move interface_getter.go from ens_watcher to vDB pkging- used to construct a custom ABI based on results from calls to supportsInterface; also moved fetcher.go from examples to pkg

pkg/omni/shared/parser/parser.go

@@ -31,6 +31,7 @@ import (
 // It is dependent on etherscan's api
 type Parser interface {
 	Parse(contractAddr string) error
+	ParseAbiStr(abiStr string) error
 	Abi() string
 	ParsedAbi() abi.ABI
 	GetMethods(wanted []string) []types.Method
@@ -83,6 +84,15 @@ func (p *parser) Parse(contractAddr string) error {
 	return err
 }
 
+// Loads and parses an abi from a given abi string
+func (p *parser) ParseAbiStr(abiStr string) error {
+	var err error
+	p.abi = abiStr
+	p.parsedAbi, err = geth.ParseAbi(abiStr)
+
+	return err
+}
+
 func (p *parser) lookUp(contractAddr string) (string, error) {
 	if v, ok := constants.Abis[common.HexToAddress(contractAddr)]; ok {
 		return v, nil