diff --git a/README.md b/README.md
index 9a92719..3346a9d 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,3 @@
-# This gem is under development, don't use in production
-
 # Blnk
 
 Easy way to use the blnkfinance.com API in ruby
@@ -24,10 +22,10 @@ If bundler is not being used to manage dependencies, install the gem by executin
 - [x] Find Balance
 - [x] Search Balances
 - [x] Create Transaction
-- [ ] Multiple sources / destinations Transaction
-- [ ] Refund Transaction
-- [ ] Commit inflight Transaction
-- [ ] Void inflight Transaction
+- [x] Multiple sources / destinations Transaction
+- [x] Refund Transaction
+- [x] Commit inflight Transaction
+- [x] Void inflight Transaction
 - [x] Find Transaction
 - [x] Search Transactions
 - [ ] Handler notifications
diff --git a/lib/blnk/transaction.rb b/lib/blnk/transaction.rb
index d8d3991..9004e56 100644
--- a/lib/blnk/transaction.rb
+++ b/lib/blnk/transaction.rb
@@ -9,14 +9,40 @@ class CreateContract < Dry::Validation::Contract
         required(:precision).value(:integer)
         required(:currency).value(:string)
         required(:reference).value(:string)
-        required(:source).value(:string)
-        required(:destination).value(:string)
+        optional(:source).value(:string)
+        optional(:sources).array(:hash) do
+          required(:identifier).value(:string)
+          required(:distribution).value(:string)
+          required(:narration).value(:string)
+        end
+        optional(:destination).value(:string)
+        optional(:destinations).array(:hash) do
+          required(:identifier).value(:string)
+          required(:distribution).value(:string)
+          required(:narration).value(:string)
+        end
         required(:description).value(:string)
         required(:allow_overdraft).value(:bool)
         optional(:inflight).value(:bool)
         optional(:rate).value(:integer)
         optional(:scheduled_for).value(:string)
       end
+
+      rule do
+        base.failure('must only contain one of source, sources') if key?(:source) && key?(:sources)
+
+        if key?(:destination) && key?(:destinations)
+          base.failure('must only contain one of destination, destinations')
+        end
+
+        if values[:source].to_s.empty? && values[:sources].to_s.empty?
+          key(:source).failure('missing source')
+        end
+
+        if values[:destination].to_s.empty? && values[:destinations].to_s.empty?
+          key(:destination).failure('missing destination')
+        end
+      end
     end
 
     self.resource_name = :transactions
diff --git a/test/blnk/test_transaction.rb b/test/blnk/test_transaction.rb
index 4741ccf..ea31a84 100644
--- a/test/blnk/test_transaction.rb
+++ b/test/blnk/test_transaction.rb
@@ -70,6 +70,18 @@ def stub_refund_transaction_request_with_error
     .to_return_json(body: { error: 'failed_refund_transaction' }, status: 400)
 end
 
+def stub_inflight_status_change_transaction_request_with_error(body: { status: 'commit' })
+  stub_request(:put, %r{/transactions/inflight/(.*)})
+    .with(body:)
+    .to_return_json(body: { error: 'failed' }, status: 400)
+end
+
+def stub_inflight_status_change_transaction_request_with_success(body: { status: 'commit' })
+  stub_request(:put, %r{/transactions/inflight/(.*)})
+    .with(body:)
+    .to_return_json(body: transaction_response_body, status: 200)
+end
+
 def stub_find_transaction_request_with_success
   stub_request(:get, %r{/transactions/(.*)})
     .to_return_json(body: transaction_response_body, status: 200)
@@ -96,7 +108,7 @@ def stub_all_transaction_request_with_success
     .to_return_json(body: [transaction_response_body], status: 200)
 end
 
-class TestTransaction < Minitest::Test
+class TestTransaction < Minitest::Test # rubocop:disable Metrics/ClassLength
   def test_that_transaction_not_found
     stub_find_transaction_request_with_error
     find = Blnk::Transaction.find 'transaction_id'
@@ -140,7 +152,7 @@ def test_that_transaction_create_errosr
     assert create.failure?
   end
 
-  def test_that_transaction_create_success # rubocop:disable Metric/AbcSize, Metrics/MethodLength
+  def test_that_transaction_create_success # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
     stub_create_transaction_request_with_success
 
     create = Blnk::Transaction.create(
@@ -160,7 +172,7 @@ def test_that_transaction_create_success # rubocop:disable Metric/AbcSize, Metri
     assert create.value!.name.eql?(transaction_response_body[:name])
   end
 
-  def test_that_transaction_refund_error # rubocop:disable Metric/Metrics/MethodLength
+  def test_that_transaction_refund_error # rubocop:disable Metrics/MethodLength
     stub_find_transaction_request_with_success
     stub_create_transaction_request_with_success
     stub_refund_transaction_request_with_error
@@ -181,7 +193,7 @@ def test_that_transaction_refund_error # rubocop:disable Metric/Metrics/MethodLe
     assert refund_txn.failure?
   end
 
-  def test_that_transaction_refund_success # rubocop:disable Metric/Metrics/MethodLength
+  def test_that_transaction_refund_success # rubocop:disable Metrics/MethodLength
     stub_find_transaction_request_with_success
     stub_create_transaction_request_with_success
     stub_refund_transaction_request_with_success
@@ -202,4 +214,70 @@ def test_that_transaction_refund_success # rubocop:disable Metric/Metrics/Method
     assert refund_txn.success?
     assert txn.value!.transaction_id != refund_txn.value!.transaction_id
   end
+
+  def test_that_transaction_void_error # rubocop:disable Metrics/MethodLength
+    stub_find_transaction_request_with_success
+    stub_create_transaction_request_with_success
+    stub_inflight_status_change_transaction_request_with_error(body: { status: 'void' })
+
+    txn = Blnk::Transaction.create(
+      amount: 75,
+      reference: 'ref_005',
+      currency: 'BRLX',
+      precision: 100,
+      source: '@world',
+      destination: 'bln_469f93bc-40e9-4e0e-b6ab-d11c3638c15d',
+      description: 'For fees',
+      allow_overdraft: true,
+      inflight: true
+    )
+
+    void_txn = txn.value!.void
+
+    assert void_txn.failure?
+  end
+
+  def test_that_transaction_void_success # rubocop:disable Metrics/MethodLength
+    stub_find_transaction_request_with_success
+    stub_create_transaction_request_with_success
+    stub_inflight_status_change_transaction_request_with_success(body: { status: 'void' })
+
+    txn = Blnk::Transaction.create(
+      amount: 75,
+      reference: 'ref_005',
+      currency: 'BRLX',
+      precision: 100,
+      source: '@world',
+      destination: 'bln_469f93bc-40e9-4e0e-b6ab-d11c3638c15d',
+      description: 'For fees',
+      allow_overdraft: true,
+      inflight: true
+    )
+
+    void_txn = txn.value!.void
+
+    assert void_txn.success?
+  end
+
+  def test_that_transaction_commit_error # rubocop:disable Metrics/MethodLength
+    stub_find_transaction_request_with_success
+    stub_create_transaction_request_with_success
+    stub_inflight_status_change_transaction_request_with_error(body: { status: 'commit' })
+
+    txn = Blnk::Transaction.create(
+      amount: 75,
+      reference: 'ref_005',
+      currency: 'BRLX',
+      precision: 100,
+      source: '@world',
+      destination: 'bln_469f93bc-40e9-4e0e-b6ab-d11c3638c15d',
+      description: 'For fees',
+      allow_overdraft: true,
+      inflight: true
+    )
+
+    commit_txn = txn.value!.commit
+
+    assert commit_txn.failure?
+  end
 end