diff --git a/CHANGELOG.md b/CHANGELOG.md
index d475ed4..2cc3dae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.19.0 (31.01.2024)
+
+- Support `diagnostic_events_xdr` field in `SendTransactionResponse` struct. See [stellar_sdk#350](https://github.com/kommitters/stellar_sdk/issues/350).
+
 ## 0.18.0 (20.12.2023)
 
 - [Stellar Protocol 20 support](https://github.com/kommitters/soroban.ex/issues/140).
diff --git a/README.md b/README.md
index 149a3d0..e26cdb3 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@
 ```elixir
 def deps do
   [
-    {:soroban, "~> 0.18.0"}
+    {:soroban, "~> 0.19.0"}
   ]
 end
 ```
@@ -270,7 +270,8 @@ Soroban.RPC.send_transaction(base64_envelope)
    hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1683150612",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
  }}
 ```
 
@@ -517,7 +518,8 @@ Contract.invoke(contract_address, source_secret_key, function_name, function_arg
     hash: "f62cb9e20c6d297316f49dca2041be4bf1af6b069c784764e51ac008b313d716",
     latest_ledger: 45075181,
     latest_ledger_close_time: "1683643419",
-    error_result_xdr: nil
+    error_result_xdr: nil,
+    diagnostic_events_xdr: nil
   }}
 ```
 
@@ -549,7 +551,8 @@ Contract.invoke(contract_address, source_secret_key, function_name, function_arg
       hash: "e888193b4fed9b3ca6ad2beca3c1ed5bef3e0099e558756de85d03511cbaa00b",
       latest_ledger: 45075181,
       latest_ledger_close_time: "1683643728",
-      error_result_xdr: nil
+      error_result_xdr: nil,
+      diagnostic_events_xdr: nil
     }}
   ```
 
@@ -597,7 +600,8 @@ Contract.invoke(contract_address, source_secret_key, function_name, function_arg
       hash: "da263f59a8f8b29f415e7e26758cad6e8d88caec875112641b88757ce8e01873",
       latest_ledger: 45075181,
       latest_ledger_close_time: "1683644240",
-      error_result_xdr: nil
+      error_result_xdr: nil,
+      diagnostic_events_xdr: nil
     }}
   ```
 
@@ -630,7 +634,8 @@ addl_resources = [cpu_instructions: 100]
     hash: "65d...",
     latest_ledger: 45075181,
     latest_ledger_close_time: "16",
-    error_result_xdr: nil
+    error_result_xdr: nil,
+    diagnostic_events_xdr: nil
   }}
 
 ```
@@ -661,7 +666,8 @@ addl_resources = [cpu_instructions: 100]
     hash: "f95...",
     latest_ledger: 45075181,
     latest_ledger_close_time: "16",
-    error_result_xdr: nil
+    error_result_xdr: nil,
+    diagnostic_events_xdr: nil
   }}
 
 ```
@@ -694,7 +700,8 @@ addl_resources = [cpu_instructions: 100]
   hash: "b667...",
   latest_ledger: 45075181,
   latest_ledger_close_time: "16",
-  error_result_xdr: nil
+  error_result_xdr: nil,
+  diagnostic_events_xdr: nil
 }}
 
 ```
@@ -731,7 +738,8 @@ addl_resources = [cpu_instructions: 100]
    hash: "2f6f...",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1691441432",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
 }}
 
 ```
@@ -766,7 +774,8 @@ addl_resources = [cpu_instructions: 100]
    hash: "2f6f...",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1691441432",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
 }}
 
 ```
@@ -805,7 +814,8 @@ addl_resources = [cpu_instructions: 100]
    hash: "2f6f...",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1691441432",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
 }}
 
 ```
@@ -840,7 +850,8 @@ addl_resources = [cpu_instructions: 100]
    hash: "eedb...",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1691523150",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
  }}
 
 ```
@@ -874,7 +885,8 @@ addl_resources = [cpu_instructions: 100]
    hash: "eedb...",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1691523689",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
  }}
 
 ```
@@ -913,7 +925,8 @@ addl_resources = [cpu_instructions: 100]
    hash: "0521...",
    latest_ledger: 45075181,
    latest_ledger_close_time: "1691524532",
-   error_result_xdr: nil
+   error_result_xdr: nil,
+   diagnostic_events_xdr: nil
  }}
 
 ```
diff --git a/lib/rpc/responses/send_transaction_response.ex b/lib/rpc/responses/send_transaction_response.ex
index f11b409..ebc11c2 100644
--- a/lib/rpc/responses/send_transaction_response.ex
+++ b/lib/rpc/responses/send_transaction_response.ex
@@ -5,19 +5,28 @@ defmodule Soroban.RPC.SendTransactionResponse do
   @behaviour Soroban.RPC.Response.Spec
 
   @type status :: String.t()
-  @type hash :: binary()
+  @type hash :: String.t()
   @type latest_ledger :: non_neg_integer()
   @type latest_ledger_close_time :: String.t()
   @type error_result_xdr :: String.t() | nil
+  @type diagnostic_events_xdr :: list(String.t()) | nil
   @type t :: %__MODULE__{
           status: status(),
           hash: hash(),
           latest_ledger: latest_ledger(),
           latest_ledger_close_time: latest_ledger_close_time(),
-          error_result_xdr: error_result_xdr()
+          error_result_xdr: error_result_xdr(),
+          diagnostic_events_xdr: diagnostic_events_xdr()
         }
 
-  defstruct [:status, :hash, :latest_ledger, :latest_ledger_close_time, :error_result_xdr]
+  defstruct [
+    :status,
+    :hash,
+    :latest_ledger,
+    :latest_ledger_close_time,
+    :error_result_xdr,
+    :diagnostic_events_xdr
+  ]
 
   @impl true
   def new(attrs), do: struct(%__MODULE__{}, attrs)
diff --git a/mix.exs b/mix.exs
index 15360d4..44324ae 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule Soroban.MixProject do
   use Mix.Project
 
-  @version "0.18.0"
+  @version "0.19.0"
   @github_url "https://github.com/kommitters/soroban.ex"
 
   def project do
diff --git a/mix.lock b/mix.lock
index 70b57b0..0540534 100644
--- a/mix.lock
+++ b/mix.lock
@@ -24,7 +24,7 @@
   "nimble_parsec": {:hex, :nimble_parsec, "1.3.1", "2c54013ecf170e249e9291ed0a62e5832f70a476c61da16f6aac6dca0189f2af", [:mix], [], "hexpm", "2682e3c0b2eb58d90c6375fc0cc30bc7be06f365bf72608804fb9cffa5e1b167"},
   "parse_trans": {:hex, :parse_trans, "3.4.1", "6e6aa8167cb44cc8f39441d05193be6e6f4e7c2946cb2759f015f8c56b76e5ff", [:rebar3], [], "hexpm", "620a406ce75dada827b82e453c19cf06776be266f5a67cff34e1ef2cbb60e49a"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "stellar_base": {:git, "https://github.com/kommitters/stellar_base.git", "849841e65575201643d587014752326374494d76", [branch: "v0.15"]},
-  "stellar_sdk": {:git, "https://github.com/kommitters/stellar_sdk.git", "ba664bc526d3112ef7354685a9e6a9e6a0a0fe87", [branch: "v0.20"]},
+  "stellar_base": {:hex, :stellar_base, "0.15.0", "893b7ee194aa0c732fbc16be431418d8269dc0221b70ecdb6320705540ba395f", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: false]}, {:crc, "~> 0.10.0", [hex: :crc, repo: "hexpm", optional: false]}, {:elixir_xdr, "~> 0.3", [hex: :elixir_xdr, repo: "hexpm", optional: false]}], "hexpm", "411aba27c89c03ac237457c171740428aef6f958aeebb4811723436e9105dc60"},
+  "stellar_sdk": {:hex, :stellar_sdk, "0.20.0", "e4ff409c196414d2854702b78f656eca039a7ef98a440c60f6106e58040d9f0f", [:mix], [{:ed25519, "~> 1.3", [hex: :ed25519, repo: "hexpm", optional: false]}, {:hackney, "~> 1.17", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:stellar_base, "~> 0.15", [hex: :stellar_base, repo: "hexpm", optional: false]}], "hexpm", "66860556aa621d112676e0204a52e04b0a7eb1c6416065da24b95fe05aab2991"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.7.0", "bc84380c9ab48177092f43ac89e4dfa2c6d62b40b8bd132b1059ecc7232f9a78", [:rebar3], [], "hexpm", "25eee6d67df61960cf6a794239566599b09e17e668d3700247bc498638152521"},
 }
diff --git a/test/contract/deploy_asset_contract_test.exs b/test/contract/deploy_asset_contract_test.exs
index 77140a6..eda7130 100644
--- a/test/contract/deploy_asset_contract_test.exs
+++ b/test/contract/deploy_asset_contract_test.exs
@@ -107,7 +107,8 @@ defmodule Soroban.Contract.DeployAssetContractTest do
        hash: "308f5f3c7b2c0a690e7e19b6d14c22af87763f5ae483d6d1af43b9639732d206",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683814245",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} = DeployAssetContract.deploy(asset_code, source_public, source_secret)
   end
 
@@ -122,7 +123,8 @@ defmodule Soroban.Contract.DeployAssetContractTest do
        hash: "308f5f3c7b2c0a690e7e19b6d14c22af87763f5ae483d6d1af43b9639732d206",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683814245",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} = DeployAssetContract.deploy(asset_code, asset_issuer, source_secret)
   end
 
diff --git a/test/contract/deploy_contract_test.exs b/test/contract/deploy_contract_test.exs
index ecf94fe..c84d6f3 100644
--- a/test/contract/deploy_contract_test.exs
+++ b/test/contract/deploy_contract_test.exs
@@ -114,7 +114,8 @@ defmodule Soroban.Contract.DeployContractTest do
        hash: "308f5f3c7b2c0a690e7e19b6d14c22af87763f5ae483d6d1af43b9639732d206",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683814245",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} = DeployContract.deploy(wasm_id, source_secret)
   end
 
diff --git a/test/contract/extend_footprint_ttl_test.exs b/test/contract/extend_footprint_ttl_test.exs
index 21b0f78..1b58a75 100644
--- a/test/contract/extend_footprint_ttl_test.exs
+++ b/test/contract/extend_footprint_ttl_test.exs
@@ -160,7 +160,8 @@ defmodule Soroban.Contract.ExtendFootprintTTLTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       ExtendFootprintTTL.extend_contract(
         contract_address,
@@ -192,7 +193,8 @@ defmodule Soroban.Contract.ExtendFootprintTTLTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       ExtendFootprintTTL.extend_contract_wasm(
         wasm_id,
@@ -213,7 +215,8 @@ defmodule Soroban.Contract.ExtendFootprintTTLTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       ExtendFootprintTTL.extend_contract_keys(
         contract_address,
diff --git a/test/contract/invoke_contract_function_test.exs b/test/contract/invoke_contract_function_test.exs
index f8d61c1..da5f4af 100644
--- a/test/contract/invoke_contract_function_test.exs
+++ b/test/contract/invoke_contract_function_test.exs
@@ -327,7 +327,8 @@ defmodule Soroban.Contract.InvokeContractFunctionTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       InvokeContractFunction.invoke(
         contract_address,
@@ -349,7 +350,8 @@ defmodule Soroban.Contract.InvokeContractFunctionTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       InvokeContractFunction.invoke(
         contract_address,
@@ -373,7 +375,8 @@ defmodule Soroban.Contract.InvokeContractFunctionTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       InvokeContractFunction.invoke(
         contract_address,
diff --git a/test/contract/restore_footprint_test.exs b/test/contract/restore_footprint_test.exs
index bca18ac..7e3bdad 100644
--- a/test/contract/restore_footprint_test.exs
+++ b/test/contract/restore_footprint_test.exs
@@ -157,7 +157,8 @@ defmodule Soroban.Contract.RestoreFootprintTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       RestoreFootprint.restore_contract(
         contract_address,
@@ -175,7 +176,8 @@ defmodule Soroban.Contract.RestoreFootprintTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       RestoreFootprint.restore_contract_wasm(
         wasm_id,
@@ -193,7 +195,8 @@ defmodule Soroban.Contract.RestoreFootprintTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       RestoreFootprint.restore_contract_keys(
         contract_address,
diff --git a/test/contract/upload_contract_code_test.exs b/test/contract/upload_contract_code_test.exs
index 4d73cde..ed30ac5 100644
--- a/test/contract/upload_contract_code_test.exs
+++ b/test/contract/upload_contract_code_test.exs
@@ -140,7 +140,8 @@ defmodule Soroban.Contract.UploadContractCodeTest do
        hash: "308f5f3c7b2c0a690e7e19b6d14c22af87763f5ae483d6d1af43b9639732d206",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683814245",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} = UploadContractCode.upload(wasm, source_secret)
   end
 
diff --git a/test/contract_test.exs b/test/contract_test.exs
index aeadb97..fc46097 100644
--- a/test/contract_test.exs
+++ b/test/contract_test.exs
@@ -228,7 +228,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.invoke(
         contract_address,
@@ -249,7 +250,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.invoke(
         contract_address,
@@ -272,7 +274,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.invoke(
         contract_address,
@@ -297,7 +300,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.invoke(
         contract_address,
@@ -344,7 +348,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.upload(
         wasm,
@@ -362,7 +367,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.deploy(
         wasm_id,
@@ -381,7 +387,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.deploy_asset(
         asset_code,
@@ -401,7 +408,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.extend_contract(
         contract_address,
@@ -421,7 +429,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.extend_contract_wasm(
         extend_wasm_id,
@@ -442,7 +451,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.extend_contract_keys(
         contract_address,
@@ -462,7 +472,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.restore_contract(
         contract_address,
@@ -480,7 +491,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.restore_contract_wasm(
         extend_wasm_id,
@@ -498,7 +510,8 @@ defmodule Soroban.ContractTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} =
       Contract.restore_contract_keys(
         contract_address,
diff --git a/test/rpc/endpoints/send_transaction_test.exs b/test/rpc/endpoints/send_transaction_test.exs
index 07e6d4c..efa4887 100644
--- a/test/rpc/endpoints/send_transaction_test.exs
+++ b/test/rpc/endpoints/send_transaction_test.exs
@@ -46,7 +46,8 @@ defmodule Soroban.RPC.SendTransactionTest do
        hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
        latest_ledger: 45_075_181,
        latest_ledger_close_time: "1683150612",
-       error_result_xdr: nil
+       error_result_xdr: nil,
+       diagnostic_events_xdr: nil
      }} = SendTransaction.request(transaction_xdr)
   end
 end
diff --git a/test/rpc/responses/send_transaction_response_test.exs b/test/rpc/responses/send_transaction_response_test.exs
index 2849ea5..8bf5d15 100644
--- a/test/rpc/responses/send_transaction_response_test.exs
+++ b/test/rpc/responses/send_transaction_response_test.exs
@@ -4,55 +4,71 @@ defmodule Soroban.RPC.SendTransactionResponseTest do
   alias Soroban.RPC.SendTransactionResponse
 
   setup do
-    result = %{
+    pending_response = %{
       hash: "d70916f8b8aa55c13d5974a38e32a3efe440ef6870c0f0a07075d1c128d23698",
-      status: :pending,
+      status: "PENDING",
       latest_ledger: 45_075_181,
-      latest_ledger_close_time: "1677115742"
+      latest_ledger_close_time: "1677115742",
+      error_result_xdr: nil,
+      diagnostic_events_xdr: nil
+    }
+
+    error_response = %{
+      pending_response
+      | status: "ERROR",
+        error_result_xdr: "AAAAAAAAAGT////7AAAAAA==",
+        diagnostic_events_xdr: [
+          "AAAAAQAAAAAAAAAAAAAAAgAAAAAAAAADAAAADwAAAAdmbl9jYWxsAAAAAA0AAAAgr/p6gt6h8MrmSw+WNJnu3+sCP9dHXx7jR8IH0sG6Cy0AAAAPAAAABWhlbGxvAAAAAAAADwAAAAVBbG9oYQAAAA=="
+        ]
     }
 
     %{
-      result: result,
-      error_result:
-        Map.merge(result, %{status: :error, error_result_xdr: "AAAAAAAAAGT////7AAAAAA=="})
+      pending_response: pending_response,
+      error_response: error_response
     }
   end
 
   describe "new/1" do
-    test "when successful response", %{
-      result:
+    test "when pending response", %{
+      pending_response:
         %{
           hash: hash,
           status: status,
           latest_ledger: latest_ledger,
-          latest_ledger_close_time: latest_ledger_close_time
-        } = result
+          latest_ledger_close_time: latest_ledger_close_time,
+          error_result_xdr: error_result_xdr,
+          diagnostic_events_xdr: diagnostic_events_xdr
+        } = pending_response
     } do
       %SendTransactionResponse{
         hash: ^hash,
         status: ^status,
         latest_ledger: ^latest_ledger,
-        latest_ledger_close_time: ^latest_ledger_close_time
-      } = SendTransactionResponse.new(result)
+        latest_ledger_close_time: ^latest_ledger_close_time,
+        error_result_xdr: ^error_result_xdr,
+        diagnostic_events_xdr: ^diagnostic_events_xdr
+      } = SendTransactionResponse.new(pending_response)
     end
 
     test "when error response", %{
-      error_result:
+      error_response:
         %{
           hash: hash,
           status: status,
           latest_ledger: latest_ledger,
           latest_ledger_close_time: latest_ledger_close_time,
-          error_result_xdr: error_result_xdr
-        } = result
+          error_result_xdr: error_result_xdr,
+          diagnostic_events_xdr: diagnostic_events_xdr
+        } = error_response
     } do
       %SendTransactionResponse{
         hash: ^hash,
         status: ^status,
         latest_ledger: ^latest_ledger,
         latest_ledger_close_time: ^latest_ledger_close_time,
-        error_result_xdr: ^error_result_xdr
-      } = SendTransactionResponse.new(result)
+        error_result_xdr: ^error_result_xdr,
+        diagnostic_events_xdr: ^diagnostic_events_xdr
+      } = SendTransactionResponse.new(error_response)
     end
   end
 end
diff --git a/test/rpc_test.exs b/test/rpc_test.exs
index 3f1513d..99b98d2 100644
--- a/test/rpc_test.exs
+++ b/test/rpc_test.exs
@@ -263,7 +263,8 @@ defmodule Soroban.RPCTest do
          hash: "a4721e2a61e9a6b3f54030396e41c3e352101e6cd649b4453e89fb3e827744f4",
          latest_ledger: 45_075_181,
          latest_ledger_close_time: "1683150612",
-         error_result_xdr: nil
+         error_result_xdr: nil,
+         diagnostic_events_xdr: nil
        }} = RPC.send_transaction(base64_envelope)
     end
   end