docs: add docs on how to construct and broadcast transactions #11625

luca992 · 2022-04-13T04:30:34Z

I'm converting from the /txs end point to /cosmos/tx/v1beta1/txs

The documentation shows an example of a /txs post body as:

{
  "tx": {
    "msg": [
      "string"
    ],
    "fee": {
      "gas": "string",
      "amount": [
        {
          "denom": "stake",
          "amount": "50"
        }
      ]
    },
    "memo": "string",
    "signature": {
      "signature": "MEUCIQD02fsDPra8MtbRsyB1w7bqTM55Wu138zQbFcWx4+CFyAIge5WNPfKIuvzBZ69MyqHsqD8S1IwiEp+iUb6VSdtlpgY=",
      "pub_key": {
        "type": "tendermint/PubKeySecp256k1",
        "value": "Avz04VhtKJh8ACCVzlI8aTosGy0ikFXKIVHQ3jKMrosH"
      },
      "account_number": "0",
      "sequence": "0"
    }
  },
  "mode": "block"
}

but, /cosmos/tx/v1beta1/txs only shows it's example body as:

{
  "tx_bytes": "string",
  "mode": "BROADCAST_MODE_UNSPECIFIED"
}

where tx_bytes is a base64 encoded string.

But, where can I find an example of the tx_bytes json structure before encoding to base64?

Right now I am encoding the tx value from /txs which looks like:

{
    "msg": [
      "string"
    ],
    "fee": {
      "gas": "string",
      "amount": [
        {
          "denom": "stake",
          "amount": "50"
        }
      ]
    },
    "memo": "string",
    "signature": {
      "signature": "MEUCIQD02fsDPra8MtbRsyB1w7bqTM55Wu138zQbFcWx4+CFyAIge5WNPfKIuvzBZ69MyqHsqD8S1IwiEp+iUb6VSdtlpgY=",
      "pub_key": {
        "type": "tendermint/PubKeySecp256k1",
        "value": "Avz04VhtKJh8ACCVzlI8aTosGy0ikFXKIVHQ3jKMrosH"
      },
      "account_number": "0",
      "sequence": "0"
    }
  }

As base64 but I am getting the error: Code: 2; Raw log: expected 2 wire type, got 3: tx parse error

The text was updated successfully, but these errors were encountered:

luca992 · 2022-04-13T04:59:07Z

Get /cosmos/tx/v1beta1/txs/{hash} shows the response as:

{
  "tx": {
    "body": {
      "messages": [
        {
          "type_url": "string",
          "value": "string"
        }
      ],
      "memo": "string",
      "timeout_height": "string",
      "extension_options": [
        {
          "type_url": "string",
          "value": "string"
        }
      ],
      "non_critical_extension_options": [
        {
          "type_url": "string",
          "value": "string"
        }
      ]
    },
    "auth_info": {
      "signer_infos": [
        {
          "public_key": {
            "type_url": "string",
            "value": "string"
          },
          "mode_info": {
            "single": {
              "mode": "SIGN_MODE_UNSPECIFIED"
            },
            "multi": {
              "bitarray": {
                "extra_bits_stored": 0,
                "elems": "string"
              },
              "mode_infos": [
                null
              ]
            }
          },
          "sequence": "string"
        }
      ],
      "fee": {
        "amount": [
          {
            "denom": "string",
            "amount": "string"
          }
        ],
        "gas_limit": "string",
        "payer": "string",
        "granter": "string"
      }
    },
    "signatures": [
      "string"
    ]
  },
  "tx_response": {
    "height": "string",
    "txhash": "string",
    "codespace": "string",
    "code": 0,
    "data": "string",
    "raw_log": "string",
    "logs": [
      {
        "msg_index": 0,
        "log": "string",
        "events": [
          {
            "type": "string",
            "attributes": [
              {
                "key": "string",
                "value": "string"
              }
            ]
          }
        ]
      }
    ],
    "info": "string",
    "gas_wanted": "string",
    "gas_used": "string",
    "tx": {
      "type_url": "string",
      "value": "string"
    },
    "timestamp": "string"
  }
}

Does that mean the tx_bytes should look like:

{
    "body": {
      "messages": [
        {
          "type_url": "string",
          "value": "string"
        }
      ],
      "memo": "string",
      "timeout_height": "string",
      "extension_options": [
        {
          "type_url": "string",
          "value": "string"
        }
      ],
      "non_critical_extension_options": [
        {
          "type_url": "string",
          "value": "string"
        }
      ]
    },
    "auth_info": {
      "signer_infos": [
        {
          "public_key": {
            "type_url": "string",
            "value": "string"
          },
          "mode_info": {
            "single": {
              "mode": "SIGN_MODE_UNSPECIFIED"
            },
            "multi": {
              "bitarray": {
                "extra_bits_stored": 0,
                "elems": "string"
              },
              "mode_infos": [
                null
              ]
            }
          },
          "sequence": "string"
        }
      ],
      "fee": {
        "amount": [
          {
            "denom": "string",
            "amount": "string"
          }
        ],
        "gas_limit": "string",
        "payer": "string",
        "granter": "string"
      }
    },
    "signatures": [
      "string"
    ]
  }

encoded to base64?

luca992 · 2022-04-13T05:33:54Z

I see now that tx_bytes is actually the base64 encoding of a protobuf: https://docs.cosmos.network/v0.45/run-node/txs.html#broadcasting-a-transaction-3. Is there no way to post a transaction using just json anymore?

If not, is there an example of how to correctly build the protobuf for posting as a tx_bytes equivalent to the /txs post body example above?

devkhalil1337 · 2022-05-11T23:25:05Z

@marbar3778 can you please reply to this thread? I'm having the same issue

luca992 · 2022-05-12T00:11:24Z

@devkhalil1337 I don't really have time to write up how rn. But, I figured it out here: https://github.com/eqoty-labs/secretk/blob/7b0e3f222a82afa09db9b922c334badf9978801c/src/commonMain/kotlin/io/eqoty/client/SigningCosmWasmClient.kt#L126

if you step through my code you can see how I'm building it.

Or if js is easier. I figured it out based on the secret.js code: https://github.com/scrtlabs/secret.js/blob/164eed6f93c419ca7522a3605dc617a7f745b44f/src/secret_network_client.ts#L1049

But, I agree some documentation would be really helpful.

devkhalil1337 · 2022-05-12T21:01:04Z

thanks for the reply @luca992 I tried but unable to understand I'd appreciate if you can share the exact payload here for the new endpoint

this is the payload I am using

{
	"tx": {
		"msg": [{
			"type": "cosmos-sdk/MsgSend",
			"value": {
				"from_address": "cosmos1k0k9jlj9hgduk5xn2nrgrygv7900hptk2xnr8w",
				"to_address": "cosmos1mkljjemr94rza337l3uqmntz7tqnrm3lntarf6",
				"amount": [{
					"denom": "uatom",
					"amount": "1041100"
				}]
			}
		}],
		"fee": {
			"gas": "74117",
			"amount": [{
				"denom": "uatom",
				"amount": "1000"
			}]
		},
		"memo": "",
		"signatures": [{
			"signature": "rJdMEOzd5lNI9dRbURSuxOOzs2KaJUzDuA3ZHT6rACtzvHsGZ0maTHQkfGYAzZNcv03tUBYAQjS7/Lu343DkvQ==",
			"pub_key": {
				"type": "tendermint/PubKeySecp256k1",
				"value": "AuffQiSZzkY2ulXITteOfEMVPvc4h4cZHQq0YsT5qyjS"
			},
			"account_number": "62932",
			"sequence": "2"
		}]
	},
	"mode": "sync"
}

then encoding to base64 like this
Buffer.from(JSON.stringify(payload), 'hex').toString('base64')

Final Payload:

{
"tx_bytes": "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",
"mode": "BROADCAST_MODE_SYNC"
}

response:

{ "tx_response": { "height": "0", "txhash": "7B234A905431A84562AC29A0F8418BD986783CEAE960C76E53D8D0178C7A7851", "codespace": "sdk", "code": 2, "data": "", "raw_log": "expected 2 wire type, got 3: tx parse error", "logs": [], "info": "", "gas_wanted": "0", "gas_used": "0", "tx": null, "timestamp": "", "events": [] } }

luca992 · 2022-05-13T18:03:44Z

first your actual payload should look like:

pseudo-code

// txBytes is the encoded bytearray of a protobuf
val txString = txBytes.toByteString().base64()
val params = {
                "tx_bytes": "$txString",
                "mode": "BROADCAST_MODE_SYNC"
             }

luca992 · 2022-05-13T18:26:03Z

to build txBytes. I am encoding a protobuffer to a byte array with the structure pictured above. And each of those also contained encoded byte arrays for other protobuffers... basically each probuf class required as parameter of a another protobuf class needs to be encoded to a byte array.

So, bodyBytes and authInfoBytes are protobuffer objects which were previously encoded to byte arrays here for example

The the TxRaw probuf is defined here:

cosmos-sdk/proto/cosmos/tx/v1beta1/tx.proto

Line 33 in 16c8e27

message TxRaw {

Sorry, probably not the best explanation. But maybe will get you headed in the right direction. You are probably going to have to read up on how protobufs work if you haven't used them before. I definitely had to haha

devkhalil1337 · 2022-05-13T20:03:07Z

@luca992 thanks for the explanation I get the final payload just one more thing, I am working in javascript and is this JSON object is fine before converting it to the byteArray and base64

{
	"tx": {
		"msg": [{
			"type": "cosmos-sdk/MsgSend",
			"value": {
				"from_address": "cosmos1k0k9jlj9hgduk5xn2nrgrygv7900hptk2xnr8w",
				"to_address": "cosmos1mkljjemr94rza337l3uqmntz7tqnrm3lntarf6",
				"amount": [{
					"denom": "uatom",
					"amount": "1041100"
				}]
			}
		}],
		"fee": {
			"gas": "74117",
			"amount": [{
				"denom": "uatom",
				"amount": "1000"
			}]
		},
		"memo": "",
		"signatures": [{
			"signature": "rJdMEOzd5lNI9dRbURSuxOOzs2KaJUzDuA3ZHT6rACtzvHsGZ0maTHQkfGYAzZNcv03tUBYAQjS7/Lu343DkvQ==",
			"pub_key": {
				"type": "tendermint/PubKeySecp256k1",
				"value": "AuffQiSZzkY2ulXITteOfEMVPvc4h4cZHQq0YsT5qyjS"
			},
			"account_number": "62932",
			"sequence": "2"
		}]
	},
	"mode": "sync"
}

or does it need to be update as below:

"tx": {
	"body": {
		"messages": [{
			"@type": "/cosmos.bank.v1beta1.MsgSend",
			"from_address": "cosmos1k0k9jlj9hgduk5xn2nrgrygv7900hptk2xnr8w",
			"to_address": "cosmos1favsh7vjakvfe2qddjdxtwmmxqfakc7jyqlhs3",
			"amount": [{
				"denom": "uatom",
				"amount": "20000"
			}]
		}],
		"memo": "",
		"timeout_height": "0",
		"extension_options": [],
		"non_critical_extension_options": []
	},
	"auth_info": {
		"signer_infos": [{
			"public_key": {
				"@type": "/cosmos.crypto.secp256k1.PubKey",
				"key": "AuffQiSZzkY2ulXITteOfEMVPvc4h4cZHQq0YsT5qyjS"
			},
			"mode_info": {
				"single": {
					"mode": "SIGN_MODE_LEGACY_AMINO_JSON"
				}
			},
			"sequence": "0"
		}],
		"fee": {
			"amount": [{
				"denom": "uatom",
				"amount": "1000"
			}],
			"gas_limit": "74117",
			"payer": "",
			"granter": ""
		}
	},
	"signatures": ["usdaBp6VRXe2AC/fGjqUFnbTuq884oyf8sdmRWWr5bYjK1T5Pgjy2H06qUcR02p6eOymqWkywRdK73jn5ZBvgg=="]
},

luca992 · 2022-05-13T20:12:41Z

The second. It'd be tx_bytes not tx

But, the structure looks approximately right to me. You are going to have to encode all of those sub-objects with @type to protobufs byte arrays

devkhalil1337 · 2022-05-16T20:48:20Z

Thanks again for your time @luca992

broadcast Object :

{
	"body": {
		"messages": [{
			"@type": "/cosmos.bank.v1beta1.MsgSend",
			"from_address": "cosmos1k0k9jlj9hgduk5xn2nrgrygv7900hptk2xnr8w",
			"to_address": "cosmos1mkljjemr94rza337l3uqmntz7tqnrm3lntarf6",
			"amount": [{
				"denom": "uatom",
				"amount": "1041100"
			}]
		}],
		"memo": "",
		"timeout_height": "0",
		"extension_options": [],
		"non_critical_extension_options": []
	},
	"AuthInfo": {
		"signer_infos": [{
			"public_key": {
				"@type": "/cosmos.crypto.secp256k1.PubKey",
				"key": "AuffQiSZzkY2ulXITteOfEMVPvc4h4cZHQq0YsT5qyjS"
			},
			"mode_info": {
				"single": {
					"mode": "SIGN_MODE_LEGACY_AMINO_JSON"
				}
			},
			"sequence": "2"
		}],
		"fee": {
			"amount": [{
				"denom": "uatom",
				"amount": "1000"
			}],
			"gas_limit": "74117",
			"payer": "",
			"granter": ""
		}
	},
	"signatures": ["rJdMEOzd5lNI9dRbURSuxOOzs2KaJUzDuA3ZHT6rACtzvHsGZ0maTHQkfGYAzZNcv03tUBYAQjS7/Lu343DkvQ=="]
}

then converting it to base64
Buffer.from(JSON.stringify(broadcast)).toString('base64')

Final Payload:

{
    "tx_bytes": "eyJib2R5Ijp7Im1lc3NhZ2VzIjpbeyJAdHlwZSI6Ii9jb3Ntb3MuYmFuay52MWJldGExLk1zZ1NlbmQiLCJmcm9tX2FkZHJlc3MiOiJjb3Ntb3MxazBrOWpsajloZ2R1azV4bjJucmdyeWd2NzkwMGhwdGsyeG5yOHciLCJ0b19hZGRyZXNzIjoiY29zbW9zMW1rbGpqZW1yOTRyemEzMzdsM3VxbW50ejd0cW5ybTNsbnRhcmY2IiwiYW1vdW50IjpbeyJkZW5vbSI6InVhdG9tIiwiYW1vdW50IjoiMTA0MTEwMCJ9XX1dLCJtZW1vIjoiIiwidGltZW91dF9oZWlnaHQiOiIwIiwiZXh0ZW5zaW9uX29wdGlvbnMiOltdLCJub25fY3JpdGljYWxfZXh0ZW5zaW9uX29wdGlvbnMiOltdfSwiQXV0aEluZm8iOnsic2lnbmVyX2luZm9zIjpbeyJwdWJsaWNfa2V5Ijp7IkB0eXBlIjoiL2Nvc21vcy5jcnlwdG8uc2VjcDI1NmsxLlB1YktleSIsImtleSI6IkF1ZmZRaVNaemtZMnVsWElUdGVPZkVNVlB2YzRoNGNaSFFxMFlzVDVxeWpTIn0sIm1vZGVfaW5mbyI6eyJzaW5nbGUiOnsibW9kZSI6IlNJR05fTU9ERV9MRUdBQ1lfQU1JTk9fSlNPTiJ9fSwic2VxdWVuY2UiOiIyIn1dLCJmZWUiOnsiYW1vdW50IjpbeyJkZW5vbSI6InVhdG9tIiwiYW1vdW50IjoiMTAwMCJ9XSwiZ2FzX2xpbWl0IjoiNzQxMTciLCJwYXllciI6IiIsImdyYW50ZXIiOiIifX0sInNpZ25hdHVyZXMiOlsickpkTUVPemQ1bE5JOWRSYlVSU3V4T096czJLYUpVekR1QTNaSFQ2ckFDdHp2SHNHWjBtYVRIUWtmR1lBelpOY3YwM3RVQllBUWpTNy9MdTM0M0RrdlE9PSJdfQ==",
    "mode": "BROADCAST_MODE_SYNC"
}

Response:

{
    "tx_response": {
        "height": "0",
        "txhash": "AA38BAF1606F7A9CAF9E5181111F9C237942E1039DEFAB7BD9D1039A7894549E",
        "codespace": "sdk",
        "code": 2,
        "data": "",
        "raw_log": "expected 2 wire type, got 3: tx parse error",
        "logs": [],
        "info": "",
        "gas_wanted": "0",
        "gas_used": "0",
        "tx": null,
        "timestamp": "",
        "events": []
    }
}

luca992 · 2022-05-16T21:00:53Z

That won't work. You are encoding json to a byte array. You need to build a protobuffer object that contains that data. Then encode the protobuffer to a byte array

elite0226 · 2022-09-04T22:11:35Z

Any solutions here?

alexanderbez · 2022-09-05T14:00:13Z

Any solutions here?

Sorry @elite0226, but what are you trying to do again?

tac0turtle · 2023-03-01T11:55:01Z

are you manually constructing the body or using a library. the client package in the sdk and cosmjs give you ways to handle this out of the box.

also with 0.47 there are endpoints that will handle the encoding needed for signing and broadcasting this would fix the need to write your own implementations

shang-chi-7 · 2023-08-17T08:43:08Z

Any update on this, facing same issue ?

bd21 · 2023-09-03T04:36:31Z

+1 on the docs being complete ass. The example on calling modules programmatically with Go doesn't even resolve.

@tac0turtle you guys should hire a technical writer

GabrielFerraroDev · 2024-02-06T19:30:45Z

someone has updates on this? i have the same problem

tac0turtle added T:Sprint T:question labels Jan 16, 2023

tac0turtle changed the title ~~Converting post body to /cosmos/tx/v1beta1/txs from /txs~~ docs: add docs on how to construct and broadcast transactions Mar 24, 2023

tac0turtle added T:Docs Changes and features related to documentation. and removed T:question labels Apr 3, 2023

tac0turtle removed the T:Sprint label Nov 16, 2023

samricotta mentioned this issue May 15, 2024

[Epic]: Documentation Revise Cycle cosmos/cosmos-sdk-docs#139

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samricotta self-assigned this May 15, 2024

samricotta linked a pull request May 17, 2024 that will close this issue

docs: constructing txs for /cosmos/tx/v1beta1/txs endpoint #20421

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docs: add docs on how to construct and broadcast transactions #11625

docs: add docs on how to construct and broadcast transactions #11625

luca992 commented Apr 13, 2022 •

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docs: add docs on how to construct and broadcast transactions #11625

docs: add docs on how to construct and broadcast transactions #11625

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