How to decode transaction data? Can we know transaction value?

[linxianxi]

const data = "0x7ff36ab500000000000000000000000000000000000000000000000293cbfd33f96697e900000000000000000000000000000000000000000000000000000000000000800000000000000000000000007808583fdaa53eb4f16f69956f7db79f7dc83df40000000000000000000000000000000000000000000000000000000062a712970000000000000000000000000000000000000000000000000000000000000002000000000000000000000000ae13d989dac2f0debff460ac112a837c89baa7cd00000000000000000000000078867bbeef44f2326bf8ddd1941a4439382ef2a7"

abi like this

[ricmoo]

Your ABI is missing the necessary methods, but assuming you have the full ABI, you can use:

// Assuming the ABI and data above

> iface = new Interface(ABI)
> iface.parseTransaction({ data })
TransactionDescription {
  args: [ BigNumber { value: "47543372290936182761" }, [ "0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd", "0x78867BbEeF44f2326bF8DDd1941a4439382EF2A7" ], "0x7808583fdAA53eb4f16F69956F7dB79F7dc83DF4", BigNumber { value: "1655116439" } ],
  name: "swapExactETHForTokens",
  signature: "swapExactETHForTokens(uint256,address[],address,uint256)",
  sighash: "0x7ff36ab5",
  value: BigNumber { value: "0" }
}

Let me know if that helps.

[linxianxi]

I forgot to mention, WalletConnect return data, from, to, "to" should be the contract address. Is there any way to get an ABI in my code?

[ricmoo]

Yes, use that to address and look on Etherscan. If it is a popular contract it will have the ABI. You will probably want to research a bit more about Ethereum before doing too much with it though.

[linxianxi]

Is there an API for querying? Can you send me the address? Thank you

[linxianxi]

I used 4byte to get 'swapExactETHForTokens(uint256,address[],address,uint256)', how to use this string to get ABI?

[zemse]

Just adding the keyword function initially should work: function swapExactETHForTokens(uint256,address[],address,uint256)

Also you can check out Human-readable abi docs.