Payload JSON Formats for Different Chains

EVM Compatible Chains

V4 (EIP-712)

{
  "domain": {
    "chainId": "5",
    "name": "Ether Mail",
    "verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC",
    "version": "1"
  },
  "message": {
    "contents": "Hello, Bob!",
    "from": {
      "name": "Cow",
      "wallets": [
        "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826",
        "0xDeaDbeefdEAdbeefdEadbEEFdeadbeEFdEaDbeeF"
      ]
    },
    "to": [
      {
        "name": "Bob",
        "wallets": [
          "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB",
          "0xB0BdaBea57B0BDABeA57b0bdABEA57b0BDabEa57",
          "0xB0B0b0b0b0b0B000000000000000000000000000"
        ]
      }
    ]
  },
  "primaryType": "Mail",
  "types": {
    "EIP712Domain": [
      {"name": "name", "type": "string"},
      {"name": "version", "type": "string"},
      {"name": "chainId", "type": "uint256"},
      {"name": "verifyingContract", "type": "address"}
    ],
    "Group": [
      {"name": "name", "type": "string"},
      {"name": "members", "type": "Person[]"}
    ],
    "Mail": [
      {"name": "from", "type": "Person"},
      {"name": "to", "type": "Person[]"},
      {"name": "contents", "type": "string"}
    ],
    "Person": [
      {"name": "name", "type": "string"},
      {"name": "wallets", "type": "address[]"}
    ]
  }
}

personalSign

{
  "message": "0x2ca3vaa3....."
}

BTC Chain

signMessage

{
  "text": "hello world~"
}

signPsbt / signPsbts

[
    {
        "id": 1,
        "options": {
        "auto_finalized": false,
        "to_sign_inputs": [
            {
            "index": 0,
            "address": null,
            "public_key": "03b7d09ec077ecdd4dd50c21d68637f0f2bc8f32e8973a7456924308eeba4ecf13",
            "sighash_types": null,
            "disable_tweak_signer": false
            }
        ]
        },
        "rawtx": null,
        "dapp": "https://stake2.dev.btcs.network/my-staking#btc",
        "psbt_hex": "70736274ff010052020000000160aa1a9123351f1a74ba04f861693c0d894cb299ada7170844a3fae53b1643e90000000000feffffff01a5b40d0000000000160014c3fcec007e97b22d72859fb900f8aafe87d676a6d31736670001012b40420f0000000000220020bc30954e24a0f54e027f0d9d8203b1e8304873ce40dfb9eda40e28e8f6bbf20401052004d3173667b17576a914c3fcec007e97b22d72859fb900f8aafe87d676a688ac0000",
        "signed_psbt_hex": null
    }
]

Cosmos-Based Chains

signAmino

{
  "account_number": "123",
  "chain_id": "cosmoshub-4",
  "fee": {
    "amount": [{ "denom": "uatom", "amount": "1000" }],
    "gas": "200000"
  },
  "memo": "Test transaction",
  "msgs": [
    {
      "type": "cosmos-sdk/MsgSend",
      "value": {
        "from_address": "cosmos1...",
        "to_address": "cosmos1...",
        "amount": [{ "denom": "uatom", "amount": "1000000" }]
      }
    }
  ],
  "sequence": "42"
}

signDirect

{
  "body": {
    "messages": [
      {
        "@type": "/cosmos.bank.v1beta1.MsgSend",
        "from_address": "cosmos1...",
        "to_address": "cosmos1...",
        "amount": [{ "denom": "uatom", "amount": "1000000" }]
      }
    ],
    "memo": "Test transaction",
    "timeout_height": "0",
    "extension_options": [],
    "non_critical_extension_options": []
  },
  "auth_info": {
    "signer_infos": [
      {
        "public_key": { "@type": "/cosmos.crypto.secp256k1.PubKey", "key": "A3..." },
        "mode_info": { "single": { "mode": "SIGN_MODE_DIRECT" } },
        "sequence": "42"
      }
    ],
    "fee": {
      "amount": [{ "denom": "uatom", "amount": "1000" }],
      "gas_limit": "200000",
      "payer": "",
      "granter": ""
    }
  },
  "chain_id": "cosmoshub-4",
  "account_number": "123"
}

signArbitrary

{
  "chain_id": "cosmoshub-4",
  "account_number": "123",
  "sequence": "42",
  "fee": {
    "amount": [],
    "gas": "0"
  },
  "msgs": [
    {
      "type": "sign/MsgSignData",
      "value": {
        "signer": "cosmos1...",
        "data": "VGhpcyBpcyBhIHRlc3QgbWVzc2FnZQ==" // Base64 encoded arbitrary data
      }
    }
  ],
  "memo": ""
}