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Checks tutorial: separate signing for CheckCreate

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This commit is contained in:
mDuo13
2018-03-21 15:14:54 -07:00
parent f335bcaa41
commit ab596fd371
12 changed files with 258 additions and 51 deletions
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.gitignore vendored
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/node_modules/
node_modules/
*~
.DS_Store
content/code_samples/*/node_modules/
__pycache__
out/
package-lock.json

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content/code_samples/checks/cli/sign-req-1.sh Normal file
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rippled sign s████████████████████████████ '{
"TransactionType": "CheckCreate",
"Account": "rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za",
"Destination": "rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis",
"SendMax": "100000000",
"Expiration": 570113521,
"InvoiceID": "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
"DestinationTag": 1,
"Fee": "12"
}'

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content/code_samples/checks/cli/sign-resp-1.txt Normal file
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Loading: "/home/mduo13/.config/ripple/rippled.cfg"
2018-Mar-21 21:00:05 HTTPClient:NFO Connecting to 127.0.0.1:5005
{
"result" : {
"status" : "success",
"tx_blob" : "120010228000000024000000012A21FB3DF12E00000001501146060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE29168400000000000000C694000000005F5E100732103B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB40074473045022100EB5A9001E14FC7304C4C2DF66507F9FC59D17FDCF98B43A4E30356658AB2A7CF02207127187EE0F287665D9552D15BEE6B00D3C6691C6773CE416E8A714B853F44FC8114735FF88E5269C80CD7F7AF10530DAB840BBF6FDF8314A8B6B9FF3246856CADC4A0106198C066EA1F9C39",
"tx_json" : {
"Account" : "rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za",
"Destination" : "rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis",
"DestinationTag" : 1,
"Expiration" : 570113521,
"Fee" : "12",
"Flags" : 2147483648,
"InvoiceID" : "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
"SendMax" : "100000000",
"Sequence" : 1,
"SigningPubKey" : "03B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB400",
"TransactionType" : "CheckCreate",
"TxnSignature" : "3045022100EB5A9001E14FC7304C4C2DF66507F9FC59D17FDCF98B43A4E30356658AB2A7CF02207127187EE0F287665D9552D15BEE6B00D3C6691C6773CE416E8A714B853F44FC",
"hash" : "07C3B2878B6941FED97BA647244531B7E2203268B05C71C3A1A014045ADDF408"
}
}
}

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content/code_samples/checks/cli/submit-create-req-1.sh Normal file
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@@ -0,0 +1 @@
rippled submit 120010228000000024000000012A21FB3DF12E00000001501146060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE29168400000000000000C694000000005F5E100732103B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB40074473045022100EB5A9001E14FC7304C4C2DF66507F9FC59D17FDCF98B43A4E30356658AB2A7CF02207127187EE0F287665D9552D15BEE6B00D3C6691C6773CE416E8A714B853F44FC8114735FF88E5269C80CD7F7AF10530DAB840BBF6FDF8314A8B6B9FF3246856CADC4A0106198C066EA1F9C39

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content/code_samples/checks/js/package.json Normal file
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{
"name": "checks-examples",
"description": "Example code for signing and submitting Checks with RippleAPI",
"version": "0.0.1",
"license": "MIT",
"dependencies": {
"ripple-lib": "^0.19.0"
}
}

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content/code_samples/checks/js/prepareCreate.js Normal file
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'use strict'
const RippleAPI = require('ripple-lib').RippleAPI
// This example connects to a public Test Net server
const api = new RippleAPI({server: 'wss://s.altnet.rippletest.net:51233'})
api.connect().then(() => {
console.log('Connected')
const sender = 'rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za'
const receiver = 'rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis'
const options = {
// Allow up to 60 ledger versions (~5 min) instead of the default 3 versions
// before this transaction fails permanently.
"maxLedgerVersionOffset": 60
}
return api.prepareCheckCreate(sender, {
"destination": receiver,
"sendMax": {
"currency": "XRP",
"value": "100" // RippleAPI uses decimal XRP, not integer drops
}
}, options)
}).then(prepared => {
console.log("txJSON:", prepared.txJSON);
// Disconnect and return
}).then(() => {
api.disconnect().then(() => {
console.log('Disconnected')
process.exit()
})
}).catch(console.error)

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content/code_samples/checks/js/sign-resp-example.txt Normal file
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tx_blob is: 12001022800000002400000001201B0075139F68400000000000000C694000000005F5E100732103B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB4007446304402204B5DA588DC2B9B9E52248129F07083AE71039CBDD8A87F58583853A4A9A8461B02205973D04A9F97EE0684DB98D4EC813CF748806019751062FB600406D8BE95D18D8114735FF88E5269C80CD7F7AF10530DAB840BBF6FDF8314A8B6B9FF3246856CADC4A0106198C066EA1F9C39
tx hash is: DC334D25AA70A4412E8EA80D3199414C5D8579DFD3F085E5AF7CE35C334F5246

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content/code_samples/checks/js/signCreate.js Normal file
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'use strict'
const RippleAPI = require('ripple-lib').RippleAPI
// Can sign offline if the txJSON has all required fields
const api = new RippleAPI()
const txJSON = '{"Account":"rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za", \
"TransactionType":"CheckCreate", \
"Destination":"rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis", \
"SendMax":"100000000", \
"Flags":2147483648, \
"LastLedgerSequence":7672735, \
"Fee":"12", \
"Sequence":1}'
// Be careful where you store your real secret.
const secret = 's████████████████████████████'
const signed = api.sign(txJSON, secret)
console.log("tx_blob is:", signed.signedTransaction)
console.log("tx hash is:", signed.id)

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content/code_samples/checks/js/submitCreate.js Normal file
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'use strict'
const RippleAPI = require('ripple-lib').RippleAPI
// This example connects to a public Test Net server
const api = new RippleAPI({server: 'wss://s.altnet.rippletest.net:51233'})
api.connect().then(() => {
console.log('Connected')
const tx_blob = "12001022800000002400000001201B0075139F68400000000000000C69"+
"4000000005F5E100732103B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E"+
"359045FF4BB4007446304402204B5DA588DC2B9B9E52248129F07083AE71039CBDD8A87F"+
"58583853A4A9A8461B02205973D04A9F97EE0684DB98D4EC813CF748806019751062FB60"+
"0406D8BE95D18D8114735FF88E5269C80CD7F7AF10530DAB840BBF6FDF8314A8B6B9FF32"+
"46856CADC4A0106198C066EA1F9C39"
return api.submit(tx_blob)
}).then(response => {
console.log("Preliminary transaction result:", response.resultCode)
// Disconnect and return
}).then(() => {
api.disconnect().then(() => {
console.log('Disconnected')
process.exit()
})
}).catch(console.error)

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content/code_samples/checks/websocket/sign-req-1.json Normal file
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{
"id": "sign_req_1",
"command": "sign",
"tx_json": {
"TransactionType": "CheckCreate",
"Account": "rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za",
"Destination": "rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis",
"SendMax": "100000000",
"Expiration": 570113521,
"InvoiceID": "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
"DestinationTag": 1,
"Fee": "12"
},
"secret" : "s████████████████████████████"
}

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content/code_samples/checks/websocket/sign-resp-1.json Normal file
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{
"id": "sign_req_1",
"result": {
"tx_blob": "120010228000000024000000012A21FB3DF12E00000001501146060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE29168400000000000000C694000000005F5E100732103B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB40074473045022100EB5A9001E14FC7304C4C2DF66507F9FC59D17FDCF98B43A4E30356658AB2A7CF02207127187EE0F287665D9552D15BEE6B00D3C6691C6773CE416E8A714B853F44FC8114735FF88E5269C80CD7F7AF10530DAB840BBF6FDF8314A8B6B9FF3246856CADC4A0106198C066EA1F9C39",
"tx_json": {
"Account": "rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za",
"Destination": "rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis",
"DestinationTag": 1,
"Expiration": 570113521,
"Fee": "12",
"Flags": 2147483648,
"InvoiceID": "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
"SendMax": "100000000",
"Sequence": 1,
"SigningPubKey": "03B6FCD7FAC4F665FE92415DD6E8450AD90F7D6B3D45A6CFCF2E359045FF4BB400",
"TransactionType": "CheckCreate",
"TxnSignature": "3045022100EB5A9001E14FC7304C4C2DF66507F9FC59D17FDCF98B43A4E30356658AB2A7CF02207127187EE0F287665D9552D15BEE6B00D3C6691C6773CE416E8A714B853F44FC",
"hash": "07C3B2878B6941FED97BA647244531B7E2203268B05C71C3A1A014045ADDF408"
}
},
"status": "success",
"type": "response"
}

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content/tutorial-checks.md
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@@ -9,33 +9,49 @@ Checks in the XRP Ledger are similar to paper personal checks. This tutorial ste
- Cashing a Check for a flexible amount
- Canceling a Check
<!--{# Accounts used in these examples:
<!--{# Accounts used in old examples:
rUn84CUYbNjRoTQ6mSW7BVJPSVJNLb1QLo snkuWqxoqt6aeykTbkEWrTMJHrWGM (as the sender)
rfkE1aSy9G8Upk4JssnwBxhEv5p4mn2KTy sn2Zh1tRZyodU9qNy9tMnQr9UbBss (as the dest.)
new examples:
rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za ssqSRChhs5qTiUzn9jYf25khmQuwL as the sender
rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis sn2DreVBky7kzbXJoaUMXMKCR8HAc as the receiver
#}-->
## Sending a Check
Sending a Check involves sending a [CheckCreate transaction][], which creates a [Check object in the ledger](reference-ledger-format.html#check). Most of the fields of a CheckCreate transaction are similar to the fields of a (push) [Payment][], because a Check is like writing permission for an intended recipient to pull a payment from you. You can create a check for XRP or an issued currency.
### Prerequisites
To send a Check with this tutorial, you need the following:
- The **address** and **secret key** of a funded account to send the Check from.
- You can use the [XRP Ledger Test Net Faucet](https://ripple.com/build/xrp-test-net/) to get a funded address and secret with 10,000 Test Net XRP.
- The **address** of a funded account to receive the Check.
- A secure way to sign transactions, such as [RippleAPI][] or your own [`rippled` server](tutorial-rippled-setup.html).
- A client library that can connect to a `rippled` server, such as [RippleAPI][] or any HTTP or WebSocket library.
- For more information, see [Connecting to `rippled`](reference-rippled.html#connecting-to-rippled).
### 1. Prepare the CheckCreate transaction
Decide how much money the Check is for and who can cash it. Figure out the values of the [CheckCreate transaction][] fields.
Decide how much money the Check is for and who can cash it. Figure out the values of the [CheckCreate transaction][] fields. The following fields are the bare minimum; everything else is either optional or can be [auto-filled](reference-transaction-format.html#auto-fillable-fields) when signing:
| Field | Value | Description |
|---|---|---|
| `TransactionType` | String | The value `CheckCreate` indicates this is a CheckCreate transaction. |
| `Account` | String (Address) | The address of the sender who is creating the Check. (In other words, your address.) |
| `Destination` | String (Address) | The address of the intended recipient who can cash the Check. |
| `SendMax` | String or Object (Amount) | The maximum amount you can be debited when this Check gets cashed. For XRP, use a string representing drops of XRP. For issued currencies, use an object with `currency`, `issuer`, and `value` fields. See [Specifying Currency Amounts][] for details. If you want the recipient to be able to cash the Check for an exact amount of a non-XRP currency with a [transfer fee](concept-transfer-fees.html), remember to include an extra percentage to pay for the transfer fee. |
| `SendMax` | String or Object (Amount) | The maximum amount the sender can be debited when this Check gets cashed. For XRP, use a string representing drops of XRP. For issued currencies, use an object with `currency`, `issuer`, and `value` fields. See [Specifying Currency Amounts][] for details. If you want the recipient to be able to cash the Check for an exact amount of a non-XRP currency with a [transfer fee](concept-transfer-fees.html), remember to include an extra percentage to pay for the transfer fee. |
For example, here is a transaction to create a Check for 100 XRP from rUn84CUYbNjRoTQ6mSW7BVJPSVJNLb1QLo to rfkE1aSy9G8Upk4JssnwBxhEv5p4mn2KTy, with an expiration time of 2018-01-24T12:52:01Z:
```
{
"TransactionType": "CheckCreate",
"Account": "rUn84CUYbNjRoTQ6mSW7BVJPSVJNLb1QLo",
"Destination": "rfkE1aSy9G8Upk4JssnwBxhEv5p4mn2KTy",
"Account": "rBXsgNkPcDN2runsvWmwxk3Lh97zdgo9za",
"Destination": "rGPnRH1EBpHeTF2QG8DCAgM7z5pb75LAis",
"SendMax": "100000000",
"Expiration": 570113521,
"InvoiceID": "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
@@ -44,79 +60,105 @@ For example, here is a transaction to create a Check for 100 XRP from rUn84CUYbN
}
```
#### Preparing CheckCreate with RippleAPI
If you are using [RippleAPI](reference-rippleapi.html), you can use the `prepareCheckCreate()` helper method. For example:
```js
{% include 'code_samples/checks/js/prepareCreate.js' %}
```
**Note:** Checks require RippleAPI version 0.19.0 or higher.
### 2. Sign the CheckCreate transaction
The most secure way to sign a transaction is to do it locally with a signing library, such as [RippleAPI](reference-rippleapi.html). Alternatively, you can sign the transaction using the [`sign`](reference-rippled.html#sign) command, but this must be done through a trusted and encrypted connection, or through a local connection, and only to a server you control.
In all cases, note the signed transaction's identifying hash for later.
#### Example Request
***TODO: Change this from submit to sign***
<!-- MULTICODE_BLOCK_START -->
*RippleAPI*
```js
{% include 'code_samples/checks/js/signCreate.js' %}
```
*WebSocket*
```json
{% include 'code_samples/checks/websocket/sign-req-1.json' %}
```
*Commandline*
```
$ ./rippled submit snkuWqxoqt6aeykTbkEWrTMJHrWGM '{ "TransactionType": "CheckCreate",
"Account": "rUn84CUYbNjRoTQ6mSW7BVJPSVJNLb1QLo",
"Destination": "rfkE1aSy9G8Upk4JssnwBxhEv5p4mn2KTy",
"SendMax": "100000000",
"Expiration": 570113521,
"InvoiceID": "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
"DestinationTag": 1,
"Fee": "12"
}'
```bash
{% include 'code_samples/checks/cli/sign-req-1.sh' %}
```
<!-- MULTICODE_BLOCK_END -->
#### Example Response
***TODO: Change this from submit to sign***
<!-- MULTICODE_BLOCK_START -->
*RippleAPI*
```js
{% include 'code_samples/checks/js/sign-resp-example.txt' %}
```
*WebSocket*
```json
{% include 'code_samples/checks/websocket/sign-resp-1.json' %}
```
*Commandline*
```
Loading: "/home/mduo13/.config/ripple/rippled.cfg"
2018-Jan-24 01:01:20 HTTPClient:NFO Connecting to 127.0.0.1:5005
{
"result" : {
"engine_result" : "tesSUCCESS",
"engine_result_code" : 0,
"engine_result_message" : "The transaction was applied. Only final in a validated ledger.",
"status" : "success",
"tx_blob" : "120010228000000024000000022A21FB3DF12E00000001501146060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE29168400000000000000C694000000005F5E1007321022C53CD19049F32F31848DD3B3BE5CEF6A2DD1EFDA7971AB3FA49B1BAF12AEF7874473045022100CC5B7069DF8133E91216F49933A685194DDB9BDCFF8241A7EF2F838993B98BEB022016DF6D746DF13AEA0D4BC867149BFEFFAF724AB0842A823A440D0EC684D876D181147990EC5D1D8DF69E070A968D4B186986FDF06ED0831449FF0C73CA6AF9733DA805F76CA2C37776B7C46B",
"tx_json" : {
"Account" : "rUn84CUYbNjRoTQ6mSW7BVJPSVJNLb1QLo",
"Destination" : "rfkE1aSy9G8Upk4JssnwBxhEv5p4mn2KTy",
"DestinationTag" : 1,
"Expiration" : 570113521,
"Fee" : "12",
"Flags" : 2147483648,
"InvoiceID" : "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
"SendMax" : "100000000",
"Sequence" : 2,
"SigningPubKey" : "022C53CD19049F32F31848DD3B3BE5CEF6A2DD1EFDA7971AB3FA49B1BAF12AEF78",
"TransactionType" : "CheckCreate",
"TxnSignature" : "3045022100CC5B7069DF8133E91216F49933A685194DDB9BDCFF8241A7EF2F838993B98BEB022016DF6D746DF13AEA0D4BC867149BFEFFAF724AB0842A823A440D0EC684D876D1",
"hash" : "5463C6E08862A1FAE5EDAC12D70ADB16546A1F674930521295BC082494B62924"
}
}
}
```json
{% include 'code_samples/checks/cli/sign-resp-1.txt' %}
```
<!-- MULTICODE_BLOCK_END -->
### 3. Submit the signed transaction
### 3. Wait for validation
Take the signed transaction blob from the previous step and submit it to a `rippled` server. You can do this safely even if you do not operate the `rippled` server. The response contains a provisional result, which should be `tesSUCCESS`, but this result is [usually not final](reference-transaction-format.html#finality-of-results).
**Tip:** If the preliminary result is `tefMAX_LEDGER`, the transaction has failed permanently because its `LastLedgerSequence` parameter is lower than the current ledger. This happens when you take longer than the expected number of ledger versions between preparing and submitting the transaction. If this occurs, [start over from step 1](#1-prepare-the-checkcreate-transaction) with a higher `LastLedgerSequence` value.
#### Example Request
<!-- MULTICODE_BLOCK_START -->
*RippleAPI*
```js
{% include 'code_samples/checks/js/submitCreate.js' %}
```
*WebSocket*
```json
{% include 'code_samples/checks/websocket/submit-create-req-1.json' %}
```
*Commandline*
```bash
{% include 'code_samples/checks/cli/submit-create-req-1.sh' %}
```
<!-- MULTICODE_BLOCK_END -->
### 4. Wait for validation
{% include 'snippets/wait-for-validation.md' %}
### 4. Confirm final result
### 5. Confirm final result
Use the [`tx` method](reference-rippled.html#tx) with the CheckCreate transaction's identifying hash to check its status. Look for a `"TransactionResult": "tesSUCCESS"` field in the transaction's metadata, indicating that the transaction succeeded, and the field `"validated": true` in the result, indicating that this result is final.
@@ -657,4 +699,5 @@ Loading: "/home/mduo13/.config/ripple/rippled.cfg"
<!--{# common links TODO change this after PR#321 #}-->
[Specifying Currency Amounts]: reference-rippled.html#specifying-currency-amounts
[RippleAPI]: reference-rippleapi.html
{% include 'snippets/tx-type-links.md' %}