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extend and fix sep-0011 implementation
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| Original file line number | Diff line number | Diff line change |
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| ### SEP-0011 - Txrep: human-readable low-level representation of Stellar transactions | ||
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| Txrep: human-readable low-level representation of Stellar transactions is described in [SEP-0011](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0011.md). | ||
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| In the following examples show how to generate Txrep from a transaction and how to create a transaction object from a Txrep string. | ||
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| FeeBumpTransaction and muxed accounts are currently not supported. | ||
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| ### Generate Txrep from transaction | ||
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| ```dart | ||
| // Prepare accounts. | ||
| KeyPair sourceKeyPair = KeyPair.random(); | ||
| String sourceAccountId = sourceKeyPair.accountId; | ||
| // Fund the source account | ||
| await FriendBot.fundTestAccount(sourceAccountId); | ||
| // Load the account data including the sequence number | ||
| AccountResponse sourceAccount = await sdk.accounts.account(sourceAccountId); | ||
| // Generate accountId for a new account to be created. | ||
| String newAccountId = KeyPair.random().accountId; | ||
| // Build the CreateAccountOperation. | ||
| Operation createAccount = new CreateAccountOperationBuilder(newAccountId, "220.09").build(); | ||
| // Add memo. | ||
| MemoText mt = MemoText("Enjoy this transaction"); | ||
| // Create the transaction. | ||
| Transaction transaction = new TransactionBuilder(sourceAccount) | ||
| .addMemo(mt) | ||
| .addOperation(createAccount) | ||
| .build(); | ||
| // Sign the transaction. | ||
| transaction.sign(sourceKeyPair, Network.TESTNET); | ||
| // Generate and print the txrep | ||
| String txrep = TxRep.toTxRep(transaction); | ||
| print(txrep); | ||
| ``` | ||
| **Result:** | ||
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| ``` | ||
| type: ENVELOPE_TYPE_TX | ||
| tx.sourceAccount: GAVVTEXNKEQ7G7XVJJ2JMBIY5WUKE73PWFVMMIW4DY7Z2E6F7NXXIVUH | ||
| tx.fee: 100 | ||
| tx.seqNum: 238563958456321 | ||
| tx.timeBounds._present: false | ||
| tx.memo.type: MEMO_TEXT | ||
| tx.memo.text: "Enjoy this transaction" | ||
| tx.operations.len: 1 | ||
| tx.operation[0].sourceAccount._present: false | ||
| tx.operation[0].body.type: CREATE_ACCOUNT | ||
| tx.operation[0].body.createAccountOp.destination: GC5ICOW2G64VZXON6DNAWPZ46TZZYV6DYEKZE42KWTBMXCVNTS3EENHC | ||
| tx.operation[0].body.createAccountOp.startingBalance: 2200900000 | ||
| tx.signatures.len: 1 | ||
| tx.signatures[0].hint: c5fb6f74 | ||
| tx.signatures[0].signature: e0611076f402005942b27807c0702e0976c14c9a9bb8bc46d1c4740060b5125da1d02c2d9ee10b58acfdaa009f57867506d188d1ee0ab3d00877db22c4101709 | ||
| tx.ext.v: 0 | ||
| ``` | ||
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| ### Create a transaction object from a Txrep string | ||
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| ```dart | ||
| String txRepString = ''' | ||
| type: ENVELOPE_TYPE_TX | ||
| tx.sourceAccount: GAVVTEXNKEQ7G7XVJJ2JMBIY5WUKE73PWFVMMIW4DY7Z2E6F7NXXIVUH | ||
| tx.fee: 100 | ||
| tx.seqNum: 238563958456321 | ||
| tx.timeBounds._present: false | ||
| tx.memo.type: MEMO_TEXT | ||
| tx.memo.text: "Enjoy this transaction" | ||
| tx.operations.len: 1 | ||
| tx.operation[0].sourceAccount._present: false | ||
| tx.operation[0].body.type: CREATE_ACCOUNT | ||
| tx.operation[0].body.createAccountOp.destination: GC5ICOW2G64VZXON6DNAWPZ46TZZYV6DYEKZE42KWTBMXCVNTS3EENHC | ||
| tx.operation[0].body.createAccountOp.startingBalance: 2200900000 | ||
| tx.signatures.len: 1 | ||
| tx.signatures[0].hint: c5fb6f74 | ||
| tx.signatures[0].signature: e0611076f402005942b27807c0702e0976c14c9a9bb8bc46d1c4740060b5125da1d02c2d9ee10b58acfdaa009f57867506d188d1ee0ab3d00877db22c4101709 | ||
| tx.ext.v: 0'''; | ||
| // Create a transaction object by parsing the txRepString. | ||
| Transaction tx = TxRep.fromTxRep(txRepString); | ||
| print(tx.sourceAccount.accountId); | ||
| // GAVVTEXNKEQ7G7XVJJ2JMBIY5WUKE73PWFVMMIW4DY7Z2E6F7NXXIVUH | ||
| print(tx.fee); | ||
| // 100 | ||
| print(tx.sequenceNumber); | ||
| // 238563958456321 | ||
| print(tx.operations.length); | ||
| // 1 | ||
| ``` |
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