Add multisignature support

docs/src/combine.md.ejs

@@ -0,0 +1,24 @@
+## combine
+
+`combine(signedTransactions: Array<string>): {signedTransaction: string, id: string}`
+
+Combines signed transactions from multiple accounts for a multisignature transaction. The signed transaction must subsequently be [submitted](#submit).
+
+### Parameters
+
+<%- renderSchema("input/combine.json") %>
+
+### Return Value
+
+This method returns an object with the following structure:
+
+<%- renderSchema("output/sign.json") %>
+
+### Example
+
+```javascript
+const signedTransactions = <%- importFile('test/fixtures/requests/combine.json') %>;
+return api.combine(signedTransactions);
+```
+
+<%- renderFixture("responses/combine.json") %>

docs/src/index.md.ejs

@@ -31,6 +31,7 @@
 <% include prepareSuspendedPaymentCancellation.md.ejs %>
 <% include prepareSuspendedPaymentExecution.md.ejs %>
 <% include sign.md.ejs %>
+<% include combine.md.ejs %>
 <% include submit.md.ejs %>
 <% include generateAddress.md.ejs %>
 <% include computeLedgerHash.md.ejs %>

docs/src/sign.md.ejs

@@ -1,6 +1,6 @@
 ## sign
 
-`sign(txJSON: string, secret: string): {signedTransaction: string, id: string}`
+`sign(txJSON: string, secret: string, options: Object): {signedTransaction: string, id: string}`
 
 Sign a prepared transaction. The signed transaction must subsequently be [submitted](#submit).
 

docs/src/transactions.md.ejs

@@ -30,7 +30,7 @@ Executing a transaction with `RippleAPI` requires the following four steps:
     * [prepareSuspendedPaymentCreation](#preparesuspendedpaymentcreation)
     * [prepareSuspendedPaymentCancellation](#preparesuspendedpaymentcancellation)
     * [prepareSuspendedPaymentExecution](#preparesuspendedpaymentexecution)
-2. [Sign](#sign) - Cryptographically sign the transaction locally and save the [transaction ID](#transaction-id). Signing is how the owner of an account authorizes a transaction to take place.
+2. [Sign](#sign) - Cryptographically sign the transaction locally and save the [transaction ID](#transaction-id). Signing is how the owner of an account authorizes a transaction to take place. For multisignature transactions, the `signedTransaction` fields returned by `sign` must be collected and passed to the [combine](#combine) method.
 3. [Submit](#submit) - Submit the transaction to the connected server.
 4. Verify - Verify that the transaction got validated by querying with [getTransaction](#gettransaction). This is necessary because transactions may fail even if they were successfully submitted.