elrond - Erdpy:代币发行交易失败，代码为:internal_issue

Question

我尝试使用以下 Python 代码进行 ESDT 代币发行交易

from erdpy.accounts import Account, Address
from erdpy.proxy import ElrondProxy
from erdpy.transactions import BunchOfTransactions
from erdpy.transactions import Transaction
from erdpy.wallet import signing


TOKEN_NAME = b"Cowdings"
TOKEN_SYMBOL = b"MOO"

DECIMALS = 18
SUPPLY = 1000 * 10**DECIMALS


def hex_string(s: str) -> str:
    assert type(s) == bytes, "Make sure everything is bytes data or utf-8 encoded"
    return hexlify(s).decode("ascii")


def hex_int(i: int) -> str:
    assert type(i) == int, "Make sure everything is bytes data or utf-8 encoded"
    return hex(i)[2:]


proxy = ElrondProxy("https://devnet-gateway.elrond.com")
sender = Account(pem_file="test-wallet.pem")
sender.sync_nonce(proxy)

tx = Transaction()
tx.nonce = sender.nonce
tx.value = str(0.05 * 10**18)  # 0.05 EGLD, as required for issuing a token according to the documentation
tx.sender = sender.address.bech32()
# System contract address to issue out the new token as per
# https://docs.elrond.com/developers/esdt-tokens/#issuance-of-fungible-esdt-tokens
tx.receiver = "erd1qqqqqqqqqqqqqqqpqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqzllls8a5w6u"
tx.gasPrice = 1000000000
tx.gasLimit = 50000
tx.data = f"issue" \
          f"@{hex_string(TOKEN_NAME)}" \
          f"@{hex_string(TOKEN_SYMBOL)}" \
          f"@{hex_int(SUPPLY)}" \
          f"@{hex_int(DECIMALS)}" 

tx.chainID = "D"  # For devnet https://devnet-gateway.elrond.com/network/config
tx.version = 1

tx.signature = signing.sign_transaction(tx, sender)
tx.send(proxy)

它失败了

ProxyRequestError: Proxy request error for url [https://devnet-gateway.elrond.com/transaction/send]: 
{
    'data': None, 
    'error': 'transaction generation failed: invalid value', 
    'code': 'internal_issue'
}

Answer 1

您使用 str(0.05 * 10**18)获取值的字符串。
然而，这实际上是以科学记数法输出的值，这不是区块链所期望的。

>>> str(0.05 * 10**18)
'5e+16'

将其转换为 int首先将强制正确输出，因此您可以使用 str(int(0.05 * 10**18))反而 :)
因此，完整代码应如下所示:

from erdpy.accounts import Account, Address
from erdpy.proxy import ElrondProxy
from erdpy.transactions import BunchOfTransactions
from erdpy.transactions import Transaction
from erdpy.wallet import signing


TOKEN_NAME = b"Cowdings"
TOKEN_SYMBOL = b"MOO"

DECIMALS = 18
SUPPLY = 1000 * 10**DECIMALS


def hex_string(s: str) -> str:
    assert type(s) == bytes, "Make sure everything is bytes data or utf-8 encoded"
    return hexlify(s).decode("ascii")


def hex_int(i: int) -> str:
    assert type(i) == int, "Make sure everything is bytes data or utf-8 encoded"
    return hex(i)[2:]


proxy = ElrondProxy("https://devnet-gateway.elrond.com")
sender = Account(pem_file="test-wallet.pem")
sender.sync_nonce(proxy)

tx = Transaction()
tx.nonce = sender.nonce
tx.value = str(int(0.05 * 10**18))  # 0.05 EGLD, as required for issuing a token according to the documentation
tx.sender = sender.address.bech32()
# System contract address to issue out the new token as per
# https://docs.elrond.com/developers/esdt-tokens/#issuance-of-fungible-esdt-tokens
tx.receiver = "erd1qqqqqqqqqqqqqqqpqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqzllls8a5w6u"
tx.gasPrice = 1000000000
tx.gasLimit = 50000
tx.data = f"issue" \
          f"@{hex_string(TOKEN_NAME)}" \
          f"@{hex_string(TOKEN_SYMBOL)}" \
          f"@{hex_int(SUPPLY)}" \
          f"@{hex_int(DECIMALS)}" 

tx.chainID = "D"  # For devnet https://devnet-gateway.elrond.com/network/config
tx.version = 1

tx.signature = signing.sign_transaction(tx, sender)
tx.send(proxy)