Function fetchTokenSymbol

packages/cardpay-subgraph/src/utils.ts:202–227

(tokenAddress: Address)

}

function fetchTokenSymbol(tokenAddress: Address): string {
  let staticToken = StaticToken.fromAddress(tokenAddress);
  if (staticToken != null) {
    return (staticToken as StaticToken).symbol;
  }

  let contract = ERC20.bind(tokenAddress);
  let contractSymbolBytes = ERC20SymbolBytes.bind(tokenAddress);

  // try types string and bytes32 for symbol
  let symbolValue = 'unknown';
  let symbolResult = contract.try_symbol();
  if (symbolResult.reverted) {
    let symbolResultBytes = contractSymbolBytes.try_symbol();
    if (!symbolResultBytes.reverted) {
      // for token that has no symbol function exposed
      if (!isNullEthValue(symbolResultBytes.value.toHexString())) {
        symbolValue = symbolResultBytes.value.toString();
      }
    }
  } else {
    symbolValue = symbolResult.value;
  }

  return symbolValue;
}

function fetchTokenName(tokenAddress: Address): string {
  let staticToken = StaticToken.fromAddress(tokenAddress);