contract address

sdk.GetSmartContract(contractAddress string) (*sdkcom.SmartContract, error)

2.1.11 Get smart contract event by transaction hash

sdk.GetSmartContractEvent(txHash string) (*sdkcom.SmartContactEvent, error)

2.1.12 Get all of smart contract events of block by block height

sdk.GetSmartContractEventByHeight(height uint32) ([]*sdkcom.SmartContactEvent, error)

2.1.13 Get block merkle proof by transaction hash

sdk.GetMerkleProof(txHash string) (*sdkcom.MerkleProof, error)

2.1.14 Get transaction state of transaction pool

sdk.GetMemPoolTxState(txHash string) (*sdkcom.MemPoolTxState, error)

2.1.15 Get transaction count in transaction pool

sdk.GetMemPoolTxCount() (*sdkcom.MemPoolTxCount, error)

2.1.16 Get version

sdk.GetVersion() (string, error)

2.1.17 Get network id

sdk.GetNetworkId() (uint32, error)

2.1.18 Send transaction

sdk.SendTransaction(mutTx *types.MutableTransaction) (common.Uint256, error)

2.19 Prepare execute transaction

sdk.PreExecTransaction(mutTx *types.MutableTransaction) (*sdkcom.PreExecResult, error)

2.2 Wallet API

2.2.1 Create or Open Wallet

wa, err := OpenWallet(path string) (*Wallet, error)

If the path is for an existing wallet file, then open the wallet, otherwise return error.

2.2.2 Save Wallet

wa.Save() error

Note that any modifications of the wallet require calling Save() in order for the changes to persist.

2.2.3 New account

wa.NewAccount(keyType keypair.KeyType, curveCode byte, sigScheme s.SignatureScheme, passwd []byte) (*Account, error)

DNA blockchain supports three type of keys: ecdsa, sm2 and ed25519, and support 224, 256, 384, 521 bits length of key in ecdsa, but only support 256 bits length of key in sm2 and ed25519.

DNA blockchain supports multiple signature scheme.

For ECDSA support SHA224withECDSA, SHA256withECDSA, SHA384withECDSA, SHA512withEdDSA, SHA3-224withECDSA, SHA3-256withECDSA, SHA3-384withECDSA, SHA3-512withECDSA, RIPEMD160withECDSA;

For SM2 support SM3withSM2, and for SHA512withEdDSA.

2.2.4 New default setting account

wa.NewDefaultSettingAccount(passwd []byte) (*Account, error)

The default settings for an account uses ECDSA with SHA256withECDSA as signature scheme.

2.2.5 New account from wif private key

wa.NewAccountFromWIF(wif, passwd []byte) (*Account, error)

2.2.5 Delete account

wa.DeleteAccount(address string) error

2.2.5 Get default account

wa.GetDefaultAccount(passwd []byte) (*Account, error)

2.2.6 Set default account

wa.SetDefaultAccount(address string) error

2.2.7 Get account by address

wa.GetAccountByAddress(address string, passwd []byte) (*Account, error)

2.2.8 Get account by label

wa.GetAccountByLabel(label string, passwd []byte) (*Account, error)

2.2.9 Get account by index

wa.GetAccountByIndex(index int, passwd []byte) (*Account, error)

Note that indexes start from 1.

2.2.10 Get account count of wallet

wa.GetAccountCount() int

2.2.11 Get default account data

wa.GetDefaultAccountData() (*AccountData, error)

2.2.12 Get account data by address

wa.GetAccountDataByAddress(address string) (*AccountData, error)

2.2.13 Get account data by label

wa.GetAccountDataByLabel(label string) (*AccountData, error)

2.2.14 Get account data by index

wa.GetAccountDataByIndex(index int) (*AccountData, error)

Note that indexes start from 1.

2.2.15 Set account label

wa.SetLabel(address, newLabel string) error

Note that label cannot duplicate.

2.2.16 Set signature scheme of account

wa.SetSigScheme(address string, sigScheme s.SignatureScheme) error

2.2.17 Change account password

wa.ChangeAccountPassword(address string, oldPassword, newPassword []byte) error

2.2.18 Import account to wallet

wa.ImportAccounts(accountDatas []*AccountData, passwds [][]byte) error

2.2.19 Export account to a new wallet

wa.ExportAccounts(path string, accountDatas []*AccountData, passwds [][]byte, newScrypts ...*keypair.ScryptParam) (*Wallet, error)

2.3 GAS Contract API

2.3.1 Get balance

sdk.Native.Gas.BalanceOf(address common.Address) (uint64, error)

2.3.2 Transfer

sdk.Native.Gas.Transfer(gasPrice, gasLimit uint64, from *Account, to common.Address, amount uint64) (common.Uint256, error)

2.3.3 Multiple Transfer

sdk.Native.Gas.MultiTransfer(gasPrice, gasLimit uint64, states []*gas.State, signer *Account) (common.Uint256, error)

A multi transfer does more than one transfer of ONT in one transaction.

2.3.4 Approve

sdk.Native.Gas.Approve(gasPrice, gasLimit uint64, from *Account, to common.Address, amount uint64) (common.Uint256, error)

2.3.5 Approve Balance

sdk.Native.Gas.Allowance(from, to common.Address) (uint64, error)

2.3.6 TransferFrom

sdk.Native.Gas.TransferFrom(gasPrice, gasLimit uint64, sender *Account, from, to common.Address, amount uint64) (common.Uint256, error)

Contributing

Can I contribute patches to the DNA project?

Yes! We appreciate your help!

Please open a pull request with signed-off commits. This means adding a line that says "Signed-off-by: Name " at the end of each commit, indicating that you wrote the code and have the right to pass it on as an open source patch. If you don't sign off your patches, we will not accept them.

You can also send your patches as emails to the developer mailing list. Please join the DNA mailing list or forum and talk to us about it.

Also, please write good git commit messages. A good commit message looks like this:

Header line: explain the commit in one line

The body of the commit message should be a few lines of text, explaining things in more detail, possibly giving some background about the issue being fixed, etc.

The body of the commit message can be several paragraphs long, and should use proper word-wrapping and keep the columns shorter than about 74 characters or so. That way "git log" will show things nicely even when it's indented.

Make sure you explain your solution and why you're doing what you're doing, and not just what you're doing. Reviewers (and your future self) can read the patch, but might not understand why a particular solution was implemented.

Reported-by: whoever-reported-it Signed-off-by: Your Name youremail@yourhost.com

Website

• https://dna.io/

License

The DNA library (i.e. all of the code outside of the cmd directory) is licensed under the GNU Lesser General Public License v3.0, also included in our repository in the License file.