[英]How to get an unsigned transaction data from web3.py using contract interaction
目前我正在做一個項目,我有以下流程:
chain
和token
。data
鍵、值對transaction = await ethereum.request({
method: 'eth_sendTransaction',
params: [
{
to: '{{ paymentrequest.paymentaddress }}',
from: ethereum.selectedAddress,
data: '{{ paymentrequest.transhex }}',
chainId: '{{ paymentrequest.chain.chainid }}'
}],
});
第 3 步是我遇到問題的地方。 為了從 web3.py 計算的 tx 中獲取數據屬性,我必須使用 .call( .call()
或.transact()
。 它們都適用於以太坊鏈。 但是,當我將這些調用應用於 Polygon 或 BSC 鏈上的合約時,它們會報告錯誤,例如:
錯誤 1: BEP20: transfer to zero address
- 我什至不明白這是怎么可能的,因為我四倍檢查了我沒有將零地址輸入 function,但是它仍然在沒有“to”參數的情況下報告此錯誤即使在 function 調用中定義收件人時也是如此。
錯誤 2: BEP20: transfer amount exceeds balance
- 我不想使用來自其他人的帶有一堆代幣的地址來解決此錯誤。 我想遠離別人錢包里有一堆硬幣的限制。
這是我使用的代碼:
def bnbTXCompute(paymentrequest, tokenamount, contractaddress, tokenaddress):
w3 = Web3(Web3.HTTPProvider(paymentrequest.chain.rpc, request_kwargs={'timeout': 60}))
w3.middleware_onion.inject(geth_poa_middleware, layer=0)
contract = w3.eth.contract(address=contractaddress, abi=paymentrequest.token.abi)
txn = contract.functions.transfer(paymentrequest.wallet,
tokenamount * pow(10, paymentrequest.token.decimals)).call({"to": tokenaddress, "from": "0xbunchoflettersandnumbers"}, )
# I have tried to remove both the "to" and "from" parameters, but they both result in either error 1 or 2
return txn["data"]
def polyTXCompute(paymentrequest, tokenamount, contractaddress, tokenaddress):
w3 = Web3(Web3.HTTPProvider(paymentrequest.chain.rpc, request_kwargs={'timeout': 60}))
w3.middleware_onion.inject(geth_poa_middleware, layer=0)
contract = w3.eth.contract(address=contractaddress, abi=paymentrequest.token.abi)
txn = contract.functions.transfer(paymentrequest.wallet,
tokenamount * pow(10, paymentrequest.token.decimals)).transact({"to": tokenaddress, "from": "0xbunchoflettersandnumbers"})
return txn["data"]
def ethTXCompute(paymentrequest, tokenamount, contractaddress):
w3 = Web3(Web3.HTTPProvider(paymentrequest.chain.rpc, request_kwargs={'timeout': 60}))
w3.middleware_onion.inject(geth_poa_middleware, layer=0)
contract = w3.eth.contract(address=contractaddress, abi=paymentrequest.token.abi)
txn = contract.functions.transfer(paymentrequest.wallet,
tokenamount * pow(10, paymentrequest.token.decimals)).transact()
return txn["data"]
我想到的解決方案是在返回數據 hash 之前跳過 web3.py 正在執行的所有這些檢查。 但是我無法做到這樣的事情。 任何幫助表示贊賞。
web3.py 文檔: https://web3py.readthedocs.io/en/latest/
和往常一樣,開發人員應該更好地閱讀:
代替:
txn = contract.functions.transfer(paymentrequest.wallet, tokenamount * pow(10, paymentrequest.token.decimals)).call({"to": tokenaddress, "from": "0xbunchoflettersandnumbers"}, )
和:
txn = contract.encodeABI(fn_name="transfer", args=[paymentrequest.wallet, tokenamount * pow(10, paymentrequest.token.decimals)])
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